Merge branch 'dev' into test/e2e-setup

.gitignore

@@ -738,3 +738,5 @@ flycheck_*.el
 /network-security.data
 
 docs/.venv
+idp_data/h2/keycloakdb.mv.db
+idp_data/h2/keycloakdb.trace.db

backend/.env-old

@@ -1,21 +0,0 @@
-PORT=3000
-DWENGO_DB_HOST=db
-DWENGO_DB_PORT=5432
-DWENGO_DB_USERNAME=postgres
-DWENGO_DB_PASSWORD=postgres
-DWENGO_DB_UPDATE=false
-
-DWENGO_AUTH_STUDENT_URL=http://localhost/idp/realms/student
-DWENGO_AUTH_STUDENT_CLIENT_ID=dwengo
-DWENGO_AUTH_STUDENT_JWKS_ENDPOINT=http://idp:7080/idp/realms/student/protocol/openid-connect/certs
-DWENGO_AUTH_TEACHER_URL=http://localhost/idp/realms/teacher
-DWENGO_AUTH_TEACHER_CLIENT_ID=dwengo
-DWENGO_AUTH_TEACHER_JWKS_ENDPOINT=http://idp:7080/idp/realms/teacher/protocol/openid-connect/certs
-
-# Allow Vite dev-server to access the backend (for testing purposes). Don't forget to remove this in production!
-#DWENGO_CORS_ALLOWED_ORIGINS=http://localhost/,127.0.0.1:80,http://127.0.0.1,http://localhost:80,http://127.0.0.1:80,localhost
-DWENGO_CORS_ALLOWED_ORIGINS=http://localhost/*,http://idp:7080,https://idp:7080
-
-# Logging and monitoring
-
-LOKI_HOST=http://logging:3102

backend/.env.test

@@ -11,3 +11,10 @@ DWENGO_PORT=3000
 
 DWENGO_DB_NAME=":memory:"
 DWENGO_DB_UPDATE=true
+
+DWENGO_AUTH_STUDENT_URL=http://localhost:7080/realms/student
+DWENGO_AUTH_STUDENT_JWKS_ENDPOINT=http://localhost:7080/realms/student/protocol/openid-connect/certs
+DWENGO_AUTH_TEACHER_URL=http://localhost:7080/realms/teacher
+DWENGO_AUTH_TEACHER_JWKS_ENDPOINT=http://localhost:7080/realms/teacher/protocol/openid-connect/certs
+
+DWENGO_CORS_ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000

backend/package.json

@@ -7,7 +7,8 @@
     "main": "dist/app.js",
     "scripts": {
         "build": "cross-env NODE_ENV=production tsc --build",
-        "dev": "cross-env NODE_ENV=development tsx tool/seed.ts; tsx watch --env-file=.env.development.local src/app.ts",
+        "predev": "tsc --build ../common/tsconfig.json",
+        "dev": "cross-env NODE_ENV=development tsx tool/seed.ts && tsx watch --env-file=.env.development.local src/app.ts",
         "start": "cross-env NODE_ENV=production node --env-file=.env dist/app.js",
         "format": "prettier --write src/",
         "format-check": "prettier --check src/",
@@ -16,11 +17,11 @@
         "test:unit": "vitest --run"
     },
     "dependencies": {
-        "@mikro-orm/core": "6.4.9",
-        "@mikro-orm/knex": "6.4.9",
-        "@mikro-orm/postgresql": "6.4.9",
-        "@mikro-orm/reflection": "6.4.9",
-        "@mikro-orm/sqlite": "6.4.9",
+        "@mikro-orm/core": "6.4.12",
+        "@mikro-orm/knex": "6.4.12",
+        "@mikro-orm/postgresql": "6.4.12",
+        "@mikro-orm/reflection": "6.4.12",
+        "@mikro-orm/sqlite": "6.4.12",
         "axios": "^1.8.2",
         "cors": "^2.8.5",
         "cross": "^1.0.0",
@@ -42,7 +43,7 @@
         "winston-loki": "^6.1.3"
     },
     "devDependencies": {
-        "@mikro-orm/cli": "6.4.9",
+        "@mikro-orm/cli": "6.4.12",
         "@types/cors": "^2.8.17",
         "@types/express": "^5.0.0",
         "@types/js-yaml": "^4.0.9",

backend/src/controllers/auth.ts

@@ -1,4 +1,10 @@
+import { UnauthorizedException } from '../exceptions/unauthorized-exception.js';
+import { getLogger } from '../logging/initalize.js';
+import { AuthenticatedRequest } from '../middleware/auth/authenticated-request.js';
+import { createOrUpdateStudent } from '../services/students.js';
+import { createOrUpdateTeacher } from '../services/teachers.js';
 import { envVars, getEnvVar } from '../util/envVars.js';
+import { Response } from 'express';
 
 interface FrontendIdpConfig {
     authority: string;
@@ -15,6 +21,8 @@ interface FrontendAuthConfig {
 const SCOPE = 'openid profile email';
 const RESPONSE_TYPE = 'code';
 
+const logger = getLogger();
+
 export function getFrontendAuthConfig(): FrontendAuthConfig {
     return {
         student: {
@@ -31,3 +39,24 @@ export function getFrontendAuthConfig(): FrontendAuthConfig {
         },
     };
 }
+
+export async function postHelloHandler(req: AuthenticatedRequest, res: Response): Promise<void> {
+    const auth = req.auth;
+    if (!auth) {
+        throw new UnauthorizedException('Cannot say hello when not authenticated.');
+    }
+    const userData = {
+        id: auth.username,
+        username: auth.username,
+        firstName: auth.firstName ?? '',
+        lastName: auth.lastName ?? '',
+    };
+    if (auth.accountType === 'student') {
+        await createOrUpdateStudent(userData);
+        logger.debug(`Synchronized student ${userData.username} with IDP`);
+    } else {
+        await createOrUpdateTeacher(userData);
+        logger.debug(`Synchronized teacher ${userData.username} with IDP`);
+    }
+    res.status(200).send({ message: 'Welcome!' });
+}

backend/src/controllers/groups.ts

@@ -69,8 +69,8 @@ export async function getAllGroupsHandler(req: Request, res: Response): Promise<
 export async function createGroupHandler(req: Request, res: Response): Promise<void> {
     const classid = req.params.classid;
     const assignmentId = Number(req.params.assignmentid);
-
-    requireFields({ classid, assignmentId });
+    const members = req.body.members;
+    requireFields({ classid, assignmentId, members });
 
     if (isNaN(assignmentId)) {
         throw new BadRequestException('Assignment id must be a number');

backend/src/controllers/learning-paths.ts

@@ -3,13 +3,10 @@ import { themes } from '../data/themes.js';
 import { FALLBACK_LANG } from '../config.js';
 import learningPathService from '../services/learning-paths/learning-path-service.js';
 import { Language } from '@dwengo-1/common/util/language';
-import {
-    PersonalizationTarget,
-    personalizedForGroup,
-    personalizedForStudent,
-} from '../services/learning-paths/learning-path-personalization-util.js';
 import { BadRequestException } from '../exceptions/bad-request-exception.js';
 import { NotFoundException } from '../exceptions/not-found-exception.js';
+import { Group } from '../entities/assignments/group.entity.js';
+import { getAssignmentRepository, getGroupRepository } from '../data/repositories.js';
 
 /**
  * Fetch learning paths based on query parameters.
@@ -20,20 +17,20 @@ export async function getLearningPaths(req: Request, res: Response): Promise<voi
     const searchQuery = req.query.search as string;
     const language = (req.query.language as string) || FALLBACK_LANG;
 
-    const forStudent = req.query.forStudent as string;
     const forGroupNo = req.query.forGroup as string;
     const assignmentNo = req.query.assignmentNo as string;
     const classId = req.query.classId as string;
 
-    let personalizationTarget: PersonalizationTarget | undefined;
+    let forGroup: Group | undefined;
 
-    if (forStudent) {
-        personalizationTarget = await personalizedForStudent(forStudent);
-    } else if (forGroupNo) {
+    if (forGroupNo) {
         if (!assignmentNo || !classId) {
             throw new BadRequestException('If forGroupNo is specified, assignmentNo and classId must also be specified.');
         }
-        personalizationTarget = await personalizedForGroup(classId, parseInt(assignmentNo), parseInt(forGroupNo));
+        const assignment = await getAssignmentRepository().findByClassIdAndAssignmentId(classId, parseInt(assignmentNo));
+        if (assignment) {
+            forGroup = (await getGroupRepository().findByAssignmentAndGroupNumber(assignment, parseInt(forGroupNo))) ?? undefined;
+        }
     }
 
     let hruidList;
@@ -48,18 +45,13 @@ export async function getLearningPaths(req: Request, res: Response): Promise<voi
             throw new NotFoundException(`Theme "${themeKey}" not found.`);
         }
     } else if (searchQuery) {
-        const searchResults = await learningPathService.searchLearningPaths(searchQuery, language as Language, personalizationTarget);
+        const searchResults = await learningPathService.searchLearningPaths(searchQuery, language as Language, forGroup);
         res.json(searchResults);
         return;
     } else {
         hruidList = themes.flatMap((theme) => theme.hruids);
     }
 
-    const learningPaths = await learningPathService.fetchLearningPaths(
-        hruidList,
-        language as Language,
-        `HRUIDs: ${hruidList.join(', ')}`,
-        personalizationTarget
-    );
+    const learningPaths = await learningPathService.fetchLearningPaths(hruidList, language as Language, `HRUIDs: ${hruidList.join(', ')}`, forGroup);
     res.json(learningPaths.data);
 }

backend/src/controllers/submissions.ts

@@ -17,15 +17,18 @@ export async function getSubmissionsHandler(req: Request, res: Response): Promis
     const lang = languageMap[req.query.language as string] || Language.Dutch;
     const version = parseInt(req.query.version as string) ?? 1;
 
-    const submissions = await getSubmissionsForLearningObjectAndAssignment(
+    const forGroup = req.query.forGroup as string | undefined;
+
+    const submissions: SubmissionDTO[] = await getSubmissionsForLearningObjectAndAssignment(
         loHruid,
         lang,
         version,
         req.query.classId as string,
-        parseInt(req.query.assignmentId as string)
+        parseInt(req.query.assignmentId as string),
+        forGroup ? parseInt(forGroup) : undefined
     );
 
-    res.json(submissions);
+    res.json({ submissions });
 }
 
 export async function getSubmissionHandler(req: Request, res: Response): Promise<void> {

backend/src/controllers/teacher-invitations.ts

@@ -0,0 +1,66 @@
+import { Request, Response } from 'express';
+import { requireFields } from './error-helper.js';
+import { createInvitation, deleteInvitation, getAllInvitations, getInvitation, updateInvitation } from '../services/teacher-invitations.js';
+import { TeacherInvitationData } from '@dwengo-1/common/interfaces/teacher-invitation';
+
+export async function getAllInvitationsHandler(req: Request, res: Response): Promise<void> {
+    const username = req.params.username;
+    const by = req.query.sent === 'true';
+    requireFields({ username });
+
+    const invitations = await getAllInvitations(username, by);
+
+    res.json({ invitations });
+}
+
+export async function getInvitationHandler(req: Request, res: Response): Promise<void> {
+    const sender = req.params.sender;
+    const receiver = req.params.receiver;
+    const classId = req.params.classId;
+    requireFields({ sender, receiver, classId });
+
+    const invitation = await getInvitation(sender, receiver, classId);
+
+    res.json({ invitation });
+}
+
+export async function createInvitationHandler(req: Request, res: Response): Promise<void> {
+    const sender = req.body.sender;
+    const receiver = req.body.receiver;
+    const classId = req.body.class;
+    requireFields({ sender, receiver, classId });
+
+    const data = req.body as TeacherInvitationData;
+    const invitation = await createInvitation(data);
+
+    res.json({ invitation });
+}
+
+export async function updateInvitationHandler(req: Request, res: Response): Promise<void> {
+    const sender = req.body.sender;
+    const receiver = req.body.receiver;
+    const classId = req.body.class;
+    req.body.accepted = req.body.accepted !== false;
+    requireFields({ sender, receiver, classId });
+
+    const data = req.body as TeacherInvitationData;
+    const invitation = await updateInvitation(data);
+
+    res.json({ invitation });
+}
+
+export async function deleteInvitationHandler(req: Request, res: Response): Promise<void> {
+    const sender = req.params.sender;
+    const receiver = req.params.receiver;
+    const classId = req.params.classId;
+    requireFields({ sender, receiver, classId });
+
+    const data: TeacherInvitationData = {
+        sender,
+        receiver,
+        class: classId,
+    };
+    const invitation = await deleteInvitation(data);
+
+    res.json({ invitation });
+}

backend/src/data/assignments/assignment-repository.ts

@@ -4,7 +4,7 @@ import { Class } from '../../entities/classes/class.entity.js';
 
 export class AssignmentRepository extends DwengoEntityRepository<Assignment> {
     public async findByClassAndId(within: Class, id: number): Promise<Assignment | null> {
-        return this.findOne({ within: within, id: id });
+        return this.findOne({ within: within, id: id }, { populate: ['groups', 'groups.members'] });
     }
     public async findByClassIdAndAssignmentId(withinClass: string, id: number): Promise<Assignment | null> {
         return this.findOne({ within: { classId: withinClass }, id: id });
@@ -23,7 +23,7 @@ export class AssignmentRepository extends DwengoEntityRepository<Assignment> {
         });
     }
     public async findAllAssignmentsInClass(within: Class): Promise<Assignment[]> {
-        return this.findAll({ where: { within: within } });
+        return this.findAll({ where: { within: within }, populate: ['groups', 'groups.members'] });
     }
     public async deleteByClassAndId(within: Class, id: number): Promise<void> {
         return this.deleteWhere({ within: within, id: id });

backend/src/data/assignments/submission-repository.ts

@@ -61,32 +61,30 @@ export class SubmissionRepository extends DwengoEntityRepository<Submission> {
 
     /**
      * Looks up all submissions for the given learning object which were submitted as part of the given assignment.
-     * When forStudentUsername is set, only the submissions of the given user's group are shown.
      */
-    public async findAllSubmissionsForLearningObjectAndAssignment(
-        loId: LearningObjectIdentifier,
-        assignment: Assignment,
-        forStudentUsername?: string
-    ): Promise<Submission[]> {
-        const onBehalfOf = forStudentUsername
-            ? {
-                  assignment,
-                  members: {
-                      $some: {
-                          username: forStudentUsername,
-                      },
-                  },
-              }
-            : {
-                  assignment,
-              };
-
+    public async findAllSubmissionsForLearningObjectAndAssignment(loId: LearningObjectIdentifier, assignment: Assignment): Promise<Submission[]> {
         return this.findAll({
             where: {
                 learningObjectHruid: loId.hruid,
                 learningObjectLanguage: loId.language,
                 learningObjectVersion: loId.version,
-                onBehalfOf,
+                onBehalfOf: {
+                    assignment,
+                },
+            },
+        });
+    }
+
+    /**
+     * Looks up all submissions for the given learning object which were submitted by the given group
+     */
+    public async findAllSubmissionsForLearningObjectAndGroup(loId: LearningObjectIdentifier, group: Group): Promise<Submission[]> {
+        return this.findAll({
+            where: {
+                learningObjectHruid: loId.hruid,
+                learningObjectLanguage: loId.language,
+                learningObjectVersion: loId.version,
+                onBehalfOf: group,
             },
         });
     }

backend/src/data/classes/class-join-request-repository.ts

@@ -2,14 +2,14 @@ import { DwengoEntityRepository } from '../dwengo-entity-repository.js';
 import { Class } from '../../entities/classes/class.entity.js';
 import { ClassJoinRequest } from '../../entities/classes/class-join-request.entity.js';
 import { Student } from '../../entities/users/student.entity.js';
-import { ClassJoinRequestStatus } from '@dwengo-1/common/util/class-join-request';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export class ClassJoinRequestRepository extends DwengoEntityRepository<ClassJoinRequest> {
     public async findAllRequestsBy(requester: Student): Promise<ClassJoinRequest[]> {
         return this.findAll({ where: { requester: requester } });
     }
     public async findAllOpenRequestsTo(clazz: Class): Promise<ClassJoinRequest[]> {
-        return this.findAll({ where: { class: clazz, status: ClassJoinRequestStatus.Open } }); // TODO check if works like this
+        return this.findAll({ where: { class: clazz, status: ClassStatus.Open } }); // TODO check if works like this
     }
     public async findByStudentAndClass(requester: Student, clazz: Class): Promise<ClassJoinRequest | null> {
         return this.findOne({ requester, class: clazz });

backend/src/data/classes/teacher-invitation-repository.ts

@@ -2,6 +2,7 @@ import { DwengoEntityRepository } from '../dwengo-entity-repository.js';
 import { Class } from '../../entities/classes/class.entity.js';
 import { TeacherInvitation } from '../../entities/classes/teacher-invitation.entity.js';
 import { Teacher } from '../../entities/users/teacher.entity.js';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export class TeacherInvitationRepository extends DwengoEntityRepository<TeacherInvitation> {
     public async findAllInvitationsForClass(clazz: Class): Promise<TeacherInvitation[]> {
@@ -11,7 +12,7 @@ export class TeacherInvitationRepository extends DwengoEntityRepository<TeacherI
         return this.findAll({ where: { sender: sender } });
     }
     public async findAllInvitationsFor(receiver: Teacher): Promise<TeacherInvitation[]> {
-        return this.findAll({ where: { receiver: receiver } });
+        return this.findAll({ where: { receiver: receiver, status: ClassStatus.Open } });
     }
     public async deleteBy(clazz: Class, sender: Teacher, receiver: Teacher): Promise<void> {
         return this.deleteWhere({
@@ -20,4 +21,11 @@ export class TeacherInvitationRepository extends DwengoEntityRepository<TeacherI
             class: clazz,
         });
     }
+    public async findBy(clazz: Class, sender: Teacher, receiver: Teacher): Promise<TeacherInvitation | null> {
+        return this.findOne({
+            sender: sender,
+            receiver: receiver,
+            class: clazz,
+        });
+    }
 }

backend/src/data/content/learning-path-repository.ts

@@ -1,6 +1,10 @@
 import { DwengoEntityRepository } from '../dwengo-entity-repository.js';
 import { LearningPath } from '../../entities/content/learning-path.entity.js';
 import { Language } from '@dwengo-1/common/util/language';
+import { LearningPathNode } from '../../entities/content/learning-path-node.entity.js';
+import { RequiredEntityData } from '@mikro-orm/core';
+import { LearningPathTransition } from '../../entities/content/learning-path-transition.entity.js';
+import { EntityAlreadyExistsException } from '../../exceptions/entity-already-exists-exception.js';
 
 export class LearningPathRepository extends DwengoEntityRepository<LearningPath> {
     public async findByHruidAndLanguage(hruid: string, language: Language): Promise<LearningPath | null> {
@@ -23,4 +27,27 @@ export class LearningPathRepository extends DwengoEntityRepository<LearningPath>
             populate: ['nodes', 'nodes.transitions'],
         });
     }
+
+    public createNode(nodeData: RequiredEntityData<LearningPathNode>): LearningPathNode {
+        return this.em.create(LearningPathNode, nodeData);
+    }
+
+    public createTransition(transitionData: RequiredEntityData<LearningPathTransition>): LearningPathTransition {
+        return this.em.create(LearningPathTransition, transitionData);
+    }
+
+    public async saveLearningPathNodesAndTransitions(
+        path: LearningPath,
+        nodes: LearningPathNode[],
+        transitions: LearningPathTransition[],
+        options?: { preventOverwrite?: boolean }
+    ): Promise<void> {
+        if (options?.preventOverwrite && (await this.findOne(path))) {
+            throw new EntityAlreadyExistsException('A learning path with this hruid/language combination already exists.');
+        }
+        const em = this.getEntityManager();
+        await em.persistAndFlush(path);
+        await Promise.all(nodes.map(async (it) => em.persistAndFlush(it)));
+        await Promise.all(transitions.map(async (it) => em.persistAndFlush(it)));
+    }
 }

backend/src/entities/assignments/assignment.entity.ts

@@ -14,7 +14,7 @@ export class Assignment {
     })
     within!: Class;
 
-    @PrimaryKey({ type: 'number', autoincrement: true })
+    @PrimaryKey({ type: 'integer', autoincrement: true })
     id?: number;
 
     @Property({ type: 'string' })
@@ -35,5 +35,5 @@ export class Assignment {
         entity: () => Group,
         mappedBy: 'assignment',
     })
-    groups!: Collection<Group>;
+    groups: Collection<Group> = new Collection<Group>(this);
 }

backend/src/entities/assignments/group.entity.ts

@@ -7,17 +7,23 @@ import { GroupRepository } from '../../data/assignments/group-repository.js';
     repository: () => GroupRepository,
 })
 export class Group {
+    /*
+     WARNING: Don't move the definition of groupNumber! If it does not come before the definition of assignment,
+     creating groups fails because of a MikroORM bug!
+     */
+    @PrimaryKey({ type: 'integer', autoincrement: true })
+    groupNumber?: number;
+
     @ManyToOne({
         entity: () => Assignment,
         primary: true,
     })
     assignment!: Assignment;
 
-    @PrimaryKey({ type: 'integer', autoincrement: true })
-    groupNumber?: number;
-
     @ManyToMany({
         entity: () => Student,
+        owner: true,
+        inversedBy: 'groups',
     })
-    members!: Collection<Student>;
+    members: Collection<Student> = new Collection<Student>(this);
 }

backend/src/entities/assignments/submission.entity.ts

@@ -6,6 +6,9 @@ import { Language } from '@dwengo-1/common/util/language';
 
 @Entity({ repository: () => SubmissionRepository })
 export class Submission {
+    @PrimaryKey({ type: 'integer', autoincrement: true })
+    submissionNumber?: number;
+
     @PrimaryKey({ type: 'string' })
     learningObjectHruid!: string;
 
@@ -15,12 +18,9 @@ export class Submission {
     })
     learningObjectLanguage!: Language;
 
-    @PrimaryKey({ type: 'numeric' })
+    @PrimaryKey({ type: 'numeric', autoincrement: false })
     learningObjectVersion = 1;
 
-    @PrimaryKey({ type: 'integer', autoincrement: true })
-    submissionNumber?: number;
-
     @ManyToOne({
         entity: () => Group,
     })

backend/src/entities/classes/class-join-request.entity.ts

@@ -2,7 +2,7 @@ import { Entity, Enum, ManyToOne } from '@mikro-orm/core';
 import { Student } from '../users/student.entity.js';
 import { Class } from './class.entity.js';
 import { ClassJoinRequestRepository } from '../../data/classes/class-join-request-repository.js';
-import { ClassJoinRequestStatus } from '@dwengo-1/common/util/class-join-request';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 @Entity({
     repository: () => ClassJoinRequestRepository,
@@ -20,6 +20,6 @@ export class ClassJoinRequest {
     })
     class!: Class;
 
