test(favorites): add unit tests for FavoritesController and FavoritesRepository with mocked dependencies

backend/src/favorites/favorites.controller.spec.ts

@@ -0,0 +1,82 @@
+jest.mock("uuid", () => ({
+	v4: jest.fn(() => "mocked-uuid"),
+}));
+
+jest.mock("@noble/post-quantum/ml-kem.js", () => ({
+	ml_kem768: {
+		keygen: jest.fn(),
+		encapsulate: jest.fn(),
+		decapsulate: jest.fn(),
+	},
+}));
+
+jest.mock("jose", () => ({
+	SignJWT: jest.fn().mockReturnValue({
+		setProtectedHeader: jest.fn().mockReturnThis(),
+		setIssuedAt: jest.fn().mockReturnThis(),
+		setExpirationTime: jest.fn().mockReturnThis(),
+		sign: jest.fn().mockResolvedValue("mocked-jwt"),
+	}),
+	jwtVerify: jest.fn(),
+}));
+
+import { Test, TestingModule } from "@nestjs/testing";
+import { AuthGuard } from "../auth/guards/auth.guard";
+import { AuthenticatedRequest } from "../common/interfaces/request.interface";
+import { FavoritesController } from "./favorites.controller";
+import { FavoritesService } from "./favorites.service";
+
+describe("FavoritesController", () => {
+	let controller: FavoritesController;
+	let service: FavoritesService;
+
+	const mockFavoritesService = {
+		addFavorite: jest.fn(),
+		removeFavorite: jest.fn(),
+		getUserFavorites: jest.fn(),
+	};
+
+	beforeEach(async () => {
+		const module: TestingModule = await Test.createTestingModule({
+			controllers: [FavoritesController],
+			providers: [{ provide: FavoritesService, useValue: mockFavoritesService }],
+		})
+			.overrideGuard(AuthGuard)
+			.useValue({ canActivate: () => true })
+			.compile();
+
+		controller = module.get<FavoritesController>(FavoritesController);
+		service = module.get<FavoritesService>(FavoritesService);
+	});
+
+	it("should be defined", () => {
+		expect(controller).toBeDefined();
+	});
+
+	describe("add", () => {
+		it("should call service.addFavorite", async () => {
+			const req = { user: { sub: "user-uuid" } } as AuthenticatedRequest;
+			await controller.add(req, "content-1");
+			expect(service.addFavorite).toHaveBeenCalledWith("user-uuid", "content-1");
+		});
+	});
+
+	describe("remove", () => {
+		it("should call service.removeFavorite", async () => {
+			const req = { user: { sub: "user-uuid" } } as AuthenticatedRequest;
+			await controller.remove(req, "content-1");
+			expect(service.removeFavorite).toHaveBeenCalledWith(
+				"user-uuid",
+				"content-1",
+			);
+		});
+	});
+
+	describe("list", () => {
+		it("should call service.getUserFavorites", async () => {
+			const req = { user: { sub: "user-uuid" } } as AuthenticatedRequest;
+			await controller.list(req, 10, 0);
+			expect(service.getUserFavorites).toHaveBeenCalledWith("user-uuid", 10, 0);
+		});
+	});
+});