feat(backend): Repositories toegevoegd, databank unit-testbaar gemaakt.

backend/tests/data/users.test.ts

@@ -0,0 +1,33 @@
+import {initializeTests} from "../testutils"
+import {Student} from "../../src/entities/users/student.entity";
+import {describe, it, expect, beforeAll} from "vitest";
+import {getRepository} from "../../src/orm";
+import {StudentRepository} from "../../src/data/users/student-repository";
+
+const username = "teststudent";
+const firstName = "John";
+const lastName = "Doe";
+describe("StudentRepository", () => {
+    let studentRepository: StudentRepository;
+
+    beforeAll(async () => {
+        await initializeTests()
+        studentRepository = getRepository(Student) as StudentRepository;
+    });
+
+    it("should return the queried student after he was added", async () => {
+        await studentRepository.insert(new Student(username, firstName, lastName));
+
+        let retrievedStudent = await studentRepository.findByUsername(username);
+        expect(retrievedStudent).toBeTruthy();
+        expect(retrievedStudent?.firstName).toBe(firstName);
+        expect(retrievedStudent?.lastName).toBe(lastName);
+    });
+
+    it("should no longer return the queried student after he was removed again", async () => {
+        await studentRepository.deleteByUsername(username);
+
+        let retrievedStudent = await studentRepository.findByUsername(username);
+        expect(retrievedStudent).toBeNull();
+    });
+});