-    @Enum(() => ClassJoinRequestStatus)
-    status!: ClassJoinRequestStatus;
+    @Enum(() => ClassStatus)
+    status!: ClassStatus;
 }

backend/src/entities/classes/class.entity.ts

@@ -14,9 +14,9 @@ export class Class {
     @Property({ type: 'string' })
     displayName!: string;
 
-    @ManyToMany(() => Teacher)
+    @ManyToMany({ entity: () => Teacher, owner: true, inversedBy: 'classes' })
     teachers!: Collection<Teacher>;
 
-    @ManyToMany(() => Student)
+    @ManyToMany({ entity: () => Student, owner: true, inversedBy: 'classes' })
     students!: Collection<Student>;
 }

backend/src/entities/classes/teacher-invitation.entity.ts

@@ -1,7 +1,8 @@
-import { Entity, ManyToOne } from '@mikro-orm/core';
+import { Entity, Enum, ManyToOne } from '@mikro-orm/core';
 import { Teacher } from '../users/teacher.entity.js';
 import { Class } from './class.entity.js';
 import { TeacherInvitationRepository } from '../../data/classes/teacher-invitation-repository.js';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 /**
  * Invitation of a teacher into a class (in order to teach it).
@@ -25,4 +26,7 @@ export class TeacherInvitation {
         primary: true,
     })
     class!: Class;
+
+    @Enum(() => ClassStatus)
+    status!: ClassStatus;
 }

backend/src/entities/content/learning-object.entity.ts

@@ -1,4 +1,4 @@
-import { Embedded, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
+import { ArrayType, Embedded, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Attachment } from './attachment.entity.js';
 import { Teacher } from '../users/teacher.entity.js';
 import { DwengoContentType } from '../../services/learning-objects/processing/content-type.js';
@@ -42,7 +42,7 @@ export class LearningObject {
     @Property({ type: 'array' })
     keywords: string[] = [];
 
-    @Property({ type: 'array', nullable: true })
+    @Property({ type: new ArrayType((i) => Number(i)), nullable: true })
     targetAges?: number[] = [];
 
     @Property({ type: 'bool' })

backend/src/entities/content/learning-path-node.entity.ts

@@ -1,16 +1,16 @@
-import { Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property, Rel } from '@mikro-orm/core';
+import { Collection, Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property, Rel } from '@mikro-orm/core';
 import { LearningPath } from './learning-path.entity.js';
 import { LearningPathTransition } from './learning-path-transition.entity.js';
 import { Language } from '@dwengo-1/common/util/language';
 
 @Entity()
 export class LearningPathNode {
+    @PrimaryKey({ type: 'integer', autoincrement: true })
+    nodeNumber?: number;
+
     @ManyToOne({ entity: () => LearningPath, primary: true })
     learningPath!: Rel<LearningPath>;
 
-    @PrimaryKey({ type: 'integer', autoincrement: true })
-    nodeNumber!: number;
-
     @Property({ type: 'string' })
     learningObjectHruid!: string;
 
@@ -27,7 +27,7 @@ export class LearningPathNode {
     startNode!: boolean;
 
     @OneToMany({ entity: () => LearningPathTransition, mappedBy: 'node' })
-    transitions: LearningPathTransition[] = [];
+    transitions!: Collection<LearningPathTransition>;
 
     @Property({ length: 3 })
     createdAt: Date = new Date();

backend/src/entities/content/learning-path-transition.entity.ts

@@ -3,12 +3,12 @@ import { LearningPathNode } from './learning-path-node.entity.js';
 
 @Entity()
 export class LearningPathTransition {
-    @ManyToOne({ entity: () => LearningPathNode, primary: true })
-    node!: Rel<LearningPathNode>;
-
     @PrimaryKey({ type: 'numeric' })
     transitionNumber!: number;
 
+    @ManyToOne({ entity: () => LearningPathNode, primary: true })
+    node!: Rel<LearningPathNode>;
+
     @Property({ type: 'string' })
     condition!: string;
 

backend/src/entities/content/learning-path.entity.ts

@@ -1,4 +1,4 @@
-import { Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
+import { Collection, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Teacher } from '../users/teacher.entity.js';
 import { LearningPathRepository } from '../../data/content/learning-path-repository.js';
 import { LearningPathNode } from './learning-path-node.entity.js';
@@ -25,5 +25,5 @@ export class LearningPath {
     image: Buffer | null = null;
 
     @OneToMany({ entity: () => LearningPathNode, mappedBy: 'learningPath' })
-    nodes: LearningPathNode[] = [];
+    nodes: Collection<LearningPathNode> = new Collection<LearningPathNode>(this);
 }

backend/src/entities/users/student.entity.ts

@@ -8,9 +8,9 @@ import { StudentRepository } from '../../data/users/student-repository.js';
     repository: () => StudentRepository,
 })
 export class Student extends User {
-    @ManyToMany(() => Class)
+    @ManyToMany({ entity: () => Class, mappedBy: 'students' })
     classes!: Collection<Class>;
 
-    @ManyToMany(() => Group)
-    groups!: Collection<Group>;
+    @ManyToMany({ entity: () => Group, mappedBy: 'members' })
+    groups: Collection<Group> = new Collection<Group>(this);
 }

backend/src/entities/users/teacher.entity.ts

@@ -5,6 +5,6 @@ import { TeacherRepository } from '../../data/users/teacher-repository.js';
 
 @Entity({ repository: () => TeacherRepository })
 export class Teacher extends User {
-    @ManyToMany(() => Class)
+    @ManyToMany({ entity: () => Class, mappedBy: 'teachers' })
     classes!: Collection<Class>;
 }

backend/src/exceptions/exception-with-http-state.ts

@@ -1,7 +1,9 @@
+import { HasStatusCode } from './has-status-code';
+
 /**
  * Exceptions which are associated with a HTTP error code.
  */
-export abstract class ExceptionWithHttpState extends Error {
+export abstract class ExceptionWithHttpState extends Error implements HasStatusCode {
     constructor(
         public status: number,
         public error: string

backend/src/exceptions/has-status-code.ts

@@ -0,0 +1,6 @@
+export interface HasStatusCode {
+    status: number;
+}
+export function hasStatusCode(err: unknown): err is HasStatusCode {
+    return typeof err === 'object' && err !== null && 'status' in err && typeof (err as HasStatusCode)?.status === 'number';
+}

backend/src/exceptions/server-error-exception.ts

@@ -0,0 +1,12 @@
+import { ExceptionWithHttpState } from './exception-with-http-state.js';
+
+/**
+ * Exception for HTTP 500 Internal Server Error
+ */
+export class ServerErrorException extends ExceptionWithHttpState {
+    status = 500;
+
+    constructor(message = 'Internal server error, something went wrong') {
+        super(500, message);
+    }
+}

backend/src/interfaces/assignment.ts

@@ -1,18 +1,14 @@
 import { languageMap } from '@dwengo-1/common/util/language';
-import { FALLBACK_LANG } from '../config.js';
 import { Assignment } from '../entities/assignments/assignment.entity.js';
 import { Class } from '../entities/classes/class.entity.js';
-import { getLogger } from '../logging/initalize.js';
-import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
+import { AssignmentDTO, AssignmentDTOId } from '@dwengo-1/common/interfaces/assignment';
+import { mapToGroupDTO } from './group.js';
+import { getAssignmentRepository } from '../data/repositories.js';
 
-export function mapToAssignmentDTOId(assignment: Assignment): AssignmentDTO {
+export function mapToAssignmentDTOId(assignment: Assignment): AssignmentDTOId {
     return {
         id: assignment.id!,
         within: assignment.within.classId!,
-        title: assignment.title,
-        description: assignment.description,
-        learningPath: assignment.learningPathHruid,
-        language: assignment.learningPathLanguage,
     };
 }
 
@@ -24,19 +20,17 @@ export function mapToAssignmentDTO(assignment: Assignment): AssignmentDTO {
         description: assignment.description,
         learningPath: assignment.learningPathHruid,
         language: assignment.learningPathLanguage,
-        // Groups: assignment.groups.map(mapToGroupDTO),
+        groups: assignment.groups.map((group) => mapToGroupDTO(group, assignment.within)),
     };
 }
 
 export function mapToAssignment(assignmentData: AssignmentDTO, cls: Class): Assignment {
-    const assignment = new Assignment();
-    assignment.title = assignmentData.title;
-    assignment.description = assignmentData.description;
-    assignment.learningPathHruid = assignmentData.learningPath;
-    assignment.learningPathLanguage = languageMap[assignmentData.language] || FALLBACK_LANG;
-    assignment.within = cls;
-
-    getLogger().debug(assignment);
-
-    return assignment;
+    return getAssignmentRepository().create({
+        within: cls,
+        title: assignmentData.title,
+        description: assignmentData.description,
+        learningPathHruid: assignmentData.learningPath,
+        learningPathLanguage: languageMap[assignmentData.language],
+        groups: [],
+    });
 }

backend/src/interfaces/group.ts

@@ -1,14 +1,12 @@
 import { Group } from '../entities/assignments/group.entity.js';
 import { mapToAssignment } from './assignment.js';
 import { mapToStudent } from './student.js';
-import { mapToAssignmentDTO } from './assignment.js';
 import { mapToStudentDTO } from './student.js';
-import { GroupDTO } from '@dwengo-1/common/interfaces/group';
+import { GroupDTO, GroupDTOId } from '@dwengo-1/common/interfaces/group';
 import { getGroupRepository } from '../data/repositories.js';
 import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
 import { Class } from '../entities/classes/class.entity.js';
 import { StudentDTO } from '@dwengo-1/common/interfaces/student';
-import { mapToClassDTO } from './class.js';
 
 export function mapToGroup(groupDto: GroupDTO, clazz: Class): Group {
     const assignmentDto = groupDto.assignment as AssignmentDTO;
@@ -20,18 +18,18 @@ export function mapToGroup(groupDto: GroupDTO, clazz: Class): Group {
     });
 }
 
-export function mapToGroupDTO(group: Group): GroupDTO {
+export function mapToGroupDTO(group: Group, cls: Class): GroupDTO {
     return {
-        class: mapToClassDTO(group.assignment.within),
-        assignment: mapToAssignmentDTO(group.assignment),
+        class: cls.classId!,
+        assignment: group.assignment.id!,
         groupNumber: group.groupNumber!,
         members: group.members.map(mapToStudentDTO),
     };
 }
 
-export function mapToGroupDTOId(group: Group): GroupDTO {
+export function mapToGroupDTOId(group: Group, cls: Class): GroupDTOId {
     return {
-        class: group.assignment.within.classId!,
+        class: cls.classId!,
         assignment: group.assignment.id!,
         groupNumber: group.groupNumber!,
     };

backend/src/interfaces/question.ts

@@ -31,7 +31,7 @@ export function mapToQuestionDTO(question: Question): QuestionDTO {
         learningObjectIdentifier,
         sequenceNumber: question.sequenceNumber!,
         author: mapToStudentDTO(question.author),
-        inGroup: mapToGroupDTOId(question.inGroup),
+        inGroup: mapToGroupDTOId(question.inGroup, question.inGroup.assignment?.within),
         timestamp: question.timestamp.toISOString(),
         content: question.content,
     };

backend/src/interfaces/student-request.ts

@@ -4,7 +4,7 @@ import { getClassJoinRequestRepository } from '../data/repositories.js';
 import { Student } from '../entities/users/student.entity.js';
 import { Class } from '../entities/classes/class.entity.js';
 import { ClassJoinRequestDTO } from '@dwengo-1/common/interfaces/class-join-request';
-import { ClassJoinRequestStatus } from '@dwengo-1/common/util/class-join-request';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export function mapToStudentRequestDTO(request: ClassJoinRequest): ClassJoinRequestDTO {
     return {
@@ -18,6 +18,6 @@ export function mapToStudentRequest(student: Student, cls: Class): ClassJoinRequ
     return getClassJoinRequestRepository().create({
         requester: student,
         class: cls,
-        status: ClassJoinRequestStatus.Open,
+        status: ClassStatus.Open,
     });
 }

backend/src/interfaces/submission.ts

@@ -1,5 +1,5 @@
 import { Submission } from '../entities/assignments/submission.entity.js';
-import { mapToGroupDTO } from './group.js';
+import { mapToGroupDTOId } from './group.js';
 import { mapToStudentDTO } from './student.js';
 import { SubmissionDTO, SubmissionDTOId } from '@dwengo-1/common/interfaces/submission';
 import { getSubmissionRepository } from '../data/repositories.js';
@@ -13,11 +13,10 @@ export function mapToSubmissionDTO(submission: Submission): SubmissionDTO {
             language: submission.learningObjectLanguage,
             version: submission.learningObjectVersion,
         },
-
         submissionNumber: submission.submissionNumber,
         submitter: mapToStudentDTO(submission.submitter),
         time: submission.submissionTime,
-        group: mapToGroupDTO(submission.onBehalfOf),
+        group: submission.onBehalfOf ? mapToGroupDTOId(submission.onBehalfOf, submission.onBehalfOf.assignment.within) : undefined,
         content: submission.content,
     };
 }

backend/src/interfaces/teacher-invitation.ts

@@ -1,13 +1,17 @@
 import { TeacherInvitation } from '../entities/classes/teacher-invitation.entity.js';
-import { mapToClassDTO } from './class.js';
 import { mapToUserDTO } from './user.js';
 import { TeacherInvitationDTO } from '@dwengo-1/common/interfaces/teacher-invitation';
+import { getTeacherInvitationRepository } from '../data/repositories.js';
+import { Teacher } from '../entities/users/teacher.entity.js';
+import { Class } from '../entities/classes/class.entity.js';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export function mapToTeacherInvitationDTO(invitation: TeacherInvitation): TeacherInvitationDTO {
     return {
         sender: mapToUserDTO(invitation.sender),
         receiver: mapToUserDTO(invitation.receiver),
-        class: mapToClassDTO(invitation.class),
+        classId: invitation.class.classId!,
+        status: invitation.status,
     };
 }
 
@@ -15,6 +19,16 @@ export function mapToTeacherInvitationDTOIds(invitation: TeacherInvitation): Tea
     return {
         sender: invitation.sender.username,
         receiver: invitation.receiver.username,
-        class: invitation.class.classId!,
+        classId: invitation.class.classId!,
+        status: invitation.status,
     };
 }
+
+export function mapToInvitation(sender: Teacher, receiver: Teacher, cls: Class): TeacherInvitation {
+    return getTeacherInvitationRepository().create({
+        sender,
+        receiver,
+        class: cls,
+        status: ClassStatus.Open,
+    });
+}

backend/src/logging/initalize.ts

@@ -26,13 +26,15 @@ function initializeLogger(): Logger {
 
     const consoleTransport = new transports.Console({
         level: getEnvVar(envVars.LogLevel),
-        format: format.combine(format.cli(), format.colorize()),
+        format: format.combine(format.cli(), format.simple()),
     });
 
     if (getEnvVar(envVars.RunMode) === 'dev') {
-        return createLogger({
+        logger = createLogger({
             transports: [consoleTransport],
         });
+        logger.debug(`Logger initialized with level ${logLevel} to console`);
+        return logger;
     }
 
     const lokiHost = getEnvVar(envVars.LokiHost);

backend/src/logging/mikroOrmLogger.ts

@@ -11,7 +11,7 @@ export class MikroOrmLogger extends DefaultLogger {
         };
 
         let message: string;
-        if (context?.label) {
+        if (context !== undefined && context.labels !== undefined) {
             message = `[${namespace}] (${context.label}) ${messageArg}`;
         } else {
             message = `[${namespace}] ${messageArg}`;

backend/src/middleware/auth/auth.ts

@@ -48,14 +48,14 @@ const idpConfigs = {
 const verifyJwtToken = expressjwt({
     secret: async (_: express.Request, token: jwt.Jwt | undefined) => {
         if (!token?.payload || !(token.payload as JwtPayload).iss) {
-            throw new Error('Invalid token');
+            throw new UnauthorizedException('Invalid token.');
         }
 
         const issuer = (token.payload as JwtPayload).iss;
 
         const idpConfig = Object.values(idpConfigs).find((config) => config.issuer === issuer);
         if (!idpConfig) {
-            throw new Error('Issuer not accepted.');
+            throw new UnauthorizedException('Issuer not accepted.');
         }
 
         const signingKey = await idpConfig.jwksClient.getSigningKey(token.header.kid);

backend/src/middleware/error-handling/error-handler.ts

@@ -1,15 +1,15 @@
 import { NextFunction, Request, Response } from 'express';
 import { getLogger, Logger } from '../../logging/initalize.js';
-import { ExceptionWithHttpState } from '../../exceptions/exception-with-http-state.js';
+import { hasStatusCode } from '../../exceptions/has-status-code.js';
 
 const logger: Logger = getLogger();
 
 export function errorHandler(err: unknown, _req: Request, res: Response, _: NextFunction): void {
-    if (err instanceof ExceptionWithHttpState) {
+    if (hasStatusCode(err)) {
         logger.warn(`An error occurred while handling a request: ${err} (-> HTTP ${err.status})`);
         res.status(err.status).json(err);
     } else {
-        logger.error(`Unexpected error occurred while handing a request: ${JSON.stringify(err)}`);
+        logger.error(`Unexpected error occurred while handing a request: ${(err as { stack: string })?.stack ?? JSON.stringify(err)}`);
         res.status(500).json(err);
     }
 }

backend/src/routes/auth.ts

@@ -1,5 +1,5 @@
 import express from 'express';
-import { getFrontendAuthConfig } from '../controllers/auth.js';
+import { getFrontendAuthConfig, postHelloHandler } from '../controllers/auth.js';
 import { authenticatedOnly, studentsOnly, teachersOnly } from '../middleware/auth/auth.js';
 const router = express.Router();
 
@@ -23,4 +23,6 @@ router.get('/testTeachersOnly', teachersOnly, (_req, res) => {
     res.json({ message: 'If you see this, you should be a teacher!' });
 });
 
+router.post('/hello', authenticatedOnly, postHelloHandler);
+
 export default router;

backend/src/routes/submissions.ts

@@ -5,7 +5,7 @@ const router = express.Router({ mergeParams: true });
 // Root endpoint used to search objects
 router.get('/', getSubmissionsHandler);
 
-router.post('/:id', createSubmissionHandler);
+router.post('/', createSubmissionHandler);
 
 // Information about an submission with id 'id'
 router.get('/:id', getSubmissionHandler);

backend/src/routes/teacher-invitations.ts

@@ -0,0 +1,22 @@
+import express from 'express';
+import {
+    createInvitationHandler,
+    deleteInvitationHandler,
+    getAllInvitationsHandler,
+    getInvitationHandler,
+    updateInvitationHandler,
+} from '../controllers/teacher-invitations.js';
+
+const router = express.Router({ mergeParams: true });
+
+router.get('/:username', getAllInvitationsHandler);
+
+router.get('/:sender/:receiver/:classId', getInvitationHandler);
+
+router.post('/', createInvitationHandler);
+
+router.put('/', updateInvitationHandler);
+
+router.delete('/:sender/:receiver/:classId', deleteInvitationHandler);
+
+export default router;

backend/src/routes/teachers.ts

@@ -10,6 +10,8 @@ import {
     getTeacherStudentHandler,
     updateStudentJoinRequestHandler,
 } from '../controllers/teachers.js';
+import invitationRouter from './teacher-invitations.js';
+
 const router = express.Router();
 
 // Root endpoint used to search objects
@@ -32,10 +34,6 @@ router.get('/:username/joinRequests/:classId', getStudentJoinRequestHandler);
 router.put('/:username/joinRequests/:classId/:studentUsername', updateStudentJoinRequestHandler);
 
 // Invitations to other classes a teacher received
-router.get('/:id/invitations', (_req, res) => {
-    res.json({
-        invitations: ['0'],
-    });
-});
+router.use('/invitations', invitationRouter);
 
 export default router;

backend/src/services/assignments.ts

@@ -1,4 +1,4 @@
-import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
+import { AssignmentDTO, AssignmentDTOId } from '@dwengo-1/common/interfaces/assignment';
 import {
     getAssignmentRepository,
     getClassRepository,
@@ -16,6 +16,8 @@ import { QuestionDTO, QuestionId } from '@dwengo-1/common/interfaces/question';
 import { SubmissionDTO, SubmissionDTOId } from '@dwengo-1/common/interfaces/submission';
 import { EntityDTO } from '@mikro-orm/core';
 import { putObject } from './service-helper.js';
+import { fetchStudents } from './students.js';
+import { ServerErrorException } from '../exceptions/server-error-exception.js';
 
 export async function fetchAssignment(classid: string, assignmentNumber: number): Promise<Assignment> {
     const classRepository = getClassRepository();
@@ -35,7 +37,7 @@ export async function fetchAssignment(classid: string, assignmentNumber: number)
     return assignment;
 }
 
-export async function getAllAssignments(classid: string, full: boolean): Promise<AssignmentDTO[]> {
+export async function getAllAssignments(classid: string, full: boolean): Promise<AssignmentDTO[] | AssignmentDTOId[]> {
     const cls = await fetchClass(classid);
 
     const assignmentRepository = getAssignmentRepository();
@@ -51,13 +53,39 @@ export async function getAllAssignments(classid: string, full: boolean): Promise
 export async function createAssignment(classid: string, assignmentData: AssignmentDTO): Promise<AssignmentDTO> {
     const cls = await fetchClass(classid);
 
-    const assignment = mapToAssignment(assignmentData, cls);
-
     const assignmentRepository = getAssignmentRepository();
-    const newAssignment = assignmentRepository.create(assignment);
-    await assignmentRepository.save(newAssignment, { preventOverwrite: true });
+    const assignment = mapToAssignment(assignmentData, cls);
+    await assignmentRepository.save(assignment);
 
