feat: tests voor backend/controllers/classes.ts geimplementeerd (FALEN NOG DOOR FOUTEN IN CODE)

backend/tests/controllers/classes.test.ts

@@ -0,0 +1,149 @@
+import { setupTestApp } from '../setup-tests.js';
+import { describe, it, expect, beforeAll, beforeEach, vi, Mock } from 'vitest';
+import { createClassHandler, getClassHandler, getClassStudentsHandler, getTeacherInvitationsHandler } from '../../src/controllers/classes.js';
+import { Request, Response } from 'express';
+import { getClassTeacherInvitations } from '../../src/services/class.js';
+
+async function fetchClass(id: string) {
+    const data = await fetch(`localhost:3000/class/${id}`);
+    return data;
+}
+
+vi.mock('./getClass', () => ({
+    getClass: vi.fn(),
+}));
+
+describe('Class controllers', () => {
+    let req: Partial<Request>;
+    let res: Partial<Response>;
+
+    let jsonMock: Mock;
+    let statusMock: Mock;
+
+    beforeAll(async () => {
+        await setupTestApp();
+    });
+  
+    beforeEach(async () =>  {
+        jsonMock = vi.fn();
+        statusMock = vi.fn().mockReturnThis();
+
+        res = {
+            json: jsonMock,
+            status: statusMock,
+        };
+    });
+
+    it('should return 404 and error if class is not found', async () => {
+        req = {
+            params: { id: 'doesnotexist'},
+        }
+
+        await getClassHandler(req as Request, res as Response);
+    
+        expect(statusMock).toHaveBeenCalledWith(404);
+        expect(jsonMock).toHaveBeenCalledWith({ error: 'Class not found' });
+    });
+
+    it('should return 200 if class is not found', async () => {
+        req = {
+            params: { id: 'id01'},
+        }
+
+        await getClassHandler(req as Request, res as Response);
+    
+        // status can either not be called or called with code 200
+        expect(
+            statusMock.mock.calls.length === 0 || statusMock.mock.calls.some(([arg]) => arg === 200)
+        ).toBe(true);
+    });
+
+    it('should return 201 for creating a new class', async () => {
+        req = {
+            body: { displayName: 'coolenieuweklas' },
+        };
+        
+        await createClassHandler(req as Request, res as Response);
+        
+        expect(statusMock).toHaveBeenCalledWith(201);
+        // TODO: return json should be a classDTO and not named (fixed in #130)
+        //expect(jsonMock).toHaveBeenCalledWith();
+        
+        // TODO: check if class is actually added to db
+    });
+    it.todo('return json should be a classDTO and not named (fixed in #130)')
+    it.todo('check if class is actually added to db');
+
+    it('should return 400 for trying to create a class without name', async () => {
+        req = {
+            body: {},
+        };
+
+        await createClassHandler(req as Request, res as Response);
+
+        expect(statusMock).toHaveBeenCalledWith(400);
+        expect(jsonMock).toHaveBeenCalledWith({ error: 'Missing one or more required fields: displayName' });
+    });
+
+    it('should return a list of students when calling getClassStudentsHandler', async () => {
+        req = {
+            params: { id: 'id01' },
+            query: {},
+        };
+
+        await getClassStudentsHandler(req as Request, res as Response);
+
+        expect(jsonMock).toHaveBeenCalledWith({ students: [
+            'DireStraits',
+            'Nirvana',
+            'Noordkaap',
+            'PinkFloyd',
+            'SmashingPumpkins',
+            'TheDoors',
+            'Tool'
+        ]});
+    });
+
+    it('should return 404 not found when calling getClassStudentsHandler on a non-existent class', async () => {
+        req = {
+            params: { id: 'doesnotexist' },
+            query: {},
+        };
+
+        await getClassStudentsHandler(req as Request, res as Response);
+        
+        // will fail until code is fixed
+        expect(statusMock).toHaveBeenCalledWith(404);
+        expect(jsonMock).toHaveBeenCalledWith({ error: 'Class not found' });
+    });
+
+    it('should return 200 and a list of teacher-invitations', async () => {
+        req = {
+            params: { id: 'id01' },
+            query: {},
+        };
+
+        await getTeacherInvitationsHandler(req as Request, res as Response);
+
+        expect(jsonMock).toHaveBeenCalledWith({"invitations": [
+            {
+            "class": "id01",
+            "receiver": "LimpBizkit",
+            "sender": "FooFighters",
+            }
+        ]});
+    });
+
+    it('should return 404 not found when calling teacher-invitations on a non-existent class', async () => {
+        req = {
+            params: { id: 'doesnotexist' },
+            query: {},
+        };
+
+        await getTeacherInvitationsHandler(req as Request, res as Response);
+
+        // will fail until code is fixed
+        expect(statusMock).toHaveBeenCalledWith(404);
+        expect(jsonMock).toHaveBeenCalledWith({ error: 'Class not found' });
+    });
+})