-    return mapToAssignmentDTO(newAssignment);
+    if (assignmentData.groups) {
+        /*
+        For some reason when trying to add groups, it does not work when using the original assignment variable. 
+        The assignment needs to be refetched in order for it to work.
+        */
+
+        const assignmentCopy = await assignmentRepository.findByClassAndId(cls, assignment.id!);
+
+        if (assignmentCopy === null) {
+            throw new ServerErrorException('Something has gone horribly wrong. Could not find newly added assignment which is needed to add groups.');
+        }
+
+        const groupRepository = getGroupRepository();
+
+        (assignmentData.groups as string[][]).forEach(async (memberUsernames) => {
+            const members = await fetchStudents(memberUsernames);
+
+            const newGroup = groupRepository.create({
+                assignment: assignmentCopy,
+                members: members,
+            });
+            await groupRepository.save(newGroup);
+        });
+    }
+
+    /* Need to refetch the assignment here again such that the groups are added. */
+    const assignmentWithGroups = await fetchAssignment(classid, assignment.id!);
+
+    return mapToAssignmentDTO(assignmentWithGroups);
 }
 
 export async function getAssignment(classid: string, id: number): Promise<AssignmentDTO> {

backend/src/services/groups.ts

@@ -1,13 +1,14 @@
 import { EntityDTO } from '@mikro-orm/core';
-import { getGroupRepository, getStudentRepository, getSubmissionRepository } from '../data/repositories.js';
+import { getGroupRepository, getSubmissionRepository } from '../data/repositories.js';
 import { Group } from '../entities/assignments/group.entity.js';
-import { mapToGroupDTO, mapToShallowGroupDTO } from '../interfaces/group.js';
+import { mapToGroupDTO, mapToGroupDTOId } from '../interfaces/group.js';
 import { mapToSubmissionDTO, mapToSubmissionDTOId } from '../interfaces/submission.js';
-import { GroupDTO } from '@dwengo-1/common/interfaces/group';
+import { GroupDTO, GroupDTOId } from '@dwengo-1/common/interfaces/group';
 import { SubmissionDTO, SubmissionDTOId } from '@dwengo-1/common/interfaces/submission';
 import { fetchAssignment } from './assignments.js';
 import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { putObject } from './service-helper.js';
+import { fetchStudents } from './students.js';
 
 export async function fetchGroup(classId: string, assignmentNumber: number, groupNumber: number): Promise<Group> {
     const assignment = await fetchAssignment(classId, assignmentNumber);
@@ -24,7 +25,7 @@ export async function fetchGroup(classId: string, assignmentNumber: number, grou
 
 export async function getGroup(classId: string, assignmentNumber: number, groupNumber: number): Promise<GroupDTO> {
     const group = await fetchGroup(classId, assignmentNumber, groupNumber);
-    return mapToGroupDTO(group);
+    return mapToGroupDTO(group, group.assignment.within);
 }
 
 export async function putGroup(
@@ -37,7 +38,7 @@ export async function putGroup(
 
     await putObject<Group>(group, groupData, getGroupRepository());
 
-    return mapToGroupDTO(group);
+    return mapToGroupDTO(group, group.assignment.within);
 }
 
 export async function deleteGroup(classId: string, assignmentNumber: number, groupNumber: number): Promise<GroupDTO> {
@@ -47,7 +48,7 @@ export async function deleteGroup(classId: string, assignmentNumber: number, gro
     const groupRepository = getGroupRepository();
     await groupRepository.deleteByAssignmentAndGroupNumber(assignment, groupNumber);
 
-    return mapToGroupDTO(group);
+    return mapToGroupDTO(group, assignment.within);
 }
 
 export async function getExistingGroupFromGroupDTO(groupData: GroupDTO): Promise<Group> {
@@ -59,12 +60,8 @@ export async function getExistingGroupFromGroupDTO(groupData: GroupDTO): Promise
 }
 
 export async function createGroup(groupData: GroupDTO, classid: string, assignmentNumber: number): Promise<GroupDTO> {
-    const studentRepository = getStudentRepository();
-
     const memberUsernames = (groupData.members as string[]) || [];
-    const members = (await Promise.all([...memberUsernames].map(async (id) => studentRepository.findByUsername(id)))).filter(
-        (student) => student !== null
-    );
+    const members = await fetchStudents(memberUsernames);
 
     const assignment = await fetchAssignment(classid, assignmentNumber);
 
@@ -73,22 +70,23 @@ export async function createGroup(groupData: GroupDTO, classid: string, assignme
         assignment: assignment,
         members: members,
     });
+
     await groupRepository.save(newGroup);
 
-    return mapToGroupDTO(newGroup);
+    return mapToGroupDTO(newGroup, newGroup.assignment.within);
 }
 
-export async function getAllGroups(classId: string, assignmentNumber: number, full: boolean): Promise<GroupDTO[]> {
+export async function getAllGroups(classId: string, assignmentNumber: number, full: boolean): Promise<GroupDTO[] | GroupDTOId[]> {
     const assignment = await fetchAssignment(classId, assignmentNumber);
 
     const groupRepository = getGroupRepository();
     const groups = await groupRepository.findAllGroupsForAssignment(assignment);
 
     if (full) {
-        return groups.map(mapToGroupDTO);
+        return groups.map((group) => mapToGroupDTO(group, assignment.within));
     }
 
-    return groups.map(mapToShallowGroupDTO);
+    return groups.map((group) => mapToGroupDTOId(group, assignment.within));
 }
 
 export async function getGroupSubmissions(

backend/src/services/learning-objects.ts

@@ -8,12 +8,13 @@ import {
     LearningPathResponse,
 } from '@dwengo-1/common/interfaces/learning-content';
 import { getLogger } from '../logging/initalize.js';
+import { v4 } from 'uuid';
 
 function filterData(data: LearningObjectMetadata, htmlUrl: string): FilteredLearningObject {
     return {
         key: data.hruid, // Hruid learningObject (not path)
         _id: data._id,
-        uuid: data.uuid,
+        uuid: data.uuid || v4(),
         version: data.version,
         title: data.title,
         htmlUrl, // Url to fetch html content

backend/src/services/learning-objects/database-learning-object-provider.ts

@@ -32,7 +32,7 @@ function convertLearningObject(learningObject: LearningObject | null): FilteredL
         educationalGoals: learningObject.educationalGoals,
         returnValue: {
             callback_url: learningObject.returnValue.callbackUrl,
-            callback_schema: JSON.parse(learningObject.returnValue.callbackSchema),
+            callback_schema: learningObject.returnValue.callbackSchema === '' ? '' : JSON.parse(learningObject.returnValue.callbackSchema),
         },
         skosConcepts: learningObject.skosConcepts,
         targetAges: learningObject.targetAges || [],

backend/src/services/learning-objects/dwengo-api-learning-object-provider.ts

@@ -11,6 +11,7 @@ import {
     LearningPathIdentifier,
     LearningPathResponse,
 } from '@dwengo-1/common/interfaces/learning-content';
+import { v4 } from 'uuid';
 
 const logger: Logger = getLogger();
 
@@ -23,7 +24,7 @@ function filterData(data: LearningObjectMetadata): FilteredLearningObject {
     return {
         key: data.hruid, // Hruid learningObject (not path)
         _id: data._id,
-        uuid: data.uuid,
+        uuid: data.uuid ?? v4(),
         version: data.version,
         title: data.title,
         htmlUrl: `/learningObject/${data.hruid}/html?language=${data.language}&version=${data.version}`, // Url to fetch html content

backend/src/services/learning-objects/processing/gift/gift-processor.ts

@@ -38,7 +38,7 @@ class GiftProcessor extends StringProcessor {
         let html = "<div class='learning-object-gift'>\n";
         let i = 1;
         for (const question of quizQuestions) {
-            html += `    <div class='gift-question' id='gift-q${i}'>\n`;
+            html += `    <div class='gift-question gift-question-type-${question.type}' id='gift-q${i}'>\n`;
             html += '        ' + this.renderQuestion(question, i).replaceAll(/\n(.+)/g, '\n        $1'); // Replace for indentation.
             html += `    </div>\n`;
             i++;

backend/src/services/learning-objects/processing/gift/question-renderers/multiple-choice-question-renderer.ts

@@ -14,7 +14,7 @@ export class MultipleChoiceQuestionRenderer extends GIFTQuestionRenderer<Multipl
         for (const choice of question.choices) {
             renderedHtml += `<div class="gift-choice-div">\n`;
             renderedHtml += `    <input type='radio' id='gift-q${questionNumber}-choice-${i}' name='gift-q${questionNumber}-choices' value="${i}"/>\n`;
-            renderedHtml += `    <label for='gift-q${questionNumber}-choice-${i}'>${choice.text}</label>\n`;
+            renderedHtml += `    <label for='gift-q${questionNumber}-choice-${i}'>${choice.text.text}</label>\n`;
             renderedHtml += `</div>\n`;
             i++;
         }

backend/src/services/learning-paths/database-learning-path-provider.ts

@@ -4,7 +4,7 @@ import { getLearningPathRepository } from '../../data/repositories.js';
 import learningObjectService from '../learning-objects/learning-object-service.js';
 import { LearningPathNode } from '../../entities/content/learning-path-node.entity.js';
 import { LearningPathTransition } from '../../entities/content/learning-path-transition.entity.js';
-import { getLastSubmissionForCustomizationTarget, isTransitionPossible, PersonalizationTarget } from './learning-path-personalization-util.js';
+import { getLastSubmissionForGroup, isTransitionPossible } from './learning-path-personalization-util.js';
 import {
     FilteredLearningObject,
     LearningObjectNode,
@@ -13,13 +13,16 @@ import {
     Transition,
 } from '@dwengo-1/common/interfaces/learning-content';
 import { Language } from '@dwengo-1/common/util/language';
+import { Group } from '../../entities/assignments/group.entity';
+import { Collection } from '@mikro-orm/core';
+import { v4 } from 'uuid';
 
 /**
  * Fetches the corresponding learning object for each of the nodes and creates a map that maps each node to its
  * corresponding learning object.
  * @param nodes The nodes to find the learning object for.
  */
-async function getLearningObjectsForNodes(nodes: LearningPathNode[]): Promise<Map<LearningPathNode, FilteredLearningObject>> {
+async function getLearningObjectsForNodes(nodes: Collection<LearningPathNode>): Promise<Map<LearningPathNode, FilteredLearningObject>> {
     // Fetching the corresponding learning object for each of the nodes and creating a map that maps each node to
     // Its corresponding learning object.
     const nullableNodesToLearningObjects = new Map<LearningPathNode, FilteredLearningObject | null>(
@@ -44,7 +47,7 @@ async function getLearningObjectsForNodes(nodes: LearningPathNode[]): Promise<Ma
 /**
  * Convert the given learning path entity to an object which conforms to the learning path content.
  */
-async function convertLearningPath(learningPath: LearningPathEntity, order: number, personalizedFor?: PersonalizationTarget): Promise<LearningPath> {
+async function convertLearningPath(learningPath: LearningPathEntity, order: number, personalizedFor?: Group): Promise<LearningPath> {
     // Fetch the corresponding learning object for each node since some parts of the expected response contains parts
     // With information which is not available in the LearningPathNodes themselves.
     const nodesToLearningObjects: Map<LearningPathNode, FilteredLearningObject> = await getLearningObjectsForNodes(learningPath.nodes);
@@ -89,10 +92,10 @@ async function convertLearningPath(learningPath: LearningPathEntity, order: numb
 async function convertNode(
     node: LearningPathNode,
     learningObject: FilteredLearningObject,
-    personalizedFor: PersonalizationTarget | undefined,
+    personalizedFor: Group | undefined,
     nodesToLearningObjects: Map<LearningPathNode, FilteredLearningObject>
 ): Promise<LearningObjectNode> {
-    const lastSubmission = personalizedFor ? await getLastSubmissionForCustomizationTarget(node, personalizedFor) : null;
+    const lastSubmission = personalizedFor ? await getLastSubmissionForGroup(node, personalizedFor) : null;
     const transitions = node.transitions
         .filter(
             (trans) =>
@@ -108,6 +111,7 @@ async function convertNode(
         updatedAt: node.updatedAt.toISOString(),
         learningobject_hruid: node.learningObjectHruid,
         version: learningObject.version,
+        done: personalizedFor ? lastSubmission !== null : undefined,
         transitions,
     };
 }
@@ -121,7 +125,7 @@ async function convertNode(
  */
 async function convertNodes(
     nodesToLearningObjects: Map<LearningPathNode, FilteredLearningObject>,
-    personalizedFor?: PersonalizationTarget
+    personalizedFor?: Group
 ): Promise<LearningObjectNode[]> {
     const nodesPromise = Array.from(nodesToLearningObjects.entries()).map(async (entry) =>
         convertNode(entry[0], entry[1], personalizedFor, nodesToLearningObjects)
@@ -161,7 +165,7 @@ function convertTransition(
             _id: String(index), // Retained for backwards compatibility. The index uniquely identifies the transition within the learning path.
             default: false, // We don't work with default transitions but retain this for backwards compatibility.
             next: {
-                _id: nextNode._id + index, // Construct a unique ID for the transition for backwards compatibility.
+                _id: nextNode._id ? nextNode._id + index : v4(), // Construct a unique ID for the transition for backwards compatibility.
                 hruid: transition.next.learningObjectHruid,
                 language: nextNode.language,
                 version: nextNode.version,
@@ -177,12 +181,7 @@ const databaseLearningPathProvider: LearningPathProvider = {
     /**
      * Fetch the learning paths with the given hruids from the database.
      */
-    async fetchLearningPaths(
-        hruids: string[],
-        language: Language,
-        source: string,
-        personalizedFor?: PersonalizationTarget
-    ): Promise<LearningPathResponse> {
+    async fetchLearningPaths(hruids: string[], language: Language, source: string, personalizedFor?: Group): Promise<LearningPathResponse> {
         const learningPathRepo = getLearningPathRepository();
 
         const learningPaths = (await Promise.all(hruids.map(async (hruid) => learningPathRepo.findByHruidAndLanguage(hruid, language)))).filter(
@@ -202,7 +201,7 @@ const databaseLearningPathProvider: LearningPathProvider = {
     /**
      * Search learning paths in the database using the given search string.
      */
-    async searchLearningPaths(query: string, language: Language, personalizedFor?: PersonalizationTarget): Promise<LearningPath[]> {
+    async searchLearningPaths(query: string, language: Language, personalizedFor?: Group): Promise<LearningPath[]> {
         const learningPathRepo = getLearningPathRepository();
 
         const searchResults = await learningPathRepo.findByQueryStringAndLanguage(query, language);

backend/src/services/learning-paths/learning-path-personalization-util.ts

@@ -1,76 +1,22 @@
 import { LearningPathNode } from '../../entities/content/learning-path-node.entity.js';
-import { Student } from '../../entities/users/student.entity.js';
 import { Group } from '../../entities/assignments/group.entity.js';
 import { Submission } from '../../entities/assignments/submission.entity.js';
-import { getClassRepository, getGroupRepository, getStudentRepository, getSubmissionRepository } from '../../data/repositories.js';
+import { getSubmissionRepository } from '../../data/repositories.js';
 import { LearningObjectIdentifier } from '../../entities/content/learning-object-identifier.js';
 import { LearningPathTransition } from '../../entities/content/learning-path-transition.entity.js';
 import { JSONPath } from 'jsonpath-plus';
 
-export type PersonalizationTarget = { type: 'student'; student: Student } | { type: 'group'; group: Group };
-
 /**
- * Shortcut function to easily create a PersonalizationTarget object for a student by his/her username.
- * @param username Username of the student we want to generate a personalized learning path for.
- *                 If there is no student with this username, return undefined.
+ * Returns the last submission for the learning object associated with the given node and for the group
  */
-export async function personalizedForStudent(username: string): Promise<PersonalizationTarget | undefined> {
-    const student = await getStudentRepository().findByUsername(username);
-    if (student) {
-        return {
-            type: 'student',
-            student: student,
-        };
-    }
-    return undefined;
-}
-
-/**
- * Shortcut function to easily create a PersonalizationTarget object for a group by class name, assignment number and
- * group number.
- * @param classId Id of the class in which this group was created
- * @param assignmentNumber Number of the assignment for which this group was created
- * @param groupNumber Number of the group for which we want to personalize the learning path.
- */
-export async function personalizedForGroup(
-    classId: string,
-    assignmentNumber: number,
-    groupNumber: number
-): Promise<PersonalizationTarget | undefined> {
-    const clazz = await getClassRepository().findById(classId);
-    if (!clazz) {
-        return undefined;
-    }
-    const group = await getGroupRepository().findOne({
-        assignment: {
-            within: clazz,
-            id: assignmentNumber,
-        },
-        groupNumber: groupNumber,
-    });
-    if (group) {
-        return {
-            type: 'group',
-            group: group,
-        };
-    }
-    return undefined;
-}
-
-/**
- * Returns the last submission for the learning object associated with the given node and for the student or group
- */
-export async function getLastSubmissionForCustomizationTarget(node: LearningPathNode, pathFor: PersonalizationTarget): Promise<Submission | null> {
+export async function getLastSubmissionForGroup(node: LearningPathNode, pathFor: Group): Promise<Submission | null> {
     const submissionRepo = getSubmissionRepository();
     const learningObjectId: LearningObjectIdentifier = {
         hruid: node.learningObjectHruid,
         language: node.language,
         version: node.version,
     };
-    if (pathFor.type === 'group') {
-        return await submissionRepo.findMostRecentSubmissionForGroup(learningObjectId, pathFor.group);
-    }
-    return await submissionRepo.findMostRecentSubmissionForStudent(learningObjectId, pathFor.student);
+    return await submissionRepo.findMostRecentSubmissionForGroup(learningObjectId, pathFor);
 }
 
 /**

backend/src/services/learning-paths/learning-path-provider.ts

@@ -1,6 +1,6 @@
 import { LearningPath, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
-import { PersonalizationTarget } from './learning-path-personalization-util.js';
 import { Language } from '@dwengo-1/common/util/language';
+import { Group } from '../../entities/assignments/group.entity';
 
 /**
  * Generic interface for a service which provides access to learning paths from a data source.
@@ -9,10 +9,10 @@ export interface LearningPathProvider {
     /**
      * Fetch the learning paths with the given hruids from the data source.
      */
-    fetchLearningPaths(hruids: string[], language: Language, source: string, personalizedFor?: PersonalizationTarget): Promise<LearningPathResponse>;
+    fetchLearningPaths(hruids: string[], language: Language, source: string, personalizedFor?: Group): Promise<LearningPathResponse>;
 
     /**
      * Search learning paths in the data source using the given search string.
      */
-    searchLearningPaths(query: string, language: Language, personalizedFor?: PersonalizationTarget): Promise<LearningPath[]>;
+    searchLearningPaths(query: string, language: Language, personalizedFor?: Group): Promise<LearningPath[]>;
 }

backend/src/services/learning-paths/learning-path-service.ts

@@ -1,13 +1,78 @@
 import dwengoApiLearningPathProvider from './dwengo-api-learning-path-provider.js';
 import databaseLearningPathProvider from './database-learning-path-provider.js';
 import { envVars, getEnvVar } from '../../util/envVars.js';
-import { PersonalizationTarget } from './learning-path-personalization-util.js';
-import { LearningPath, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
+import { LearningObjectNode, LearningPath, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
 import { Language } from '@dwengo-1/common/util/language';
+import { Group } from '../../entities/assignments/group.entity.js';
+import { LearningPath as LearningPathEntity } from '../../entities/content/learning-path.entity.js';
+import { getLearningPathRepository } from '../../data/repositories.js';
+import { LearningPathNode } from '../../entities/content/learning-path-node.entity.js';
+import { LearningPathTransition } from '../../entities/content/learning-path-transition.entity.js';
+import { base64ToArrayBuffer } from '../../util/base64-buffer-conversion.js';
+import { TeacherDTO } from '@dwengo-1/common/interfaces/teacher';
+import { mapToTeacher } from '../../interfaces/teacher.js';
+import { Collection } from '@mikro-orm/core';
 
 const userContentPrefix = getEnvVar(envVars.UserContentPrefix);
 const allProviders = [dwengoApiLearningPathProvider, databaseLearningPathProvider];
 
+export function mapToLearningPath(dto: LearningPath, adminsDto: TeacherDTO[]): LearningPathEntity {
+    const admins = adminsDto.map((admin) => mapToTeacher(admin));
+    const repo = getLearningPathRepository();
+    const path = repo.create({
+        hruid: dto.hruid,
+        language: dto.language as Language,
+        description: dto.description,
+        title: dto.title,
+        admins,
+        image: dto.image ? Buffer.from(base64ToArrayBuffer(dto.image)) : null,
+    });
+    const nodes = dto.nodes.map((nodeDto: LearningObjectNode, i: number) =>
+        repo.createNode({
+            learningPath: path,
+            learningObjectHruid: nodeDto.learningobject_hruid,
+            nodeNumber: i,
+            language: nodeDto.language,
+            version: nodeDto.version,
+            startNode: nodeDto.start_node ?? false,
+            createdAt: new Date(),
+            updatedAt: new Date(),
+        })
+    );
+    dto.nodes.forEach((nodeDto) => {
+        const fromNode = nodes.find(
+            (it) => it.learningObjectHruid === nodeDto.learningobject_hruid && it.language === nodeDto.language && it.version === nodeDto.version
+        )!;
+        const transitions = nodeDto.transitions
+            .map((transDto, i) => {
+                const toNode = nodes.find(
+                    (it) =>
+                        it.learningObjectHruid === transDto.next.hruid &&
+                        it.language === transDto.next.language &&
+                        it.version === transDto.next.version
+                );
+
+                if (toNode) {
+                    return repo.createTransition({
+                        transitionNumber: i,
+                        node: fromNode,
+                        next: toNode,
+                        condition: transDto.condition ?? 'true',
+                    });
+                }
+                return undefined;
+            })
+            .filter((it) => it)
+            .map((it) => it!);
+
+        fromNode.transitions = new Collection<LearningPathTransition>(fromNode, transitions);
+    });
+
+    path.nodes = new Collection<LearningPathNode>(path, nodes);
+
+    return path;
+}
+
 /**
  * Service providing access to data about learning paths from the appropriate data source (database or Dwengo-api)
  */
@@ -19,12 +84,7 @@ const learningPathService = {
      * @param source
      * @param personalizedFor If this is set, a learning path personalized for the given group or student will be returned.
      */
-    async fetchLearningPaths(
-        hruids: string[],
-        language: Language,
-        source: string,
-        personalizedFor?: PersonalizationTarget
-    ): Promise<LearningPathResponse> {
+    async fetchLearningPaths(hruids: string[], language: Language, source: string, personalizedFor?: Group): Promise<LearningPathResponse> {
         const userContentHruids = hruids.filter((hruid) => hruid.startsWith(userContentPrefix));
         const nonUserContentHruids = hruids.filter((hruid) => !hruid.startsWith(userContentPrefix));
 
@@ -48,12 +108,23 @@ const learningPathService = {
     /**
      * Search learning paths in the data source using the given search string.
      */
-    async searchLearningPaths(query: string, language: Language, personalizedFor?: PersonalizationTarget): Promise<LearningPath[]> {
+    async searchLearningPaths(query: string, language: Language, personalizedFor?: Group): Promise<LearningPath[]> {
         const providerResponses = await Promise.all(
             allProviders.map(async (provider) => provider.searchLearningPaths(query, language, personalizedFor))
         );
         return providerResponses.flat();
     },
+
+    /**
+     * Add a new learning path to the database.
+     * @param dto Learning path DTO from which the learning path will be created.
+     * @param admins Teachers who should become an admin of the learning path.
+     */
+    async createNewLearningPath(dto: LearningPath, admins: TeacherDTO[]): Promise<void> {
+        const repo = getLearningPathRepository();
+        const path = mapToLearningPath(dto, admins);
+        await repo.save(path, { preventOverwrite: true });
+    },
 };
 
 export default learningPathService;

backend/src/services/students.ts

@@ -7,7 +7,7 @@ import {
     getSubmissionRepository,
 } from '../data/repositories.js';
 import { mapToClassDTO } from '../interfaces/class.js';
-import { mapToGroupDTO, mapToShallowGroupDTO } from '../interfaces/group.js';
+import { mapToGroupDTO, mapToGroupDTOId } from '../interfaces/group.js';
 import { mapToStudent, mapToStudentDTO } from '../interfaces/student.js';
 import { mapToSubmissionDTO, mapToSubmissionDTOId } from '../interfaces/submission.js';
 import { getAllAssignments } from './assignments.js';
@@ -18,8 +18,8 @@ import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { fetchClass } from './classes.js';
 import { StudentDTO } from '@dwengo-1/common/interfaces/student';
 import { ClassDTO } from '@dwengo-1/common/interfaces/class';
-import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
-import { GroupDTO } from '@dwengo-1/common/interfaces/group';
+import { AssignmentDTO, AssignmentDTOId } from '@dwengo-1/common/interfaces/assignment';
+import { GroupDTO, GroupDTOId } from '@dwengo-1/common/interfaces/group';
 import { SubmissionDTO, SubmissionDTOId } from '@dwengo-1/common/interfaces/submission';
 import { QuestionDTO, QuestionId } from '@dwengo-1/common/interfaces/question';
 import { ClassJoinRequestDTO } from '@dwengo-1/common/interfaces/class-join-request';
@@ -48,6 +48,11 @@ export async function fetchStudent(username: string): Promise<Student> {
     return user;
 }
 
+export async function fetchStudents(usernames: string[]): Promise<Student[]> {
+    const members = await Promise.all(usernames.map(async (username) => await fetchStudent(username)));
+    return members;
+}
+
 export async function getStudent(username: string): Promise<StudentDTO> {
     const user = await fetchStudent(username);
     return mapToStudentDTO(user);
@@ -58,6 +63,16 @@ export async function createStudent(userData: StudentDTO): Promise<StudentDTO> {
 
     const newStudent = mapToStudent(userData);
     await studentRepository.save(newStudent, { preventOverwrite: true });
+
+    return userData;
+}
+
+export async function createOrUpdateStudent(userData: StudentDTO): Promise<StudentDTO> {
+    await getStudentRepository().upsert({
+        username: userData.username,
+        firstName: userData.firstName,
+        lastName: userData.lastName,
+    });
     return userData;
 }
 
@@ -83,7 +98,7 @@ export async function getStudentClasses(username: string, full: boolean): Promis
     return classes.map((cls) => cls.classId!);
 }
 
-export async function getStudentAssignments(username: string, full: boolean): Promise<AssignmentDTO[]> {
+export async function getStudentAssignments(username: string, full: boolean): Promise<AssignmentDTO[] | AssignmentDTOId[]> {
     const student = await fetchStudent(username);
 
     const classRepository = getClassRepository();
@@ -92,17 +107,17 @@ export async function getStudentAssignments(username: string, full: boolean): Pr
     return (await Promise.all(classes.map(async (cls) => await getAllAssignments(cls.classId!, full)))).flat();
 }
 
-export async function getStudentGroups(username: string, full: boolean): Promise<GroupDTO[]> {
+export async function getStudentGroups(username: string, full: boolean): Promise<GroupDTO[] | GroupDTOId[]> {
     const student = await fetchStudent(username);
 
     const groupRepository = getGroupRepository();
     const groups = await groupRepository.findAllGroupsWithStudent(student);
 
     if (full) {
-        return groups.map(mapToGroupDTO);
+        return groups.map((group) => mapToGroupDTO(group, group.assignment.within));
     }
 
-    return groups.map(mapToShallowGroupDTO);
+    return groups.map((group) => mapToGroupDTOId(group, group.assignment.within));
 }
 
 export async function getStudentSubmissions(username: string, full: boolean): Promise<SubmissionDTO[] | SubmissionDTOId[]> {

backend/src/services/submissions.ts

@@ -1,4 +1,4 @@
-import { getAssignmentRepository, getSubmissionRepository } from '../data/repositories.js';
+import { getAssignmentRepository, getGroupRepository, getSubmissionRepository } from '../data/repositories.js';
 import { LearningObjectIdentifier } from '../entities/content/learning-object-identifier.js';
 import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { mapToSubmission, mapToSubmissionDTO } from '../interfaces/submission.js';
@@ -33,10 +33,11 @@ export async function getAllSubmissions(loId: LearningObjectIdentifier): Promise
 
 export async function createSubmission(submissionDTO: SubmissionDTO): Promise<SubmissionDTO> {
     const submitter = await fetchStudent(submissionDTO.submitter.username);
-    const group = await getExistingGroupFromGroupDTO(submissionDTO.group);
+    const group = await getExistingGroupFromGroupDTO(submissionDTO.group!);
 
     const submissionRepository = getSubmissionRepository();
     const submission = mapToSubmission(submissionDTO, submitter, group);
+
     await submissionRepository.save(submission);
 
     return mapToSubmissionDTO(submission);
@@ -60,12 +61,18 @@ export async function getSubmissionsForLearningObjectAndAssignment(
     version: number,
     classId: string,
     assignmentId: number,
-    studentUsername?: string
+    groupId?: number
 ): Promise<SubmissionDTO[]> {
     const loId = new LearningObjectIdentifier(learningObjectHruid, language, version);
     const assignment = await getAssignmentRepository().findByClassIdAndAssignmentId(classId, assignmentId);
 
-    const submissions = await getSubmissionRepository().findAllSubmissionsForLearningObjectAndAssignment(loId, assignment!, studentUsername);
+    let submissions: Submission[];
+    if (groupId !== undefined) {
+        const group = await getGroupRepository().findByAssignmentAndGroupNumber(assignment!, groupId);
+        submissions = await getSubmissionRepository().findAllSubmissionsForLearningObjectAndGroup(loId, group!);
+    } else {
+        submissions = await getSubmissionRepository().findAllSubmissionsForLearningObjectAndAssignment(loId, assignment!);
+    }
 
     return submissions.map((s) => mapToSubmissionDTO(s));
 }

backend/src/services/teacher-invitations.ts

@@ -0,0 +1,87 @@
+import { fetchTeacher } from './teachers.js';
+import { getTeacherInvitationRepository } from '../data/repositories.js';
+import { mapToInvitation, mapToTeacherInvitationDTO } from '../interfaces/teacher-invitation.js';
+import { addClassTeacher, fetchClass } from './classes.js';
+import { TeacherInvitationData, TeacherInvitationDTO } from '@dwengo-1/common/interfaces/teacher-invitation';
+import { ConflictException } from '../exceptions/conflict-exception.js';
+import { NotFoundException } from '../exceptions/not-found-exception.js';
+import { TeacherInvitation } from '../entities/classes/teacher-invitation.entity.js';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
+
+export async function getAllInvitations(username: string, sent: boolean): Promise<TeacherInvitationDTO[]> {
+    const teacher = await fetchTeacher(username);
+    const teacherInvitationRepository = getTeacherInvitationRepository();
+
+    let invitations;
+    if (sent) {
+        invitations = await teacherInvitationRepository.findAllInvitationsBy(teacher);
+    } else {
+        invitations = await teacherInvitationRepository.findAllInvitationsFor(teacher);
+    }
+    return invitations.map(mapToTeacherInvitationDTO);
+}
+
+export async function createInvitation(data: TeacherInvitationData): Promise<TeacherInvitationDTO> {
+    const teacherInvitationRepository = getTeacherInvitationRepository();
+    const sender = await fetchTeacher(data.sender);
+    const receiver = await fetchTeacher(data.receiver);
+
+    const cls = await fetchClass(data.class);
+
+    if (!cls.teachers.contains(sender)) {
+        throw new ConflictException('The teacher sending the invite is not part of the class');
+    }
+
+    const newInvitation = mapToInvitation(sender, receiver, cls);
+    await teacherInvitationRepository.save(newInvitation, { preventOverwrite: true });
+
+    return mapToTeacherInvitationDTO(newInvitation);
+}
+
+async function fetchInvitation(usernameSender: string, usernameReceiver: string, classId: string): Promise<TeacherInvitation> {
+    const sender = await fetchTeacher(usernameSender);
+    const receiver = await fetchTeacher(usernameReceiver);
+    const cls = await fetchClass(classId);
+
+    const teacherInvitationRepository = getTeacherInvitationRepository();
+    const invite = await teacherInvitationRepository.findBy(cls, sender, receiver);
+
+    if (!invite) {
+        throw new NotFoundException('Teacher invite not found');
+    }
+
+    return invite;
+}
+
+export async function getInvitation(sender: string, receiver: string, classId: string): Promise<TeacherInvitationDTO> {
+    const invitation = await fetchInvitation(sender, receiver, classId);
+    return mapToTeacherInvitationDTO(invitation);
+}
+
+export async function updateInvitation(data: TeacherInvitationData): Promise<TeacherInvitationDTO> {
+    const invitation = await fetchInvitation(data.sender, data.receiver, data.class);
+    invitation.status = ClassStatus.Declined;
+
+    if (data.accepted) {
+        invitation.status = ClassStatus.Accepted;
+        await addClassTeacher(data.class, data.receiver);
+    }
+
+    const teacherInvitationRepository = getTeacherInvitationRepository();
+    await teacherInvitationRepository.save(invitation);
+
+    return mapToTeacherInvitationDTO(invitation);
+}
+
+export async function deleteInvitation(data: TeacherInvitationData): Promise<TeacherInvitationDTO> {
+    const invitation = await fetchInvitation(data.sender, data.receiver, data.class);
+
+    const sender = await fetchTeacher(data.sender);
+    const receiver = await fetchTeacher(data.receiver);
+    const cls = await fetchClass(data.class);
+
+    const teacherInvitationRepository = getTeacherInvitationRepository();
+    await teacherInvitationRepository.deleteBy(cls, sender, receiver);
+
+    return mapToTeacherInvitationDTO(invitation);
+}

backend/src/services/teachers.ts

@@ -28,7 +28,7 @@ import { ClassDTO } from '@dwengo-1/common/interfaces/class';
 import { StudentDTO } from '@dwengo-1/common/interfaces/student';
 import { QuestionDTO, QuestionId } from '@dwengo-1/common/interfaces/question';
 import { ClassJoinRequestDTO } from '@dwengo-1/common/interfaces/class-join-request';
-import { ClassJoinRequestStatus } from '@dwengo-1/common/util/class-join-request';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 import { ConflictException } from '../exceptions/conflict-exception.js';
 
 export async function getAllTeachers(full: boolean): Promise<TeacherDTO[] | string[]> {
@@ -62,9 +62,19 @@ export async function createTeacher(userData: TeacherDTO): Promise<TeacherDTO> {
 
     const newTeacher = mapToTeacher(userData);
     await teacherRepository.save(newTeacher, { preventOverwrite: true });
+
     return mapToTeacherDTO(newTeacher);
 }
 
+export async function createOrUpdateTeacher(userData: TeacherDTO): Promise<TeacherDTO> {
+    await getTeacherRepository().upsert({
+        username: userData.username,
+        firstName: userData.firstName,
+        lastName: userData.lastName,
+    });
+    return userData;
+}
+
 export async function deleteTeacher(username: string): Promise<TeacherDTO> {
     const teacherRepository: TeacherRepository = getTeacherRepository();
 
@@ -160,10 +170,10 @@ export async function updateClassJoinRequestStatus(studentUsername: string, clas
         throw new NotFoundException('Join request not found');
     }
 
-    request.status = ClassJoinRequestStatus.Declined;
+    request.status = ClassStatus.Declined;
 
     if (accepted) {
-        request.status = ClassJoinRequestStatus.Accepted;
+        request.status = ClassStatus.Accepted;
         await addClassStudent(classId, studentUsername);
     }
 

backend/src/sqlite-autoincrement-workaround.ts

@@ -27,7 +27,7 @@ export class SqliteAutoincrementSubscriber implements EventSubscriber {
 
         for (const prop of Object.values(args.meta.properties)) {
             const property = prop as EntityProperty<T>;
-            if (property.primary && property.autoincrement && !(args.entity as Record<string, unknown>)[property.name]) {
+            if (property.primary && property.autoincrement && (args.entity as Record<string, unknown>)[property.name] === undefined) {
                 // Obtain and increment sequence number of this entity.
                 const propertyKey = args.meta.class.name + '.' + property.name;
                 const nextSeqNumber = this.sequenceNumbersForEntityType.get(propertyKey) || 0;

backend/src/util/base64-buffer-conversion.ts

@@ -0,0 +1,12 @@
+/**
+ * Convert a Base64-encoded string into a buffer with the same data.
+ * @param base64 The Base64 encoded string.
+ */
+export function base64ToArrayBuffer(base64: string): ArrayBuffer {
+    const binaryString = atob(base64);
+    const bytes = new Uint8Array(binaryString.length);
+    for (let i = 0; i < binaryString.length; i++) {
+        bytes[i] = binaryString.charCodeAt(i);
+    }
+    return bytes.buffer;
+}

backend/tests/controllers/teacher-invitations.test.ts

@@ -0,0 +1,123 @@
+import { beforeAll, beforeEach, describe, expect, it, Mock, vi } from 'vitest';
+import { Request, Response } from 'express';
+import { setupTestApp } from '../setup-tests.js';
+import {
+    createInvitationHandler,
+    deleteInvitationHandler,
+    getAllInvitationsHandler,
+    getInvitationHandler,
+    updateInvitationHandler,
+} from '../../src/controllers/teacher-invitations';
+import { TeacherInvitationData } from '@dwengo-1/common/interfaces/teacher-invitation';
+import { getClassHandler } from '../../src/controllers/classes';
+import { BadRequestException } from '../../src/exceptions/bad-request-exception';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
+
+describe('Teacher controllers', () => {
+    let req: Partial<Request>;
+    let res: Partial<Response>;
+
+    let jsonMock: Mock;
+
+    beforeAll(async () => {
+        await setupTestApp();
+    });
+
+    beforeEach(() => {
+        jsonMock = vi.fn();
+        res = {
+            json: jsonMock,
+        };
+    });
+
+    it('Get teacher invitations by', async () => {
+        req = { params: { username: 'LimpBizkit' }, query: { sent: 'true' } };
+
+        await getAllInvitationsHandler(req as Request, res as Response);
+
+        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ invitations: expect.anything() }));
+
+        const result = jsonMock.mock.lastCall?.[0];
+        // Console.log(result.invitations);
+        expect(result.invitations).to.have.length.greaterThan(0);
+    });
+
+    it('Get teacher invitations for', async () => {
+        req = { params: { username: 'FooFighters' }, query: { by: 'false' } };
+
+        await getAllInvitationsHandler(req as Request, res as Response);
+
+        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ invitations: expect.anything() }));
+
+        const result = jsonMock.mock.lastCall?.[0];
+        expect(result.invitations).to.have.length.greaterThan(0);
+    });
+
+    it('Create and delete invitation', async () => {
+        const body = {
+            sender: 'LimpBizkit',
+            receiver: 'testleerkracht1',
+            class: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
+        } as TeacherInvitationData;
+        req = { body };
+
+        await createInvitationHandler(req as Request, res as Response);
+
+        req = {
+            params: {
+                sender: 'LimpBizkit',
+                receiver: 'testleerkracht1',
+                classId: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
+            },
+            body: { accepted: 'false' },
+        };
+
+        await deleteInvitationHandler(req as Request, res as Response);
+    });
+
+    it('Get invitation', async () => {
+        req = {
+            params: {
+                sender: 'LimpBizkit',
+                receiver: 'FooFighters',
+                classId: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
+            },
+        };
+        await getInvitationHandler(req as Request, res as Response);
+
+        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ invitation: expect.anything() }));
+    });
+
+    it('Get invitation error', async () => {
+        req = {
+            params: { no: 'no params' },
+        };
+
+        await expect(async () => getInvitationHandler(req as Request, res as Response)).rejects.toThrowError(BadRequestException);
+    });
+
+    it('Accept invitation', async () => {
+        const body = {
+            sender: 'LimpBizkit',
+            receiver: 'FooFighters',
+            class: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
+        } as TeacherInvitationData;
+        req = { body };
+
+        await updateInvitationHandler(req as Request, res as Response);
+
+        const result1 = jsonMock.mock.lastCall?.[0];
+        expect(result1.invitation.status).toEqual(ClassStatus.Accepted);
+
+        req = {
+            params: {
+                id: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
+            },
+        };
+
+        await getClassHandler(req as Request, res as Response);
+
+        const result = jsonMock.mock.lastCall?.[0];
+        expect(result.class.teachers).toContain('FooFighters');
+    });
+});

backend/tests/data/assignments/assignments.test.ts

@@ -16,7 +16,7 @@ describe('AssignmentRepository', () => {
 
     it('should return the requested assignment', async () => {
         const class_ = await classRepository.findById('34d484a1-295f-4e9f-bfdc-3e7a23d86a89');
-        const assignment = await assignmentRepository.findByClassAndId(class_!, 2);
+        const assignment = await assignmentRepository.findByClassAndId(class_!, 21001);
 
         expect(assignment).toBeTruthy();
         expect(assignment!.title).toBe('tool');
@@ -35,7 +35,7 @@ describe('AssignmentRepository', () => {
         const result = await assignmentRepository.findAllByResponsibleTeacher('testleerkracht1');
         const resultIds = result.map((it) => it.id).sort((a, b) => (a ?? 0) - (b ?? 0));
 
-        expect(resultIds).toEqual([1, 3, 4]);
+        expect(resultIds).toEqual([21000, 21002, 21003, 21004]);
     });
 
     it('should not find removed assignment', async () => {

backend/tests/data/assignments/groups.test.ts

@@ -19,16 +19,16 @@ describe('GroupRepository', () => {
 
     it('should return the requested group', async () => {
         const class_ = await classRepository.findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        const assignment = await assignmentRepository.findByClassAndId(class_!, 1);
+        const assignment = await assignmentRepository.findByClassAndId(class_!, 21000);
 
-        const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 1);
+        const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 21001);
 
         expect(group).toBeTruthy();
     });
 
     it('should return all groups for assignment', async () => {
         const class_ = await classRepository.findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        const assignment = await assignmentRepository.findByClassAndId(class_!, 1);
+        const assignment = await assignmentRepository.findByClassAndId(class_!, 21000);
 
         const groups = await groupRepository.findAllGroupsForAssignment(assignment!);
 
@@ -38,9 +38,9 @@ describe('GroupRepository', () => {
 
     it('should not find removed group', async () => {
         const class_ = await classRepository.findById('34d484a1-295f-4e9f-bfdc-3e7a23d86a89');
-        const assignment = await assignmentRepository.findByClassAndId(class_!, 2);
+        const assignment = await assignmentRepository.findByClassAndId(class_!, 21001);
 
-        await groupRepository.deleteByAssignmentAndGroupNumber(assignment!, 1);
+        await groupRepository.deleteByAssignmentAndGroupNumber(assignment!, 21001);
 
         const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 1);
 

backend/tests/data/assignments/submissions.test.ts

@@ -54,8 +54,8 @@ describe('SubmissionRepository', () => {
     it('should find the most recent submission for a group', async () => {
         const id = new LearningObjectIdentifier('id03', Language.English, 1);
         const class_ = await classRepository.findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        const assignment = await assignmentRepository.findByClassAndId(class_!, 1);
-        const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 1);
+        const assignment = await assignmentRepository.findByClassAndId(class_!, 21000);
+        const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 21001);
         const submission = await submissionRepository.findMostRecentSubmissionForGroup(id, group!);
 
         expect(submission).toBeTruthy();
@@ -67,7 +67,7 @@ describe('SubmissionRepository', () => {
     let loId: LearningObjectIdentifier;
     it('should find all submissions for a certain learning object and assignment', async () => {
         clazz = await classRepository.findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        assignment = await assignmentRepository.findByClassAndId(clazz!, 1);
+        assignment = await assignmentRepository.findByClassAndId(clazz!, 21000);
         loId = {
             hruid: 'id02',
             language: Language.English,
@@ -91,9 +91,9 @@ describe('SubmissionRepository', () => {
         expect(result[2].submissionNumber).toBe(3);
     });
 
-    it("should find only the submissions for a certain learning object and assignment made for the user's group", async () => {
-        const result = await submissionRepository.findAllSubmissionsForLearningObjectAndAssignment(loId, assignment!, 'Tool');
-        // (student Tool is in group #2)
+    it('should find only the submissions for a certain learning object and assignment made for the given group', async () => {
+        const group = await groupRepository.findByAssignmentAndGroupNumber(assignment!, 21002);
+        const result = await submissionRepository.findAllSubmissionsForLearningObjectAndGroup(loId, group!);
 
         expect(result).toHaveLength(1);
 

backend/tests/data/content/attachment-repository.test.ts

@@ -2,66 +2,57 @@ import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests.js';
 import { getAttachmentRepository, getLearningObjectRepository } from '../../../src/data/repositories.js';
 import { AttachmentRepository } from '../../../src/data/content/attachment-repository.js';
-import { LearningObjectRepository } from '../../../src/data/content/learning-object-repository.js';
-import example from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example.js';
 import { LearningObject } from '../../../src/entities/content/learning-object.entity.js';
 import { Attachment } from '../../../src/entities/content/attachment.entity.js';
 import { LearningObjectIdentifier } from '../../../src/entities/content/learning-object-identifier.js';
-
-const NEWER_TEST_SUFFIX = 'nEweR';
-
-async function createTestLearningObjects(learningObjectRepo: LearningObjectRepository): Promise<{
-    older: LearningObject;
-    newer: LearningObject;
-}> {
-    const olderExample = example.createLearningObject();
-    await learningObjectRepo.save(olderExample);
-
-    const newerExample = example.createLearningObject();
-    newerExample.title = 'Newer example';
-    newerExample.version = 100;
-
-    return {
-        older: olderExample,
-        newer: newerExample,
-    };
-}
+import { testLearningObjectPnNotebooks } from '../../test_assets/content/learning-objects.testdata';
+import { v4 as uuidV4 } from 'uuid';
 
 describe('AttachmentRepository', () => {
     let attachmentRepo: AttachmentRepository;
-    let exampleLearningObjects: { older: LearningObject; newer: LearningObject };
+    let newLearningObject: LearningObject;
     let attachmentsOlderLearningObject: Attachment[];
 
     beforeAll(async () => {
         await setupTestApp();
+
+        attachmentsOlderLearningObject = testLearningObjectPnNotebooks.attachments as Attachment[];
+
         attachmentRepo = getAttachmentRepository();
-        exampleLearningObjects = await createTestLearningObjects(getLearningObjectRepository());
-    });
+        const learningObjectRepo = getLearningObjectRepository();
 
-    it('can add attachments to learning objects without throwing an error', async () => {
-        attachmentsOlderLearningObject = Object.values(example.createAttachment).map((fn) => fn(exampleLearningObjects.older));
+        const newLearningObjectData = structuredClone(testLearningObjectPnNotebooks);
+        newLearningObjectData.title = 'Newer example';
+        newLearningObjectData.version = 101;
+        newLearningObjectData.attachments = [];
+        newLearningObjectData.uuid = uuidV4();
+        newLearningObjectData.content = Buffer.from('Content of the newer example');
 
-        await Promise.all(attachmentsOlderLearningObject.map(async (attachment) => attachmentRepo.save(attachment)));
+        newLearningObject = learningObjectRepo.create(newLearningObjectData);
+        await learningObjectRepo.save(newLearningObject);
     });
 
     let attachmentOnlyNewer: Attachment;
     it('allows us to add attachments with the same name to a different learning object without throwing an error', async () => {
-        attachmentOnlyNewer = Object.values(example.createAttachment)[0](exampleLearningObjects.newer);
-        attachmentOnlyNewer.content.write(NEWER_TEST_SUFFIX);
+        attachmentOnlyNewer = structuredClone(attachmentsOlderLearningObject[0]);
+        attachmentOnlyNewer.learningObject = newLearningObject;
+        attachmentOnlyNewer.content = Buffer.from('New attachment content');
 
-        await attachmentRepo.save(attachmentOnlyNewer);
+        await attachmentRepo.save(attachmentRepo.create(attachmentOnlyNewer));
     });
 
     let olderLearningObjectId: LearningObjectIdentifier;
     it('returns the correct attachment when queried by learningObjectId and attachment name', async () => {
         olderLearningObjectId = {
-            hruid: exampleLearningObjects.older.hruid,
-            language: exampleLearningObjects.older.language,
-            version: exampleLearningObjects.older.version,
+            hruid: testLearningObjectPnNotebooks.hruid,
+            language: testLearningObjectPnNotebooks.language,
+            version: testLearningObjectPnNotebooks.version,
         };
 
         const result = await attachmentRepo.findByLearningObjectIdAndName(olderLearningObjectId, attachmentsOlderLearningObject[0].name);
-        expect(result).toBe(attachmentsOlderLearningObject[0]);
+        expect(result).not.toBeNull();
+        expect(result!.name).toEqual(attachmentsOlderLearningObject[0].name);
+        expect(result!.content).toEqual(attachmentsOlderLearningObject[0].content);
     });
 
     it('returns null when queried by learningObjectId and non-existing attachment name', async () => {
@@ -71,10 +62,12 @@ describe('AttachmentRepository', () => {
 
     it('returns the newer version of the attachment when only queried by hruid, language and attachment name (but not version)', async () => {
         const result = await attachmentRepo.findByMostRecentVersionOfLearningObjectAndName(
-            exampleLearningObjects.older.hruid,
-            exampleLearningObjects.older.language,
+            testLearningObjectPnNotebooks.hruid,
+            testLearningObjectPnNotebooks.language,
             attachmentOnlyNewer.name
         );
-        expect(result).toBe(attachmentOnlyNewer);
+        expect(result).not.toBeNull();
+        expect(result!.name).toEqual(attachmentOnlyNewer.name);
+        expect(result!.content).toEqual(attachmentOnlyNewer.content);
     });
 });

backend/tests/data/content/attachments.test.ts

@@ -1,28 +1,21 @@
 import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests.js';
-import { getAttachmentRepository, getLearningObjectRepository } from '../../../src/data/repositories.js';
+import { getAttachmentRepository } from '../../../src/data/repositories.js';
 import { AttachmentRepository } from '../../../src/data/content/attachment-repository.js';
-import { LearningObjectRepository } from '../../../src/data/content/learning-object-repository.js';
-import { LearningObjectIdentifier } from '../../../src/entities/content/learning-object-identifier.js';
-import { Language } from '@dwengo-1/common/util/language';
+import { testLearningObject02 } from '../../test_assets/content/learning-objects.testdata';
 
 describe('AttachmentRepository', () => {
     let attachmentRepository: AttachmentRepository;
-    let learningObjectRepository: LearningObjectRepository;
 
     beforeAll(async () => {
         await setupTestApp();
         attachmentRepository = getAttachmentRepository();
-        learningObjectRepository = getLearningObjectRepository();
     });
 
     it('should return the requested attachment', async () => {
-        const id = new LearningObjectIdentifier('id02', Language.English, 1);
-        const learningObject = await learningObjectRepository.findByIdentifier(id);
-
         const attachment = await attachmentRepository.findByMostRecentVersionOfLearningObjectAndName(
-            learningObject!.hruid,
-            Language.English,
+            testLearningObject02.hruid,
+            testLearningObject02.language,
             'attachment01'
         );
 

backend/tests/data/content/learning-object-repository.test.ts

@@ -2,48 +2,33 @@ import { beforeAll, describe, it, expect } from 'vitest';
 import { LearningObjectRepository } from '../../../src/data/content/learning-object-repository.js';
 import { setupTestApp } from '../../setup-tests.js';
 import { getLearningObjectRepository } from '../../../src/data/repositories.js';
-import example from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example.js';
 import { LearningObject } from '../../../src/entities/content/learning-object.entity.js';
 import { expectToBeCorrectEntity } from '../../test-utils/expectations.js';
+import { testLearningObject01, testLearningObject02, testLearningObject03 } from '../../test_assets/content/learning-objects.testdata';
+import { v4 } from 'uuid';
 
 describe('LearningObjectRepository', () => {
     let learningObjectRepository: LearningObjectRepository;
 
-    let exampleLearningObject: LearningObject;
-
     beforeAll(async () => {
         await setupTestApp();
         learningObjectRepository = getLearningObjectRepository();
     });
 
-    it('should be able to add a learning object to it without an error', async () => {
-        exampleLearningObject = example.createLearningObject();
-        await learningObjectRepository.insert(exampleLearningObject);
-    });
-
-    it('should return the learning object when queried by id', async () => {
+    it('should return a learning object when queried by id', async () => {
         const result = await learningObjectRepository.findByIdentifier({
-            hruid: exampleLearningObject.hruid,
-            language: exampleLearningObject.language,
-            version: exampleLearningObject.version,
+            hruid: testLearningObject01.hruid,
+            language: testLearningObject02.language,
+            version: testLearningObject03.version,
         });
         expect(result).toBeInstanceOf(LearningObject);
-        expectToBeCorrectEntity(
-            {
-                name: 'actual',
-                entity: result!,
-            },
-            {
-                name: 'expected',
-                entity: exampleLearningObject,
-            }
-        );
+        expectToBeCorrectEntity(result!, testLearningObject01);
     });
 
     it('should return null when non-existing version is queried', async () => {
         const result = await learningObjectRepository.findByIdentifier({
-            hruid: exampleLearningObject.hruid,
-            language: exampleLearningObject.language,
+            hruid: testLearningObject01.hruid,
+            language: testLearningObject01.language,
             version: 100,
         });
         expect(result).toBe(null);
@@ -52,9 +37,12 @@ describe('LearningObjectRepository', () => {
     let newerExample: LearningObject;
 
     it('should allow a learning object with the same id except a different version to be added', async () => {
-        newerExample = example.createLearningObject();
-        newerExample.version = 10;
-        newerExample.title += ' (nieuw)';
+        const testLearningObject01Newer = structuredClone(testLearningObject01);
+        testLearningObject01Newer.version = 10;
+        testLearningObject01Newer.title += ' (nieuw)';
+        testLearningObject01Newer.uuid = v4();
+        testLearningObject01Newer.content = Buffer.from('This is the new content.');
+        newerExample = learningObjectRepository.create(testLearningObject01Newer);
         await learningObjectRepository.save(newerExample);
     });
 
@@ -66,7 +54,7 @@ describe('LearningObjectRepository', () => {
     });
 
     it('should return null when queried by non-existing hruid or language', async () => {
-        const result = await learningObjectRepository.findLatestByHruidAndLanguage('something_that_does_not_exist', exampleLearningObject.language);
+        const result = await learningObjectRepository.findLatestByHruidAndLanguage('something_that_does_not_exist', testLearningObject01.language);
         expect(result).toBe(null);
     });
 });

backend/tests/data/content/learning-objects.test.ts

@@ -4,6 +4,7 @@ import { getLearningObjectRepository } from '../../../src/data/repositories';
 import { setupTestApp } from '../../setup-tests';
 import { LearningObjectIdentifier } from '../../../src/entities/content/learning-object-identifier';
 import { Language } from '@dwengo-1/common/util/language';
+import { testLearningObject01 } from '../../test_assets/content/learning-objects.testdata';
 
 describe('LearningObjectRepository', () => {
     let learningObjectRepository: LearningObjectRepository;
@@ -13,8 +14,8 @@ describe('LearningObjectRepository', () => {
         learningObjectRepository = getLearningObjectRepository();
     });
 
-    const id01 = new LearningObjectIdentifier('id01', Language.English, 1);
-    const id02 = new LearningObjectIdentifier('test_id', Language.English, 1);
+    const id01 = new LearningObjectIdentifier(testLearningObject01.hruid, testLearningObject01.language, testLearningObject01.version);
+    const id02 = new LearningObjectIdentifier('non_existing_id', Language.English, 1);
 
     it('should return the learning object that matches identifier 1', async () => {
         const learningObject = await learningObjectRepository.findByIdentifier(id01);

backend/tests/data/content/learning-path-repository.test.ts

@@ -2,41 +2,27 @@ import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests.js';
 import { getLearningPathRepository } from '../../../src/data/repositories.js';
 import { LearningPathRepository } from '../../../src/data/content/learning-path-repository.js';
-import example from '../../test-assets/learning-paths/pn-werking-example.js';
 import { LearningPath } from '../../../src/entities/content/learning-path.entity.js';
-import { expectToBeCorrectEntity } from '../../test-utils/expectations.js';
+import { expectToBeCorrectEntity, expectToHaveFoundNothing, expectToHaveFoundPrecisely } from '../../test-utils/expectations.js';
 import { Language } from '@dwengo-1/common/util/language';
-
-function expectToHaveFoundPrecisely(expected: LearningPath, result: LearningPath[]): void {
-    expect(result).toHaveProperty('length');
-    expect(result.length).toBe(1);
-    expectToBeCorrectEntity({ entity: result[0] }, { entity: expected });
-}
-
-function expectToHaveFoundNothing(result: LearningPath[]): void {
-    expect(result).toHaveProperty('length');
-    expect(result.length).toBe(0);
-}
+import { testLearningPath01 } from '../../test_assets/content/learning-paths.testdata';
+import { mapToLearningPath } from '../../../src/services/learning-paths/learning-path-service';
 
 describe('LearningPathRepository', () => {
     let learningPathRepo: LearningPathRepository;
+    let examplePath: LearningPath;
 
     beforeAll(async () => {
         await setupTestApp();
         learningPathRepo = getLearningPathRepository();
+
+        examplePath = mapToLearningPath(testLearningPath01, []);
     });
 
-    let examplePath: LearningPath;
-
-    it('should be able to add a learning path without throwing an error', async () => {
-        examplePath = example.createLearningPath();
-        await learningPathRepo.insert(examplePath);
-    });
-
-    it('should return the added path when it is queried by hruid and language', async () => {
-        const result = await learningPathRepo.findByHruidAndLanguage(examplePath.hruid, examplePath.language);
+    it('should return a learning path when it is queried by hruid and language', async () => {
+        const result = await learningPathRepo.findByHruidAndLanguage(testLearningPath01.hruid, testLearningPath01.language as Language);
         expect(result).toBeInstanceOf(LearningPath);
-        expectToBeCorrectEntity({ entity: result! }, { entity: examplePath });
+        expectToBeCorrectEntity(result!, examplePath);
     });
 
     it('should return null to a query on a non-existing hruid or language', async () => {
@@ -45,7 +31,7 @@ describe('LearningPathRepository', () => {
     });
 
     it('should return the learning path when we search for a search term occurring in its title', async () => {
-        const result = await learningPathRepo.findByQueryStringAndLanguage(examplePath.title.slice(4, 9), examplePath.language);
+        const result = await learningPathRepo.findByQueryStringAndLanguage(examplePath.title.slice(9, 13), examplePath.language);
         expectToHaveFoundPrecisely(examplePath, result);
     });
 

backend/tests/data/content/learning-paths.test.ts

@@ -3,6 +3,7 @@ import { getLearningPathRepository } from '../../../src/data/repositories';
 import { LearningPathRepository } from '../../../src/data/content/learning-path-repository';
 import { setupTestApp } from '../../setup-tests';
 import { Language } from '@dwengo-1/common/util/language';
+import { testLearningPath01 } from '../../test_assets/content/learning-paths.testdata';
 
 describe('LearningPathRepository', () => {
     let learningPathRepository: LearningPathRepository;
@@ -19,10 +20,10 @@ describe('LearningPathRepository', () => {
     });
 
     it('should return requested learning path', async () => {
-        const learningPath = await learningPathRepository.findByHruidAndLanguage('id01', Language.English);
+        const learningPath = await learningPathRepository.findByHruidAndLanguage(testLearningPath01.hruid, testLearningPath01.language as Language);
 
         expect(learningPath).toBeTruthy();
-        expect(learningPath?.title).toBe('repertoire Tool');
-        expect(learningPath?.description).toBe('all about Tool');
+        expect(learningPath?.title).toBe(testLearningPath01.title);
+        expect(learningPath?.description).toBe(testLearningPath01.description);
     });
 });

backend/tests/data/questions/questions.test.ts

@@ -38,8 +38,8 @@ describe('QuestionRepository', () => {
         const student = await studentRepository.findByUsername('Noordkaap');
 
         const clazz = await getClassRepository().findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        const assignment = await getAssignmentRepository().findByClassAndId(clazz!, 1);
-        const group = await getGroupRepository().findByAssignmentAndGroupNumber(assignment!, 1);
+        const assignment = await getAssignmentRepository().findByClassAndId(clazz!, 21000);
+        const group = await getGroupRepository().findByAssignmentAndGroupNumber(assignment!, 21001);
         await questionRepository.createQuestion({
             loId: id,
             inGroup: group!,
@@ -57,7 +57,7 @@ describe('QuestionRepository', () => {
     let loId: LearningObjectIdentifier;
     it('should find all questions for a certain learning object and assignment', async () => {
         clazz = await getClassRepository().findById('8764b861-90a6-42e5-9732-c0d9eb2f55f9');
-        assignment = await getAssignmentRepository().findByClassAndId(clazz!, 1);
+        assignment = await getAssignmentRepository().findByClassAndId(clazz!, 21000);
         loId = {
             hruid: 'id05',
             language: Language.English,

backend/tests/services/learning-objects/database-learning-object-provider.test.ts

@@ -1,37 +1,32 @@
 import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests';
-import { getLearningObjectRepository, getLearningPathRepository } from '../../../src/data/repositories';
-import example from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example';
 import { LearningObject } from '../../../src/entities/content/learning-object.entity';
 import databaseLearningObjectProvider from '../../../src/services/learning-objects/database-learning-object-provider';
 import { expectToBeCorrectFilteredLearningObject } from '../../test-utils/expectations';
 import { Language } from '@dwengo-1/common/util/language';
-import learningObjectExample from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example';
-import learningPathExample from '../../test-assets/learning-paths/pn-werking-example';
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-import { FilteredLearningObject } from '@dwengo-1/common/interfaces/learning-content';
-
-async function initExampleData(): Promise<{ learningObject: LearningObject; learningPath: LearningPath }> {
-    const learningObjectRepo = getLearningObjectRepository();
-    const learningPathRepo = getLearningPathRepository();
-    const learningObject = learningObjectExample.createLearningObject();
-    const learningPath = learningPathExample.createLearningPath();
-    await learningObjectRepo.save(learningObject);
-    await learningPathRepo.save(learningPath);
-    return { learningObject, learningPath };
-}
+import { FilteredLearningObject, LearningObjectNode, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
+import { testPartiallyDatabaseAndPartiallyDwengoApiLearningPath } from '../../test_assets/content/learning-paths.testdata';
+import { testLearningObjectPnNotebooks } from '../../test_assets/content/learning-objects.testdata';
+import { LearningPath } from '@dwengo-1/common/dist/interfaces/learning-content';
+import { RequiredEntityData } from '@mikro-orm/core';
+import { getHtmlRenderingForTestLearningObject } from '../../test-utils/get-html-rendering';
 
 const EXPECTED_TITLE_FROM_DWENGO_LEARNING_OBJECT = 'Notebook opslaan';
 
 describe('DatabaseLearningObjectProvider', () => {
-    let exampleLearningObject: LearningObject;
+    let exampleLearningObject: RequiredEntityData<LearningObject>;
     let exampleLearningPath: LearningPath;
+    let exampleLearningPathId: LearningPathIdentifier;
 
     beforeAll(async () => {
         await setupTestApp();
-        const exampleData = await initExampleData();
-        exampleLearningObject = exampleData.learningObject;
-        exampleLearningPath = exampleData.learningPath;
+        exampleLearningObject = testLearningObjectPnNotebooks;
+        exampleLearningPath = testPartiallyDatabaseAndPartiallyDwengoApiLearningPath;
+
+        exampleLearningPathId = {
+            hruid: exampleLearningPath.hruid,
+            language: exampleLearningPath.language as Language,
+        };
     });
     describe('getLearningObjectById', () => {
         it('should return the learning object when it is queried by its id', async () => {
@@ -61,7 +56,7 @@ describe('DatabaseLearningObjectProvider', () => {
         it('should return the correct rendering of the learning object', async () => {
             const result = await databaseLearningObjectProvider.getLearningObjectHTML(exampleLearningObject);
             // Set newlines so your tests are platform-independent.
-            expect(result).toEqual(example.getHTMLRendering().replace(/\r\n/g, '\n'));
+            expect(result).toEqual(getHtmlRenderingForTestLearningObject(exampleLearningObject).replace(/\r\n/g, '\n'));
         });
         it('should return null for a non-existing learning object', async () => {
             const result = await databaseLearningObjectProvider.getLearningObjectHTML({
@@ -73,8 +68,8 @@ describe('DatabaseLearningObjectProvider', () => {
     });
     describe('getLearningObjectIdsFromPath', () => {
         it('should return all learning object IDs from a path', async () => {
-            const result = await databaseLearningObjectProvider.getLearningObjectIdsFromPath(exampleLearningPath);
-            expect(new Set(result)).toEqual(new Set(exampleLearningPath.nodes.map((it) => it.learningObjectHruid)));
+            const result = await databaseLearningObjectProvider.getLearningObjectIdsFromPath(exampleLearningPathId);
+            expect(new Set(result)).toEqual(new Set(exampleLearningPath.nodes.map((it: LearningObjectNode) => it.learningobject_hruid)));
         });
         it('should throw an error if queried with a path identifier for which there is no learning path', async () => {
             await expect(
@@ -89,9 +84,11 @@ describe('DatabaseLearningObjectProvider', () => {
     });
     describe('getLearningObjectsFromPath', () => {
         it('should correctly return all learning objects which are on the path, even those who are not in the database', async () => {
-            const result = await databaseLearningObjectProvider.getLearningObjectsFromPath(exampleLearningPath);
+            const result = await databaseLearningObjectProvider.getLearningObjectsFromPath(exampleLearningPathId);
             expect(result.length).toBe(exampleLearningPath.nodes.length);
-            expect(new Set(result.map((it) => it.key))).toEqual(new Set(exampleLearningPath.nodes.map((it) => it.learningObjectHruid)));
+            expect(new Set(result.map((it) => it.key))).toEqual(
+                new Set(exampleLearningPath.nodes.map((it: LearningObjectNode) => it.learningobject_hruid))
+            );
 
             expect(result.map((it) => it.title)).toContainEqual(EXPECTED_TITLE_FROM_DWENGO_LEARNING_OBJECT);
         });

backend/tests/services/learning-objects/learning-object-service.test.ts

@@ -1,14 +1,14 @@
 import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests';
 import { LearningObject } from '../../../src/entities/content/learning-object.entity';
-import { getLearningObjectRepository, getLearningPathRepository } from '../../../src/data/repositories';
-import learningObjectExample from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example';
 import learningObjectService from '../../../src/services/learning-objects/learning-object-service';
 import { envVars, getEnvVar } from '../../../src/util/envVars';
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-import learningPathExample from '../../test-assets/learning-paths/pn-werking-example';
-import { LearningObjectIdentifierDTO, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
+import { LearningObjectIdentifierDTO, LearningPath as LearningPathDTO, LearningPathIdentifier } from '@dwengo-1/common/interfaces/learning-content';
 import { Language } from '@dwengo-1/common/util/language';
+import { testLearningObjectPnNotebooks } from '../../test_assets/content/learning-objects.testdata';
+import { testPartiallyDatabaseAndPartiallyDwengoApiLearningPath } from '../../test_assets/content/learning-paths.testdata';
+import { RequiredEntityData } from '@mikro-orm/core';
+import { getHtmlRenderingForTestLearningObject } from '../../test-utils/get-html-rendering';
 
 const EXPECTED_DWENGO_LEARNING_OBJECT_TITLE = 'Werken met notebooks';
 const DWENGO_TEST_LEARNING_OBJECT_ID: LearningObjectIdentifierDTO = {
@@ -23,25 +23,20 @@ const DWENGO_TEST_LEARNING_PATH_ID: LearningPathIdentifier = {
 };
 const DWENGO_TEST_LEARNING_PATH_HRUIDS = new Set(['pn_werkingnotebooks', 'pn_werkingnotebooks2', 'pn_werkingnotebooks3']);
 
-async function initExampleData(): Promise<{ learningObject: LearningObject; learningPath: LearningPath }> {
-    const learningObjectRepo = getLearningObjectRepository();
-    const learningPathRepo = getLearningPathRepository();
-    const learningObject = learningObjectExample.createLearningObject();
-    const learningPath = learningPathExample.createLearningPath();
-    await learningObjectRepo.save(learningObject);
-    await learningPathRepo.save(learningPath);
-    return { learningObject, learningPath };
-}
-
 describe('LearningObjectService', () => {
-    let exampleLearningObject: LearningObject;
-    let exampleLearningPath: LearningPath;
+    let exampleLearningObject: RequiredEntityData<LearningObject>;
+    let exampleLearningPath: LearningPathDTO;
+    let exampleLearningPathId: LearningPathIdentifier;
 
     beforeAll(async () => {
         await setupTestApp();
-        const exampleData = await initExampleData();
-        exampleLearningObject = exampleData.learningObject;
-        exampleLearningPath = exampleData.learningPath;
+        exampleLearningObject = testLearningObjectPnNotebooks;
+        exampleLearningPath = testPartiallyDatabaseAndPartiallyDwengoApiLearningPath;
+
+        exampleLearningPathId = {
+            hruid: exampleLearningPath.hruid,
+            language: exampleLearningPath.language as Language,
+        };
     });
 
     describe('getLearningObjectById', () => {
@@ -69,7 +64,7 @@ describe('LearningObjectService', () => {
             const result = await learningObjectService.getLearningObjectHTML(exampleLearningObject);
             expect(result).not.toBeNull();
             // Set newlines so your tests are platform-independent.
-            expect(result).toEqual(learningObjectExample.getHTMLRendering().replace(/\r\n/g, '\n'));
+            expect(result).toEqual(getHtmlRenderingForTestLearningObject(exampleLearningObject).replace(/\r\n/g, '\n'));
         });
         it(
             'returns the same HTML as the Dwengo API when queried with the identifier of a learning object that does ' +
@@ -97,8 +92,8 @@ describe('LearningObjectService', () => {
 
     describe('getLearningObjectsFromPath', () => {
         it('returns all learning objects when a learning path in the database is queried', async () => {
-            const result = await learningObjectService.getLearningObjectsFromPath(exampleLearningPath);
-            expect(result.map((it) => it.key)).toEqual(exampleLearningPath.nodes.map((it) => it.learningObjectHruid));
+            const result = await learningObjectService.getLearningObjectsFromPath(exampleLearningPathId);
+            expect(result.map((it) => it.key)).toEqual(exampleLearningPath.nodes.map((it) => it.learningobject_hruid));
         });
         it('also returns all learning objects when a learning path from the Dwengo API is queried', async () => {
             const result = await learningObjectService.getLearningObjectsFromPath(DWENGO_TEST_LEARNING_PATH_ID);
@@ -115,8 +110,8 @@ describe('LearningObjectService', () => {
 
     describe('getLearningObjectIdsFromPath', () => {
         it('returns all learning objects when a learning path in the database is queried', async () => {
-            const result = await learningObjectService.getLearningObjectIdsFromPath(exampleLearningPath);
-            expect(result).toEqual(exampleLearningPath.nodes.map((it) => it.learningObjectHruid));
+            const result = await learningObjectService.getLearningObjectIdsFromPath(exampleLearningPathId);
+            expect(result).toEqual(exampleLearningPath.nodes.map((it) => it.learningobject_hruid));
         });
         it('also returns all learning object hruids when a learning path from the Dwengo API is queried', async () => {
             const result = await learningObjectService.getLearningObjectIdsFromPath(DWENGO_TEST_LEARNING_PATH_ID);

backend/tests/services/learning-objects/processing/processing-service.test.ts

@@ -1,26 +1,35 @@
-import { describe, expect, it } from 'vitest';
-import mdExample from '../../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example';
-import multipleChoiceExample from '../../../test-assets/learning-objects/test-multiple-choice/test-multiple-choice-example';
-import essayExample from '../../../test-assets/learning-objects/test-essay/test-essay-example';
+import { beforeAll, describe, expect, it } from 'vitest';
 import processingService from '../../../../src/services/learning-objects/processing/processing-service';
+import {
+    testLearningObjectEssayQuestion,
+    testLearningObjectMultipleChoice,
+    testLearningObjectPnNotebooks,
+} from '../../../test_assets/content/learning-objects.testdata';
+import { getHtmlRenderingForTestLearningObject } from '../../../test-utils/get-html-rendering';
+import { getLearningObjectRepository } from '../../../../src/data/repositories';
+import { setupTestApp } from '../../../setup-tests';
 
 describe('ProcessingService', () => {
+    beforeAll(async () => {
+        await setupTestApp();
+    });
+
     it('renders a markdown learning object correctly', async () => {
-        const markdownLearningObject = mdExample.createLearningObject();
+        const markdownLearningObject = getLearningObjectRepository().create(testLearningObjectPnNotebooks);
         const result = await processingService.render(markdownLearningObject);
         // Set newlines so your tests are platform-independent.
-        expect(result).toEqual(mdExample.getHTMLRendering().replace(/\r\n/g, '\n'));
+        expect(result).toEqual(getHtmlRenderingForTestLearningObject(markdownLearningObject).replace(/\r\n/g, '\n'));
     });
 
     it('renders a multiple choice question correctly', async () => {
-        const multipleChoiceLearningObject = multipleChoiceExample.createLearningObject();
-        const result = await processingService.render(multipleChoiceLearningObject);
-        expect(result).toEqual(multipleChoiceExample.getHTMLRendering().replace(/\r\n/g, '\n'));
+        const testLearningObject = getLearningObjectRepository().create(testLearningObjectMultipleChoice);
+        const result = await processingService.render(testLearningObject);
+        expect(result).toEqual(getHtmlRenderingForTestLearningObject(testLearningObjectMultipleChoice).replace(/\r\n/g, '\n'));
     });
 
     it('renders an essay question correctly', async () => {
-        const essayLearningObject = essayExample.createLearningObject();
+        const essayLearningObject = getLearningObjectRepository().create(testLearningObjectEssayQuestion);
         const result = await processingService.render(essayLearningObject);
-        expect(result).toEqual(essayExample.getHTMLRendering().replace(/\r\n/g, '\n'));
+        expect(result).toEqual(getHtmlRenderingForTestLearningObject(essayLearningObject).replace(/\r\n/g, '\n'));
     });
 });

backend/tests/services/learning-path/database-learning-path-provider.test.ts

@@ -2,227 +2,112 @@ import { beforeAll, describe, expect, it } from 'vitest';
 import { LearningObject } from '../../../src/entities/content/learning-object.entity.js';
 import { setupTestApp } from '../../setup-tests.js';
 import { LearningPath } from '../../../src/entities/content/learning-path.entity.js';
-import {
-    getAssignmentRepository,
-    getClassRepository,
-    getGroupRepository,
-    getLearningObjectRepository,
-    getLearningPathRepository,
-    getStudentRepository,
-    getSubmissionRepository,
-} from '../../../src/data/repositories.js';
-import learningObjectExample from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example.js';
-import learningPathExample from '../../test-assets/learning-paths/pn-werking-example.js';
+import { getSubmissionRepository } from '../../../src/data/repositories.js';
+
 import databaseLearningPathProvider from '../../../src/services/learning-paths/database-learning-path-provider.js';
 import { expectToBeCorrectLearningPath } from '../../test-utils/expectations.js';
-import learningObjectService from '../../../src/services/learning-objects/learning-object-service.js';
 import { Language } from '@dwengo-1/common/util/language';
-import {
-    ConditionTestLearningPathAndLearningObjects,
-    createConditionTestLearningPathAndLearningObjects,
-} from '../../test-assets/learning-paths/test-conditions-example.js';
-import { Student } from '../../../src/entities/users/student.entity.js';
 
 import { LearningObjectNode, LearningPathResponse } from '@dwengo-1/common/interfaces/learning-content';
+import {
+    testLearningObject01,
+    testLearningObjectEssayQuestion,
+    testLearningObjectMultipleChoice,
+} from '../../test_assets/content/learning-objects.testdata';
+import { testLearningPathWithConditions } from '../../test_assets/content/learning-paths.testdata';
+import { mapToLearningPath } from '../../../src/services/learning-paths/learning-path-service';
+import { getTestGroup01, getTestGroup02 } from '../../test_assets/assignments/groups.testdata';
+import { Group } from '../../../src/entities/assignments/group.entity.js';
+import { RequiredEntityData } from '@mikro-orm/core';
 
-const STUDENT_A_USERNAME = 'student_a';
-const STUDENT_B_USERNAME = 'student_b';
-const CLASS_NAME = 'test_class';
-
-async function initExampleData(): Promise<{ learningObject: LearningObject; learningPath: LearningPath }> {
-    const learningObjectRepo = getLearningObjectRepository();
-    const learningPathRepo = getLearningPathRepository();
-    const learningObject = learningObjectExample.createLearningObject();
-    const learningPath = learningPathExample.createLearningPath();
-    await learningObjectRepo.save(learningObject);
-    await learningPathRepo.save(learningPath);
-    return { learningObject, learningPath };
-}
-
-async function initPersonalizationTestData(): Promise<{
-    learningContent: ConditionTestLearningPathAndLearningObjects;
-    studentA: Student;
-    studentB: Student;
-}> {
-    const studentRepo = getStudentRepository();
-    const classRepo = getClassRepository();
-    const assignmentRepo = getAssignmentRepository();
-    const groupRepo = getGroupRepository();
-    const submissionRepo = getSubmissionRepository();
-    const learningPathRepo = getLearningPathRepository();
-    const learningObjectRepo = getLearningObjectRepository();
-    const learningContent = createConditionTestLearningPathAndLearningObjects();
-    await learningObjectRepo.save(learningContent.branchingObject);
-    await learningObjectRepo.save(learningContent.finalObject);
-    await learningObjectRepo.save(learningContent.extraExerciseObject);
-    await learningPathRepo.save(learningContent.learningPath);
-
-    // Create students
-    const studentA = studentRepo.create({
-        username: STUDENT_A_USERNAME,
-        firstName: 'Aron',
-        lastName: 'Student',
-    });
-    await studentRepo.save(studentA);
-
-    const studentB = studentRepo.create({
-        username: STUDENT_B_USERNAME,
-        firstName: 'Bill',
-        lastName: 'Student',
-    });
-    await studentRepo.save(studentB);
-
-    // Create class for students
-    const testClass = classRepo.create({
-        classId: CLASS_NAME,
-        displayName: 'Test class',
-    });
-    await classRepo.save(testClass);
-
-    // Create assignment for students and assign them to different groups
-    const assignment = assignmentRepo.create({
-        id: 0,
-        title: 'Test assignment',
-        description: 'Test description',
-        learningPathHruid: learningContent.learningPath.hruid,
-        learningPathLanguage: learningContent.learningPath.language,
-        within: testClass,
-    });
-
-    const groupA = groupRepo.create({
-        groupNumber: 0,
-        members: [studentA],
-        assignment,
-    });
-    await groupRepo.save(groupA);
-
-    const groupB = groupRepo.create({
-        groupNumber: 1,
-        members: [studentB],
-        assignment,
-    });
-    await groupRepo.save(groupB);
-
-    // Let each of the students make a submission in his own group.
-    const submissionA = submissionRepo.create({
-        learningObjectHruid: learningContent.branchingObject.hruid,
-        learningObjectLanguage: learningContent.branchingObject.language,
-        learningObjectVersion: learningContent.branchingObject.version,
-        onBehalfOf: groupA,
-        submitter: studentA,
-        submissionTime: new Date(),
-        content: '[0]',
-    });
-    await submissionRepo.save(submissionA);
-
-    const submissionB = submissionRepo.create({
-        learningObjectHruid: learningContent.branchingObject.hruid,
-        learningObjectLanguage: learningContent.branchingObject.language,
-        learningObjectVersion: learningContent.branchingObject.version,
-        onBehalfOf: groupA,
-        submitter: studentB,
-        submissionTime: new Date(),
-        content: '[1]',
-    });
-    await submissionRepo.save(submissionB);
-
-    return {
-        learningContent: learningContent,
-        studentA: studentA,
-        studentB: studentB,
-    };
-}
-
-function expectBranchingObjectNode(
-    result: LearningPathResponse,
-    persTestData: {
-        learningContent: ConditionTestLearningPathAndLearningObjects;
-        studentA: Student;
-        studentB: Student;
-    }
-): LearningObjectNode {
-    const branchingObjectMatches = result.data![0].nodes.filter(
-        (it) => it.learningobject_hruid === persTestData.learningContent.branchingObject.hruid
-    );
+function expectBranchingObjectNode(result: LearningPathResponse): LearningObjectNode {
+    const branchingObjectMatches = result.data![0].nodes.filter((it) => it.learningobject_hruid === testLearningObjectMultipleChoice.hruid);
     expect(branchingObjectMatches.length).toBe(1);
     return branchingObjectMatches[0];
 }
 
 describe('DatabaseLearningPathProvider', () => {
-    let example: { learningObject: LearningObject; learningPath: LearningPath };
-    let persTestData: { learningContent: ConditionTestLearningPathAndLearningObjects; studentA: Student; studentB: Student };
+    let testLearningPath: LearningPath;
+    let branchingLearningObject: RequiredEntityData<LearningObject>;
+    let extraExerciseLearningObject: RequiredEntityData<LearningObject>;
+    let finalLearningObject: RequiredEntityData<LearningObject>;
+    let groupA: Group;
+    let groupB: Group;
 
     beforeAll(async () => {
         await setupTestApp();
-        example = await initExampleData();
-        persTestData = await initPersonalizationTestData();
+        testLearningPath = mapToLearningPath(testLearningPathWithConditions, []);
+        branchingLearningObject = testLearningObjectMultipleChoice;
+        extraExerciseLearningObject = testLearningObject01;
+        finalLearningObject = testLearningObjectEssayQuestion;
+        groupA = getTestGroup01();
+        groupB = getTestGroup02();
+
+        // Place different submissions for group A and B.
+        const submissionRepo = getSubmissionRepository();
+        const submissionA = submissionRepo.create({
+            learningObjectHruid: branchingLearningObject.hruid,
+            learningObjectLanguage: branchingLearningObject.language,
+            learningObjectVersion: branchingLearningObject.version,
+            content: '[0]',
+            onBehalfOf: groupA,
+            submissionTime: new Date(),
+            submitter: groupA.members[0],
+        });
+        await submissionRepo.save(submissionA);
+
+        const submissionB = submissionRepo.create({
+            learningObjectHruid: branchingLearningObject.hruid,
+            learningObjectLanguage: branchingLearningObject.language,
+            learningObjectVersion: branchingLearningObject.version,
+            content: '[1]',
+            onBehalfOf: groupB,
+            submissionTime: new Date(),
+            submitter: groupB.members[0],
+        });
+        await submissionRepo.save(submissionB);
     });
 
     describe('fetchLearningPaths', () => {
         it('returns the learning path correctly', async () => {
-            const result = await databaseLearningPathProvider.fetchLearningPaths(
-                [example.learningPath.hruid],
-                example.learningPath.language,
-                'the source'
-            );
+            const result = await databaseLearningPathProvider.fetchLearningPaths([testLearningPath.hruid], testLearningPath.language, 'the source');
             expect(result.success).toBe(true);
             expect(result.data?.length).toBe(1);
 
-            const learningObjectsOnPath = (
-                await Promise.all(
-                    example.learningPath.nodes.map(async (node) =>
-                        learningObjectService.getLearningObjectById({
-                            hruid: node.learningObjectHruid,
-                            version: node.version,
-                            language: node.language,
-                        })
-                    )
-                )
-            ).filter((it) => it !== null);
-
-            expectToBeCorrectLearningPath(result.data![0], example.learningPath, learningObjectsOnPath);
+            expectToBeCorrectLearningPath(result.data![0], testLearningPathWithConditions);
         });
         it('returns the correct personalized learning path', async () => {
             // For student A:
             let result = await databaseLearningPathProvider.fetchLearningPaths(
-                [persTestData.learningContent.learningPath.hruid],
-                persTestData.learningContent.learningPath.language,
+                [testLearningPath.hruid],
+                testLearningPath.language,
                 'the source',
-                { type: 'student', student: persTestData.studentA }
+                groupA
             );
             expect(result.success).toBeTruthy();
             expect(result.data?.length).toBe(1);
 
             // There should be exactly one branching object
-            let branchingObject = expectBranchingObjectNode(result, persTestData);
+            let branchingObject = expectBranchingObjectNode(result);
 
-            expect(branchingObject.transitions.filter((it) => it.next.hruid === persTestData.learningContent.finalObject.hruid).length).toBe(0); // StudentA picked the first option, therefore, there should be no direct path to the final object.
-            expect(branchingObject.transitions.filter((it) => it.next.hruid === persTestData.learningContent.extraExerciseObject.hruid).length).toBe(
-                1
-            ); // There should however be a path to the extra exercise object.
+            expect(branchingObject.transitions.filter((it) => it.next.hruid === finalLearningObject.hruid).length).toBe(0); // StudentA picked the first option, therefore, there should be no direct path to the final object.
+            expect(branchingObject.transitions.filter((it) => it.next.hruid === extraExerciseLearningObject.hruid).length).toBe(1); // There should however be a path to the extra exercise object.
 
             // For student B:
-            result = await databaseLearningPathProvider.fetchLearningPaths(
-                [persTestData.learningContent.learningPath.hruid],
-                persTestData.learningContent.learningPath.language,
-                'the source',
-                { type: 'student', student: persTestData.studentB }
-            );
+            result = await databaseLearningPathProvider.fetchLearningPaths([testLearningPath.hruid], testLearningPath.language, 'the source', groupB);
             expect(result.success).toBeTruthy();
             expect(result.data?.length).toBe(1);
 
             // There should still be exactly one branching object
-            branchingObject = expectBranchingObjectNode(result, persTestData);
+            branchingObject = expectBranchingObjectNode(result);
 
             // However, now the student picks the other option.
-            expect(branchingObject.transitions.filter((it) => it.next.hruid === persTestData.learningContent.finalObject.hruid).length).toBe(1); // StudentB picked the second option, therefore, there should be a direct path to the final object.
-            expect(branchingObject.transitions.filter((it) => it.next.hruid === persTestData.learningContent.extraExerciseObject.hruid).length).toBe(
-                0
-            ); // There should not be a path anymore to the extra exercise object.
+            expect(branchingObject.transitions.filter((it) => it.next.hruid === finalLearningObject.hruid).length).toBe(1); // StudentB picked the second option, therefore, there should be a direct path to the final object.
+            expect(branchingObject.transitions.filter((it) => it.next.hruid === extraExerciseLearningObject.hruid).length).toBe(0); // There should not be a path anymore to the extra exercise object.
         });
         it('returns a non-successful response if a non-existing learning path is queried', async () => {
             const result = await databaseLearningPathProvider.fetchLearningPaths(
-                [example.learningPath.hruid],
+                [testLearningPath.hruid],
                 Language.Abkhazian, // Wrong language
                 'the source'
             );
@@ -233,27 +118,24 @@ describe('DatabaseLearningPathProvider', () => {
 
     describe('searchLearningPaths', () => {
         it('returns the correct learning path when queried with a substring of its title', async () => {
-            const result = await databaseLearningPathProvider.searchLearningPaths(
-                example.learningPath.title.substring(2, 6),
-                example.learningPath.language
-            );
+            const result = await databaseLearningPathProvider.searchLearningPaths(testLearningPath.title.substring(2, 6), testLearningPath.language);
             expect(result.length).toBe(1);
-            expect(result[0].title).toBe(example.learningPath.title);
-            expect(result[0].description).toBe(example.learningPath.description);
+            expect(result[0].title).toBe(testLearningPath.title);
+            expect(result[0].description).toBe(testLearningPath.description);
         });
         it('returns the correct learning path when queried with a substring of the description', async () => {
             const result = await databaseLearningPathProvider.searchLearningPaths(
-                example.learningPath.description.substring(5, 12),
-                example.learningPath.language
+                testLearningPath.description.substring(5, 12),
+                testLearningPath.language
             );
             expect(result.length).toBe(1);
-            expect(result[0].title).toBe(example.learningPath.title);
-            expect(result[0].description).toBe(example.learningPath.description);
+            expect(result[0].title).toBe(testLearningPath.title);
+            expect(result[0].description).toBe(testLearningPath.description);
         });
         it('returns an empty result when queried with a text which is not a substring of the title or the description of a learning path', async () => {
             const result = await databaseLearningPathProvider.searchLearningPaths(
                 'substring which does not occur in the title or the description of a learning object',
-                example.learningPath.language
+                testLearningPath.language
             );
             expect(result.length).toBe(0);
         });

backend/tests/services/learning-path/learning-path-service.test.ts

@@ -1,22 +1,9 @@
 import { beforeAll, describe, expect, it } from 'vitest';
 import { setupTestApp } from '../../setup-tests';
-import { LearningObject } from '../../../src/entities/content/learning-object.entity';
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-import { getLearningObjectRepository, getLearningPathRepository } from '../../../src/data/repositories';
-import learningObjectExample from '../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example';
-import learningPathExample from '../../test-assets/learning-paths/pn-werking-example';
 import learningPathService from '../../../src/services/learning-paths/learning-path-service';
 import { Language } from '@dwengo-1/common/util/language';
-
-async function initExampleData(): Promise<{ learningObject: LearningObject; learningPath: LearningPath }> {
-    const learningObjectRepo = getLearningObjectRepository();
-    const learningPathRepo = getLearningPathRepository();
-    const learningObject = learningObjectExample.createLearningObject();
-    const learningPath = learningPathExample.createLearningPath();
-    await learningObjectRepo.save(learningObject);
-    await learningPathRepo.save(learningPath);
-    return { learningObject, learningPath };
-}
+import { testPartiallyDatabaseAndPartiallyDwengoApiLearningPath } from '../../test_assets/content/learning-paths.testdata';
+import { LearningPath as LearningPathDTO } from '@dwengo-1/common/interfaces/learning-content';
 
 const TEST_DWENGO_LEARNING_PATH_HRUID = 'pn_werking';
 const TEST_DWENGO_LEARNING_PATH_TITLE = 'Werken met notebooks';
@@ -24,42 +11,49 @@ const TEST_DWENGO_EXCLUSIVE_LEARNING_PATH_SEARCH_QUERY = 'Microscopie';
 const TEST_SEARCH_QUERY_EXPECTING_NO_MATCHES = 'su$m8f9usf89ud<p9<U8SDP8UP9';
 
 describe('LearningPathService', () => {
-    let example: { learningObject: LearningObject; learningPath: LearningPath };
+    let testLearningPath: LearningPathDTO;
     beforeAll(async () => {
         await setupTestApp();
-        example = await initExampleData();
+        testLearningPath = testPartiallyDatabaseAndPartiallyDwengoApiLearningPath;
     });
     describe('fetchLearningPaths', () => {
         it('should return learning paths both from the database and from the Dwengo API', async () => {
             const result = await learningPathService.fetchLearningPaths(
-                [example.learningPath.hruid, TEST_DWENGO_LEARNING_PATH_HRUID],
-                example.learningPath.language,
+                [testLearningPath.hruid, TEST_DWENGO_LEARNING_PATH_HRUID],
+                testLearningPath.language as Language,
                 'the source'
             );
             expect(result.success).toBeTruthy();
             expect(result.data?.filter((it) => it.hruid === TEST_DWENGO_LEARNING_PATH_HRUID).length).not.toBe(0);
-            expect(result.data?.filter((it) => it.hruid === example.learningPath.hruid).length).not.toBe(0);
+            expect(result.data?.filter((it) => it.hruid === testLearningPath.hruid).length).not.toBe(0);
             expect(result.data?.find((it) => it.hruid === TEST_DWENGO_LEARNING_PATH_HRUID)?.title).toEqual(TEST_DWENGO_LEARNING_PATH_TITLE);
-            expect(result.data?.find((it) => it.hruid === example.learningPath.hruid)?.title).toEqual(example.learningPath.title);
+            expect(result.data?.find((it) => it.hruid === testLearningPath.hruid)?.title).toEqual(testLearningPath.title);
         });
         it('should include both the learning objects from the Dwengo API and learning objects from the database in its response', async () => {
-            const result = await learningPathService.fetchLearningPaths([example.learningPath.hruid], example.learningPath.language, 'the source');
+            const result = await learningPathService.fetchLearningPaths(
+                [testLearningPath.hruid],
+                testLearningPath.language as Language,
+                'the source'
+            );
             expect(result.success).toBeTruthy();
             expect(result.data?.length).toBe(1);
 
             // Should include all the nodes, even those pointing to foreign learning objects.
             expect([...result.data![0].nodes.map((it) => it.learningobject_hruid)].sort((a, b) => a.localeCompare(b))).toEqual(
-                example.learningPath.nodes.map((it) => it.learningObjectHruid).sort((a, b) => a.localeCompare(b))
+                testLearningPath.nodes.map((it) => it.learningobject_hruid).sort((a, b) => a.localeCompare(b))
             );
         });
     });
     describe('searchLearningPath', () => {
         it('should include both the learning paths from the Dwengo API and those from the database in its response', async () => {
             // This matches the learning object in the database, but definitely also some learning objects in the Dwengo API.
-            const result = await learningPathService.searchLearningPaths(example.learningPath.title.substring(2, 3), example.learningPath.language);
+            const result = await learningPathService.searchLearningPaths(
+                testLearningPath.title.substring(2, 3),
+                testLearningPath.language as Language
+            );
 
             // Should find the one from the database
-            expect(result.filter((it) => it.hruid === example.learningPath.hruid && it.title === example.learningPath.title).length).toBe(1);
+            expect(result.filter((it) => it.hruid === testLearningPath.hruid && it.title === testLearningPath.title).length).toBe(1);
 
             // But should not only find that one.
             expect(result.length).not.toBeLessThan(2);
@@ -71,7 +65,7 @@ describe('LearningPathService', () => {
             expect(result.length).not.toBe(0);
 
             // But not the example learning path.
-            expect(result.filter((it) => it.hruid === example.learningPath.hruid && it.title === example.learningPath.title).length).toBe(0);
+            expect(result.filter((it) => it.hruid === testLearningPath.hruid && it.title === testLearningPath.title).length).toBe(0);
         });
         it('should return an empty list if neither the Dwengo API nor the database contains matches', async () => {
             const result = await learningPathService.searchLearningPaths(TEST_SEARCH_QUERY_EXPECTING_NO_MATCHES, Language.Dutch);

backend/tests/setup-tests.ts

@@ -13,6 +13,8 @@ import { makeTestAttachments } from './test_assets/content/attachments.testdata.
 import { makeTestQuestions } from './test_assets/questions/questions.testdata.js';
 import { makeTestAnswers } from './test_assets/questions/answers.testdata.js';
 import { makeTestSubmissions } from './test_assets/assignments/submission.testdata.js';
+import { Collection } from '@mikro-orm/core';
+import { Group } from '../src/entities/assignments/group.entity';
 
 export async function setupTestApp(): Promise<void> {
     dotenv.config({ path: '.env.test' });
@@ -28,8 +30,8 @@ export async function setupTestApp(): Promise<void> {
     const assignments = makeTestAssignemnts(em, classes);
     const groups = makeTestGroups(em, students, assignments);
 
-    assignments[0].groups = groups.slice(0, 3);
-    assignments[1].groups = groups.slice(3, 4);
+    assignments[0].groups = new Collection<Group>(groups.slice(0, 3));
+    assignments[1].groups = new Collection<Group>(groups.slice(3, 4));
 
     const teacherInvitations = makeTestTeacherInvitations(em, teachers, classes);
     const classJoinRequests = makeTestClassJoinRequests(em, students, classes);

backend/tests/test-assets/learning-objects/create-example-learning-object-with-attachments.ts

@@ -1,10 +0,0 @@
-import { LearningObjectExample } from './learning-object-example';
-import { LearningObject } from '../../../src/entities/content/learning-object.entity';
-
-export function createExampleLearningObjectWithAttachments(example: LearningObjectExample): LearningObject {
-    const learningObject = example.createLearningObject();
-    for (const creationFn of Object.values(example.createAttachment)) {
-        learningObject.attachments.push(creationFn(learningObject));
-    }
-    return learningObject;
-}

backend/tests/test-assets/learning-objects/dummy/dummy-learning-object-example.ts

@@ -1,32 +0,0 @@
-import { LearningObjectExample } from '../learning-object-example';
-import { LearningObject } from '../../../../src/entities/content/learning-object.entity';
-import { Language } from '@dwengo-1/common/util/language';
-import { loadTestAsset } from '../../../test-utils/load-test-asset';
-import { DwengoContentType } from '../../../../src/services/learning-objects/processing/content-type';
-import { envVars, getEnvVar } from '../../../../src/util/envVars';
-
-/**
- * Create a dummy learning object to be used in tests where multiple learning objects are needed (for example for use
- * on a path), but where the precise contents of the learning object are not important.
- */
-export function dummyLearningObject(hruid: string, language: Language, title: string): LearningObjectExample {
-    return {
-        createLearningObject: (): LearningObject => {
-            const learningObject = new LearningObject();
-            learningObject.hruid = getEnvVar(envVars.UserContentPrefix) + hruid;
-            learningObject.language = language;
-            learningObject.version = 1;
-            learningObject.title = title;
-            learningObject.description = 'Just a dummy learning object for testing purposes';
-            learningObject.contentType = DwengoContentType.TEXT_PLAIN;
-            learningObject.content = Buffer.from('Dummy content');
-            learningObject.returnValue = {
-                callbackUrl: `/learningObject/${hruid}/submissions`,
-                callbackSchema: '[]',
-            };
-            return learningObject;
-        },
-        createAttachment: {},
-        getHTMLRendering: () => loadTestAsset('learning-objects/dummy/rendering.txt').toString(),
-    };
-}

backend/tests/test-assets/learning-objects/learning-object-example.d.ts

@@ -1,8 +0,0 @@
-import { LearningObject } from '../../../src/entities/content/learning-object.entity';
-import { Attachment } from '../../../src/entities/content/attachment.entity';
-
-interface LearningObjectExample {
-    createLearningObject: () => LearningObject;
-    createAttachment: Record<string, (owner: LearningObject) => Attachment>;
-    getHTMLRendering: () => string;
-}

backend/tests/test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example.ts

@@ -1,74 +0,0 @@
-import { LearningObjectExample } from '../learning-object-example';
-import { Language } from '@dwengo-1/common/util/language';
-import { DwengoContentType } from '../../../../src/services/learning-objects/processing/content-type';
-import { loadTestAsset } from '../../../test-utils/load-test-asset';
-import { LearningObject } from '../../../../src/entities/content/learning-object.entity';
-import { Attachment } from '../../../../src/entities/content/attachment.entity';
-import { envVars, getEnvVar } from '../../../../src/util/envVars';
-import { EducationalGoal } from '../../../../src/entities/content/educational-goal.entity';
-import { ReturnValue } from '../../../../src/entities/content/return-value.entity';
-
-const ASSETS_PREFIX = 'learning-objects/pn-werkingnotebooks/';
-
-const example: LearningObjectExample = {
-    createLearningObject: () => {
-        const learningObject = new LearningObject();
-        learningObject.hruid = `${getEnvVar(envVars.UserContentPrefix)}pn_werkingnotebooks`;
-        learningObject.version = 3;
-        learningObject.language = Language.Dutch;
-        learningObject.title = 'Werken met notebooks';
-        learningObject.description = 'Leren werken met notebooks';
-        learningObject.keywords = ['Python', 'KIKS', 'Wiskunde', 'STEM', 'AI'];
-
-        const educationalGoal1 = new EducationalGoal();
-        educationalGoal1.source = 'Source';
-        educationalGoal1.id = 'id';
-
-        const educationalGoal2 = new EducationalGoal();
-        educationalGoal2.source = 'Source2';
-        educationalGoal2.id = 'id2';
-
-        learningObject.educationalGoals = [educationalGoal1, educationalGoal2];
-        learningObject.admins = [];
-        learningObject.contentType = DwengoContentType.TEXT_MARKDOWN;
-        learningObject.teacherExclusive = false;
-        learningObject.skosConcepts = [
-            'http://ilearn.ilabt.imec.be/vocab/curr1/s-vaktaal',
-            'http://ilearn.ilabt.imec.be/vocab/curr1/s-digitale-media-en-toepassingen',
-            'http://ilearn.ilabt.imec.be/vocab/curr1/s-computers-en-systemen',
-        ];
-        learningObject.copyright = 'dwengo';
-        learningObject.license = 'dwengo';
-        learningObject.estimatedTime = 10;
-
-        const returnValue = new ReturnValue();
-        returnValue.callbackUrl = 'callback_url_example';
-        returnValue.callbackSchema = '{"att": "test", "att2": "test2"}';
-
-        learningObject.returnValue = returnValue;
-        learningObject.available = true;
-        learningObject.content = loadTestAsset(`${ASSETS_PREFIX}/content.md`);
-
-        return learningObject;
-    },
-    createAttachment: {
-        dwengoLogo: (learningObject) => {
-            const att = new Attachment();
-            att.learningObject = learningObject;
-            att.name = 'dwengo.png';
-            att.mimeType = 'image/png';
-            att.content = loadTestAsset(`${ASSETS_PREFIX}/dwengo.png`);
-            return att;
-        },
-        knop: (learningObject) => {
-            const att = new Attachment();
-            att.learningObject = learningObject;
-            att.name = 'Knop.png';
-            att.mimeType = 'image/png';
-            att.content = loadTestAsset(`${ASSETS_PREFIX}/Knop.png`);
-            return att;
-        },
-    },
-    getHTMLRendering: () => loadTestAsset(`${ASSETS_PREFIX}/rendering.txt`).toString(),
-};
-export default example;

backend/tests/test-assets/learning-objects/test-essay/content.txt

@@ -1,2 +0,0 @@
-::MC basic::
-How are you? {}

backend/tests/test-assets/learning-objects/test-essay/rendering.txt

@@ -1,7 +0,0 @@
-<div class="learning-object-gift">
-    <div id="gift-q1" class="gift-question">
-        <h2 id="gift-q1-title" class="gift-title">MC basic</h2>
-        <p id="gift-q1-stem" class="gift-stem">How are you?</p>
-        <textarea id="gift-q1-answer" class="gift-essay-answer"></textarea>
-    </div>
-</div>

backend/tests/test-assets/learning-objects/test-essay/test-essay-example.ts

@@ -1,28 +0,0 @@
-import { LearningObjectExample } from '../learning-object-example';
-import { LearningObject } from '../../../../src/entities/content/learning-object.entity';
-import { loadTestAsset } from '../../../test-utils/load-test-asset';
-import { envVars, getEnvVar } from '../../../../src/util/envVars';
-import { Language } from '@dwengo-1/common/util/language';
-import { DwengoContentType } from '../../../../src/services/learning-objects/processing/content-type';
-
-const example: LearningObjectExample = {
-    createLearningObject: () => {
-        const learningObject = new LearningObject();
-        learningObject.hruid = `${getEnvVar(envVars.UserContentPrefix)}test_essay`;
-        learningObject.language = Language.English;
-        learningObject.version = 1;
-        learningObject.title = 'Essay question for testing';
-        learningObject.description = 'This essay question was only created for testing purposes.';
-        learningObject.contentType = DwengoContentType.GIFT;
-        learningObject.returnValue = {
-            callbackUrl: `/learningObject/${learningObject.hruid}/submissions`,
-            callbackSchema: '["antwoord vraag 1"]',
-        };
-        learningObject.content = loadTestAsset('learning-objects/test-essay/content.txt');
-        return learningObject;
-    },
-    createAttachment: {},
-    getHTMLRendering: () => loadTestAsset('learning-objects/test-essay/rendering.txt').toString(),
-};
-
-export default example;

backend/tests/test-assets/learning-objects/test-multiple-choice/test-multiple-choice-example.ts

@@ -1,28 +0,0 @@
-import { LearningObjectExample } from '../learning-object-example';
-import { LearningObject } from '../../../../src/entities/content/learning-object.entity';
-import { loadTestAsset } from '../../../test-utils/load-test-asset';
-import { envVars, getEnvVar } from '../../../../src/util/envVars';
-import { DwengoContentType } from '../../../../src/services/learning-objects/processing/content-type';
-import { Language } from '@dwengo-1/common/util/language';
-
-const example: LearningObjectExample = {
-    createLearningObject: () => {
-        const learningObject = new LearningObject();
-        learningObject.hruid = `${getEnvVar(envVars.UserContentPrefix)}test_multiple_choice`;
-        learningObject.language = Language.English;
-        learningObject.version = 1;
-        learningObject.title = 'Multiple choice question for testing';
-        learningObject.description = 'This multiple choice question was only created for testing purposes.';
-        learningObject.contentType = DwengoContentType.GIFT;
-        learningObject.returnValue = {
-            callbackUrl: `/learningObject/${learningObject.hruid}/submissions`,
-            callbackSchema: '["antwoord vraag 1"]',
-        };
-        learningObject.content = loadTestAsset('learning-objects/test-multiple-choice/content.txt');
-        return learningObject;
-    },
-    createAttachment: {},
-    getHTMLRendering: () => loadTestAsset('learning-objects/test-multiple-choice/rendering.txt').toString(),
-};
-
-export default example;

backend/tests/test-assets/learning-paths/learning-path-example.d.ts

@@ -1,3 +0,0 @@
-interface LearningPathExample {
-    createLearningPath: () => LearningPath;
-}

backend/tests/test-assets/learning-paths/learning-path-utils.ts

@@ -1,36 +0,0 @@
-import { Language } from '@dwengo-1/common/util/language';
-import { LearningPathTransition } from '../../../src/entities/content/learning-path-transition.entity';
-import { LearningPathNode } from '../../../src/entities/content/learning-path-node.entity';
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-
-export function createLearningPathTransition(
-    node: LearningPathNode,
-    transitionNumber: number,
-    condition: string | null,
-    to: LearningPathNode
-): LearningPathTransition {
-    const trans = new LearningPathTransition();
-    trans.node = node;
-    trans.transitionNumber = transitionNumber;
-    trans.condition = condition || 'true';
-    trans.next = to;
-    return trans;
-}
-
-export function createLearningPathNode(
-    learningPath: LearningPath,
-    nodeNumber: number,
-    learningObjectHruid: string,
-    version: number,
-    language: Language,
-    startNode: boolean
-): LearningPathNode {
-    const node = new LearningPathNode();
-    node.learningPath = learningPath;
-    node.nodeNumber = nodeNumber;
-    node.learningObjectHruid = learningObjectHruid;
-    node.version = version;
-    node.language = language;
-    node.startNode = startNode;
-    return node;
-}

backend/tests/test-assets/learning-paths/pn-werking-example.ts

@@ -1,30 +0,0 @@
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-import { Language } from '@dwengo-1/common/util/language';
-import { envVars, getEnvVar } from '../../../src/util/envVars';
-import { createLearningPathNode, createLearningPathTransition } from './learning-path-utils';
-import { LearningPathNode } from '../../../src/entities/content/learning-path-node.entity';
-
-function createNodes(learningPath: LearningPath): LearningPathNode[] {
-    const nodes = [
-        createLearningPathNode(learningPath, 0, 'u_pn_werkingnotebooks', 3, Language.Dutch, true),
-        createLearningPathNode(learningPath, 1, 'pn_werkingnotebooks2', 3, Language.Dutch, false),
-        createLearningPathNode(learningPath, 2, 'pn_werkingnotebooks3', 3, Language.Dutch, false),
-    ];
-    nodes[0].transitions.push(createLearningPathTransition(nodes[0], 0, 'true', nodes[1]));
-    nodes[1].transitions.push(createLearningPathTransition(nodes[1], 0, 'true', nodes[2]));
-    return nodes;
-}
-
-const example: LearningPathExample = {
-    createLearningPath: () => {
-        const path = new LearningPath();
-        path.language = Language.Dutch;
-        path.hruid = `${getEnvVar(envVars.UserContentPrefix)}pn_werking`;
-        path.title = 'Werken met notebooks';
-        path.description = 'Een korte inleiding tot Python notebooks. Hoe ga je gemakkelijk en efficiënt met de notebooks aan de slag?';
-        path.nodes = createNodes(path);
-        return path;
-    },
-};
-
-export default example;

backend/tests/test-assets/learning-paths/test-conditions-example.ts

@@ -1,80 +0,0 @@
-import { LearningPath } from '../../../src/entities/content/learning-path.entity';
-import { Language } from '@dwengo-1/common/util/language';
-import testMultipleChoiceExample from '../learning-objects/test-multiple-choice/test-multiple-choice-example';
-import { dummyLearningObject } from '../learning-objects/dummy/dummy-learning-object-example';
-import { createLearningPathNode, createLearningPathTransition } from './learning-path-utils';
-import { LearningObject } from '../../../src/entities/content/learning-object.entity';
-import { envVars, getEnvVar } from '../../../src/util/envVars';
-
-export interface ConditionTestLearningPathAndLearningObjects {
-    branchingObject: LearningObject;
-    extraExerciseObject: LearningObject;
-    finalObject: LearningObject;
-    learningPath: LearningPath;
-}
-
-export function createConditionTestLearningPathAndLearningObjects(): ConditionTestLearningPathAndLearningObjects {
-    const learningPath = new LearningPath();
-    learningPath.hruid = `${getEnvVar(envVars.UserContentPrefix)}test_conditions`;
-    learningPath.language = Language.English;
-    learningPath.title = 'Example learning path with conditional transitions';
-    learningPath.description = 'This learning path was made for the purpose of testing conditional transitions';
-
-    const branchingLearningObject = testMultipleChoiceExample.createLearningObject();
-    const extraExerciseLearningObject = dummyLearningObject(
-        'test_extra_exercise',
-        Language.English,
-        'Extra exercise (for students with difficulties)'
-    ).createLearningObject();
-    const finalLearningObject = dummyLearningObject(
-        'test_final_learning_object',
-        Language.English,
-        'Final exercise (for everyone)'
-    ).createLearningObject();
-
-    const branchingNode = createLearningPathNode(
-        learningPath,
-        0,
-        branchingLearningObject.hruid,
-        branchingLearningObject.version,
-        branchingLearningObject.language,
-        true
-    );
-    const extraExerciseNode = createLearningPathNode(
-        learningPath,
-        1,
-        extraExerciseLearningObject.hruid,
-        extraExerciseLearningObject.version,
-        extraExerciseLearningObject.language,
-        false
-    );
-    const finalNode = createLearningPathNode(
-        learningPath,
-        2,
-        finalLearningObject.hruid,
-        finalLearningObject.version,
-        finalLearningObject.language,
-        false
-    );
-
-    const transitionToExtraExercise = createLearningPathTransition(
-        branchingNode,
-        0,
-        '$[?(@[0] == 0)]', // The answer to the first question was the first one, which says that it is difficult for the student to follow along.
-        extraExerciseNode
-    );
-    const directTransitionToFinal = createLearningPathTransition(branchingNode, 1, '$[?(@[0] == 1)]', finalNode);
-    const transitionExtraExerciseToFinal = createLearningPathTransition(extraExerciseNode, 0, 'true', finalNode);
-
-    branchingNode.transitions = [transitionToExtraExercise, directTransitionToFinal];
-    extraExerciseNode.transitions = [transitionExtraExerciseToFinal];
-
-    learningPath.nodes = [branchingNode, extraExerciseNode, finalNode];
-
-    return {
-        branchingObject: branchingLearningObject,
-        finalObject: finalLearningObject,
-        extraExerciseObject: extraExerciseLearningObject,
-        learningPath: learningPath,
-    };
-}

backend/tests/test-utils/expectations.ts

@@ -1,8 +1,8 @@
 import { AssertionError } from 'node:assert';
 import { LearningObject } from '../../src/entities/content/learning-object.entity';
-import { LearningPath as LearningPathEntity } from '../../src/entities/content/learning-path.entity';
 import { expect } from 'vitest';
 import { FilteredLearningObject, LearningPath } from '@dwengo-1/common/interfaces/learning-content';
+import { RequiredEntityData } from '@mikro-orm/core';
 
 // Ignored properties because they belang for example to the class, not to the entity itself.
 const IGNORE_PROPERTIES = ['parent'];
@@ -11,53 +11,44 @@ const IGNORE_PROPERTIES = ['parent'];
  * Checks if the actual entity from the database conforms to the entity that was added previously.
  * @param actual The actual entity retrieved from the database
  * @param expected The (previously added) entity we would expect to retrieve
+ * @param propertyPrefix Prefix to append to property in error messages.
  */
-export function expectToBeCorrectEntity<T extends object>(actual: { entity: T; name?: string }, expected: { entity: T; name?: string }): void {
-    if (!actual.name) {
-        actual.name = 'actual';
-    }
-    if (!expected.name) {
-        expected.name = 'expected';
-    }
-    for (const property in expected.entity) {
-        if (
-            property in IGNORE_PROPERTIES &&
-            expected.entity[property] !== undefined && // If we don't expect a certain value for a property, we assume it can be filled in by the database however it wants.
-            typeof expected.entity[property] !== 'function' // Functions obviously are not persisted via the database
-        ) {
-            if (!Object.prototype.hasOwnProperty.call(actual.entity, property)) {
-                throw new AssertionError({
-                    message: `${expected.name} has defined property ${property}, but ${actual.name} is missing it.`,
-                });
-            }
-            if (typeof expected.entity[property] === 'boolean') {
-                // Sometimes, booleans get represented by numbers 0 and 1 in the objects actual from the database.
-                if (Boolean(expected.entity[property]) !== Boolean(actual.entity[property])) {
+export function expectToBeCorrectEntity<T extends object>(actual: T, expected: T, propertyPrefix = ''): void {
+    for (const property in expected) {
+        if (Object.prototype.hasOwnProperty.call(expected, property)) {
+            const prefixedProperty = propertyPrefix + property;
+            if (
+                property in IGNORE_PROPERTIES &&
+                expected[property] !== undefined && // If we don't expect a certain value for a property, we assume it can be filled in by the database however it wants.
+                typeof expected[property] !== 'function' // Functions obviously are not persisted via the database
+            ) {
+                if (!Object.prototype.hasOwnProperty.call(actual, property)) {
                     throw new AssertionError({
-                        message: `${property} was ${expected.entity[property]} in ${expected.name},
-                        but ${actual.entity[property]} (${Boolean(expected.entity[property])}) in ${actual.name}`,
+                        message: `Expected property ${prefixedProperty}, but it is missing.`,
                     });
                 }
-            } else if (typeof expected.entity[property] !== typeof actual.entity[property]) {
-                throw new AssertionError({
-                    message: `${property} has type ${typeof expected.entity[property]} in ${expected.name}, but type ${typeof actual.entity[property]} in ${actual.name}.`,
-                });
-            } else if (typeof expected.entity[property] === 'object') {
-                expectToBeCorrectEntity(
-                    {
-                        name: actual.name + '.' + property,
-                        entity: actual.entity[property] as object,
-                    },
-                    {
-                        name: expected.name + '.' + property,
-                        entity: expected.entity[property] as object,
+                if (typeof expected[property] === 'boolean') {
+                    // Sometimes, booleans get represented by numbers 0 and 1 in the objects actual from the database.
+                    if (Boolean(expected[property]) !== Boolean(actual[property])) {
+                        throw new AssertionError({
+                            message: `Expected ${prefixedProperty} to be ${expected[property]},
+                        but was ${actual[property]} (${Boolean(expected[property])}).`,
+                        });
                     }
-                );
-            } else {
-                if (expected.entity[property] !== actual.entity[property]) {
+                } else if (typeof expected[property] !== typeof actual[property]) {
                     throw new AssertionError({
-                        message: `${property} was ${expected.entity[property]} in ${expected.name}, but ${actual.entity[property]} in ${actual.name}`,
+                        message:
+                            `${prefixedProperty} was expected to have type ${typeof expected[property]},` +
+                            `but had type ${typeof actual[property]}.`,
                     });
+                } else if (typeof expected[property] === 'object') {
+                    expectToBeCorrectEntity(actual[property] as object, expected[property] as object, property);
+                } else {
+                    if (expected[property] !== actual[property]) {
+                        throw new AssertionError({
+                            message: `${prefixedProperty} was expected to be ${expected[property]}, ` + `but was ${actual[property]}.`,
+                        });
+                    }
                 }
             }
         }
@@ -67,9 +58,9 @@ export function expectToBeCorrectEntity<T extends object>(actual: { entity: T; n
 /**
  * Checks that filtered is the correct representation of original as FilteredLearningObject.
  * @param filtered the representation as FilteredLearningObject
- * @param original the original entity added to the database
+ * @param original the data of the entity in the database that was filtered.
  */
-export function expectToBeCorrectFilteredLearningObject(filtered: FilteredLearningObject, original: LearningObject): void {
+export function expectToBeCorrectFilteredLearningObject(filtered: FilteredLearningObject, original: RequiredEntityData<LearningObject>): void {
     expect(filtered.uuid).toEqual(original.uuid);
     expect(filtered.version).toEqual(original.version);
     expect(filtered.language).toEqual(original.language);
@@ -97,54 +88,55 @@ export function expectToBeCorrectFilteredLearningObject(filtered: FilteredLearni
  * is a correct representation of the given learning path entity.
  *
  * @param learningPath The learning path returned by the retriever, service or endpoint
- * @param expectedEntity The expected entity
- * @param learningObjectsOnPath The learning objects on LearningPath. Necessary since some information in
- *                              the learning path returned from the API endpoint
+ * @param expected The learning path that should have been returned.
  */
-export function expectToBeCorrectLearningPath(
-    learningPath: LearningPath,
-    expectedEntity: LearningPathEntity,
-    learningObjectsOnPath: FilteredLearningObject[]
-): void {
-    expect(learningPath.hruid).toEqual(expectedEntity.hruid);
-    expect(learningPath.language).toEqual(expectedEntity.language);
-    expect(learningPath.description).toEqual(expectedEntity.description);
-    expect(learningPath.title).toEqual(expectedEntity.title);
+export function expectToBeCorrectLearningPath(learningPath: LearningPath, expected: LearningPath): void {
+    expect(learningPath.hruid).toEqual(expected.hruid);
+    expect(learningPath.language).toEqual(expected.language);
+    expect(learningPath.description).toEqual(expected.description);
+    expect(learningPath.title).toEqual(expected.title);
 
-    const keywords = new Set(learningObjectsOnPath.flatMap((it) => it.keywords || []));
-    expect(new Set(learningPath.keywords.split(' '))).toEqual(keywords);
+    expect(new Set(learningPath.keywords.split(' '))).toEqual(new Set(learningPath.keywords.split(' ')));
 
-    const targetAges = new Set(learningObjectsOnPath.flatMap((it) => it.targetAges || []));
-    expect(new Set(learningPath.target_ages)).toEqual(targetAges);
-    expect(learningPath.min_age).toEqual(Math.min(...targetAges));
-    expect(learningPath.max_age).toEqual(Math.max(...targetAges));
+    expect(new Set(learningPath.target_ages)).toEqual(new Set(expected.target_ages));
+    expect(learningPath.min_age).toEqual(Math.min(...expected.target_ages));
+    expect(learningPath.max_age).toEqual(Math.max(...expected.target_ages));
 
-    expect(learningPath.num_nodes).toEqual(expectedEntity.nodes.length);
-    expect(learningPath.image || null).toEqual(expectedEntity.image);
+    expect(learningPath.num_nodes).toEqual(expected.nodes.length);
+    expect(learningPath.image ?? null).toEqual(expected.image ?? null);
 
-    const expectedLearningPathNodes = new Map(
-        expectedEntity.nodes.map((node) => [
-            { learningObjectHruid: node.learningObjectHruid, language: node.language, version: node.version },
-            { startNode: node.startNode, transitions: node.transitions },
-        ])
-    );
-
-    for (const node of learningPath.nodes) {
-        const nodeKey = {
-            learningObjectHruid: node.learningobject_hruid,
-            language: node.language,
-            version: node.version,
-        };
-        expect(expectedLearningPathNodes.keys()).toContainEqual(nodeKey);
-        const expectedNode = [...expectedLearningPathNodes.entries()].find(
-            ([key, _]) => key.learningObjectHruid === nodeKey.learningObjectHruid && key.language === node.language && key.version === node.version
-        )![1];
-        expect(node.start_node).toEqual(expectedNode.startNode);
-
-        expect(new Set(node.transitions.map((it) => it.next.hruid))).toEqual(
-            new Set(expectedNode.transitions.map((it) => it.next.learningObjectHruid))
+    for (const node of expected.nodes) {
+        const correspondingNode = learningPath.nodes.find(
+            (it) => node.learningobject_hruid === it.learningobject_hruid && node.language === it.language && node.version === it.version
         );
-        expect(new Set(node.transitions.map((it) => it.next.language))).toEqual(new Set(expectedNode.transitions.map((it) => it.next.language)));
-        expect(new Set(node.transitions.map((it) => it.next.version))).toEqual(new Set(expectedNode.transitions.map((it) => it.next.version)));
+        expect(correspondingNode).toBeTruthy();
+        expect(Boolean(correspondingNode!.start_node)).toEqual(Boolean(node.start_node));
+
+        for (const transition of node.transitions) {
+            const correspondingTransition = correspondingNode!.transitions.find(
+                (it) =>
+                    it.next.hruid === transition.next.hruid &&
+                    it.next.language === transition.next.language &&
+                    it.next.version === transition.next.version
+            );
+            expect(correspondingTransition).toBeTruthy();
+        }
     }
 }
+
+/**
+ * Expect that the given result is a singleton list with exactly the given element.
+ */
+export function expectToHaveFoundPrecisely<T extends object>(expected: T, result: T[]): void {
+    expect(result).toHaveProperty('length');
+    expect(result.length).toBe(1);
+    expectToBeCorrectEntity(result[0], expected);
+}
+
+/**
+ * Expect that the given result is an empty list.
+ */
+export function expectToHaveFoundNothing<T>(result: T[]): void {
+    expect(result).toHaveProperty('length');
+    expect(result.length).toBe(0);
+}

backend/tests/test-utils/get-html-rendering.ts

@@ -0,0 +1,10 @@
+import { RequiredEntityData } from '@mikro-orm/core';
+import { loadTestAsset } from './load-test-asset';
+import { LearningObject } from '../../src/entities/content/learning-object.entity';
+import { envVars, getEnvVar } from '../../src/util/envVars';
+
+export function getHtmlRenderingForTestLearningObject(learningObject: RequiredEntityData<LearningObject>): string {
+    const userPrefix = getEnvVar(envVars.UserContentPrefix);
+    const cleanedHruid = learningObject.hruid.startsWith(userPrefix) ? learningObject.hruid.substring(userPrefix.length) : learningObject.hruid;
+    return loadTestAsset(`/content/learning-object-resources/${cleanedHruid}/rendering.txt`).toString();
+}

backend/tests/test-utils/load-test-asset.ts

@@ -1,10 +1,14 @@
 import fs from 'fs';
 import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const fileName = fileURLToPath(import.meta.url);
+const dirName = path.dirname(fileName);
 
 /**
  * Load the asset at the given path.
  * @param relPath Path of the asset relative to the test-assets folder.
  */
 export function loadTestAsset(relPath: string): Buffer {
-    return fs.readFileSync(path.resolve(__dirname, `../test-assets/${relPath}`));
+    return fs.readFileSync(path.resolve(dirName, `../test_assets/${relPath}`));
 }

backend/tests/test_assets/assignments/assignments.testdata.ts

@@ -2,11 +2,13 @@ import { EntityManager } from '@mikro-orm/core';
 import { Assignment } from '../../../src/entities/assignments/assignment.entity';
 import { Class } from '../../../src/entities/classes/class.entity';
 import { Language } from '@dwengo-1/common/util/language';
+import { testLearningPathWithConditions } from '../content/learning-paths.testdata';
+import { getClassWithTestleerlingAndTestleerkracht } from '../classes/classes.testdata';
 
 export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assignment[] {
-    const assignment01 = em.create(Assignment, {
+    assignment01 = em.create(Assignment, {
+        id: 21000,
         within: classes[0],
-        id: 1,
         title: 'dire straits',
         description: 'reading',
         learningPathHruid: 'id02',
@@ -14,9 +16,9 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
         groups: [],
     });
 
-    const assignment02 = em.create(Assignment, {
+    assignment02 = em.create(Assignment, {
+        id: 21001,
         within: classes[1],
-        id: 2,
         title: 'tool',
         description: 'reading',
         learningPathHruid: 'id01',
@@ -24,9 +26,9 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
         groups: [],
     });
 
-    const assignment03 = em.create(Assignment, {
+    assignment03 = em.create(Assignment, {
+        id: 21002,
         within: classes[0],
-        id: 3,
         title: 'delete',
         description: 'will be deleted',
         learningPathHruid: 'id02',
@@ -34,9 +36,9 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
         groups: [],
     });
 
-    const assignment04 = em.create(Assignment, {
+    assignment04 = em.create(Assignment, {
+        id: 21003,
         within: classes[0],
-        id: 4,
         title: 'another assignment',
         description: 'with a description',
         learningPathHruid: 'id01',
@@ -44,5 +46,41 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
         groups: [],
     });
 
-    return [assignment01, assignment02, assignment03, assignment04];
+    conditionalPathAssignment = em.create(Assignment, {
+        within: getClassWithTestleerlingAndTestleerkracht(),
+        id: 21004,
+        title: 'Assignment: Conditional Learning Path',
+        description: 'You have to do the testing learning path with a condition.',
+        learningPathHruid: testLearningPathWithConditions.hruid,
+        learningPathLanguage: testLearningPathWithConditions.language as Language,
+        groups: [],
+    });
+
+    return [assignment01, assignment02, assignment03, assignment04, conditionalPathAssignment];
+}
+
+let assignment01: Assignment;
+let assignment02: Assignment;
+let assignment03: Assignment;
+let assignment04: Assignment;
+let conditionalPathAssignment: Assignment;
+
+export function getAssignment01(): Assignment {
+    return assignment01;
+}
+
+export function getAssignment02(): Assignment {
+    return assignment02;
+}
+
+export function getAssignment03(): Assignment {
+    return assignment03;
+}
+
+export function getAssignment04(): Assignment {
+    return assignment04;
+}
+
+export function getConditionalPathAssignment(): Assignment {
+    return conditionalPathAssignment;
 }

backend/tests/test_assets/assignments/groups.testdata.ts

@@ -2,15 +2,17 @@ import { EntityManager } from '@mikro-orm/core';
 import { Group } from '../../../src/entities/assignments/group.entity';
 import { Assignment } from '../../../src/entities/assignments/assignment.entity';
 import { Student } from '../../../src/entities/users/student.entity';
+import { getConditionalPathAssignment } from './assignments.testdata';
+import { getTestleerling1 } from '../users/students.testdata';
 
 export function makeTestGroups(em: EntityManager, students: Student[], assignments: Assignment[]): Group[] {
     /*
      * Group #1 for Assignment #1 in class 'id01'
      * => Assigned to do learning path 'id02'
      */
-    const group01 = em.create(Group, {
+    group01 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 1,
+        groupNumber: 21001,
         members: students.slice(0, 2),
     });
 
@@ -18,9 +20,9 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      * Group #2 for Assignment #1 in class 'id01'
      * => Assigned to do learning path 'id02'
      */
-    const group02 = em.create(Group, {
+    group02 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 2,
+        groupNumber: 21002,
         members: students.slice(2, 4),
     });
 
@@ -28,9 +30,9 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      * Group #3 for Assignment #1 in class 'id01'
      * => Assigned to do learning path 'id02'
      */
-    const group03 = em.create(Group, {
+    group03 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 3,
+        groupNumber: 21003,
         members: students.slice(4, 6),
     });
 
@@ -38,9 +40,9 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      * Group #4 for Assignment #2 in class 'id02'
      * => Assigned to do learning path 'id01'
      */
-    const group04 = em.create(Group, {
+    group04 = em.create(Group, {
         assignment: assignments[1],
-        groupNumber: 4,
+        groupNumber: 21004,
         members: students.slice(3, 4),
     });
 
@@ -48,11 +50,51 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      * Group #5 for Assignment #4 in class 'id01'
      * => Assigned to do learning path 'id01'
      */
-    const group05 = em.create(Group, {
+    group05 = em.create(Group, {
         assignment: assignments[3],
-        groupNumber: 1,
+        groupNumber: 21001,
         members: students.slice(0, 2),
     });
 
-    return [group01, group02, group03, group04, group05];
+    /**
+     * Group 1 for the assignment of the testing learning path with conditions.
+     */
+    group1ConditionalLearningPath = em.create(Group, {
+        assignment: getConditionalPathAssignment(),
+        groupNumber: 1,
+        members: [getTestleerling1()],
+    });
+
+    return [group01, group02, group03, group04, group05, group1ConditionalLearningPath];
+}
+
+let group01: Group;
+let group02: Group;
+let group03: Group;
+let group04: Group;
+let group05: Group;
+let group1ConditionalLearningPath: Group;
+
+export function getTestGroup01(): Group {
+    return group01;
+}
+
+export function getTestGroup02(): Group {
+    return group02;
+}
+
+export function getTestGroup03(): Group {
+    return group03;
+}
+
+export function getTestGroup04(): Group {
+    return group04;
+}
+
+export function getTestGroup05(): Group {
+    return group05;
+}
+
+export function getGroup1ConditionalLearningPath(): Group {
+    return group1ConditionalLearningPath;
 }

backend/tests/test_assets/classes/class-join-requests.testdata.ts

@@ -2,31 +2,31 @@ import { EntityManager } from '@mikro-orm/core';
 import { ClassJoinRequest } from '../../../src/entities/classes/class-join-request.entity';
 import { Student } from '../../../src/entities/users/student.entity';
 import { Class } from '../../../src/entities/classes/class.entity';
-import { ClassJoinRequestStatus } from '@dwengo-1/common/util/class-join-request';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export function makeTestClassJoinRequests(em: EntityManager, students: Student[], classes: Class[]): ClassJoinRequest[] {
     const classJoinRequest01 = em.create(ClassJoinRequest, {
         requester: students[4],
         class: classes[1],
-        status: ClassJoinRequestStatus.Open,
+        status: ClassStatus.Open,
     });
 
     const classJoinRequest02 = em.create(ClassJoinRequest, {
         requester: students[2],
         class: classes[1],
-        status: ClassJoinRequestStatus.Open,
+        status: ClassStatus.Open,
     });
 
     const classJoinRequest03 = em.create(ClassJoinRequest, {
         requester: students[4],
         class: classes[2],
-        status: ClassJoinRequestStatus.Open,
+        status: ClassStatus.Open,
     });
 
     const classJoinRequest04 = em.create(ClassJoinRequest, {
         requester: students[3],
         class: classes[2],
-        status: ClassJoinRequestStatus.Open,
+        status: ClassStatus.Open,
     });
 
     return [classJoinRequest01, classJoinRequest02, classJoinRequest03, classJoinRequest04];

backend/tests/test_assets/classes/classes.testdata.ts

@@ -2,12 +2,14 @@ import { EntityManager } from '@mikro-orm/core';
 import { Class } from '../../../src/entities/classes/class.entity';
 import { Student } from '../../../src/entities/users/student.entity';
 import { Teacher } from '../../../src/entities/users/teacher.entity';
+import { getTestleerkracht1 } from '../users/teachers.testdata';
+import { getTestleerling1 } from '../users/students.testdata';
 
 export function makeTestClasses(em: EntityManager, students: Student[], teachers: Teacher[]): Class[] {
     const studentsClass01 = students.slice(0, 8);
     const teacherClass01: Teacher[] = teachers.slice(4, 5);
 
-    const class01 = em.create(Class, {
+    class01 = em.create(Class, {
         classId: '8764b861-90a6-42e5-9732-c0d9eb2f55f9',
         displayName: 'class01',
         teachers: teacherClass01,
@@ -17,7 +19,7 @@ export function makeTestClasses(em: EntityManager, students: Student[], teachers
     const studentsClass02: Student[] = students.slice(0, 2).concat(students.slice(3, 4));
     const teacherClass02: Teacher[] = teachers.slice(1, 2);
 
-    const class02 = em.create(Class, {
+    class02 = em.create(Class, {
         classId: '34d484a1-295f-4e9f-bfdc-3e7a23d86a89',
         displayName: 'class02',
         teachers: teacherClass02,
@@ -27,7 +29,7 @@ export function makeTestClasses(em: EntityManager, students: Student[], teachers
     const studentsClass03: Student[] = students.slice(1, 4);
     const teacherClass03: Teacher[] = teachers.slice(2, 3);
 
-    const class03 = em.create(Class, {
+    class03 = em.create(Class, {
         classId: '80dcc3e0-1811-4091-9361-42c0eee91cfa',
         displayName: 'class03',
         teachers: teacherClass03,
@@ -37,12 +39,45 @@ export function makeTestClasses(em: EntityManager, students: Student[], teachers
     const studentsClass04: Student[] = students.slice(0, 2);
     const teacherClass04: Teacher[] = teachers.slice(2, 3);
 
-    const class04 = em.create(Class, {
+    class04 = em.create(Class, {
         classId: '33d03536-83b8-4880-9982-9bbf2f908ddf',
         displayName: 'class04',
         teachers: teacherClass04,
         students: studentsClass04,
     });
 
-    return [class01, class02, class03, class04];
+    classWithTestleerlingAndTestleerkracht = em.create(Class, {
+        classId: 'a75298b5-18aa-471d-8eeb-5d77eb989393',
+        displayName: 'Testklasse',
+        teachers: [getTestleerkracht1()],
+        students: [getTestleerling1()],
+    });
+
+    return [class01, class02, class03, class04, classWithTestleerlingAndTestleerkracht];
+}
+
+let class01: Class;
+let class02: Class;
+let class03: Class;
+let class04: Class;
+let classWithTestleerlingAndTestleerkracht: Class;
+
+export function getClass01(): Class {
+    return class01;
+}
+
+export function getClass02(): Class {
+    return class02;
+}
+
+export function getClass03(): Class {
+    return class03;
+}
+
+export function getClass04(): Class {
+    return class04;
+}
+
+export function getClassWithTestleerlingAndTestleerkracht(): Class {
+    return classWithTestleerlingAndTestleerkracht;
 }

backend/tests/test_assets/classes/teacher-invitations.testdata.ts

@@ -2,30 +2,35 @@ import { EntityManager } from '@mikro-orm/core';
 import { TeacherInvitation } from '../../../src/entities/classes/teacher-invitation.entity';
 import { Teacher } from '../../../src/entities/users/teacher.entity';
 import { Class } from '../../../src/entities/classes/class.entity';
+import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export function makeTestTeacherInvitations(em: EntityManager, teachers: Teacher[], classes: Class[]): TeacherInvitation[] {
     const teacherInvitation01 = em.create(TeacherInvitation, {
         sender: teachers[1],
         receiver: teachers[0],
         class: classes[1],
+        status: ClassStatus.Open,
     });
 
     const teacherInvitation02 = em.create(TeacherInvitation, {
         sender: teachers[1],
         receiver: teachers[2],
         class: classes[1],
+        status: ClassStatus.Open,
     });
 
     const teacherInvitation03 = em.create(TeacherInvitation, {
         sender: teachers[2],
         receiver: teachers[0],
         class: classes[2],
+        status: ClassStatus.Open,
     });
 
     const teacherInvitation04 = em.create(TeacherInvitation, {
         sender: teachers[0],
         receiver: teachers[1],
         class: classes[0],
+        status: ClassStatus.Open,
     });
 
     return [teacherInvitation01, teacherInvitation02, teacherInvitation03, teacherInvitation04];