memegoat/backend/src/contents/contents.service.spec.ts

jest.mock("uuid", () => ({
	v4: jest.fn(() => "mocked-uuid"),
}));

import { CACHE_MANAGER } from "@nestjs/cache-manager";
import { BadRequestException } from "@nestjs/common";
import { ConfigService } from "@nestjs/config";
import { Test, TestingModule } from "@nestjs/testing";
import { MediaService } from "../media/media.service";
import { S3Service } from "../s3/s3.service";
import { ContentsService } from "./contents.service";
import { ContentsRepository } from "./repositories/contents.repository";

describe("ContentsService", () => {
	let service: ContentsService;
	let s3Service: S3Service;
	let mediaService: MediaService;

	const mockContentsRepository = {
		findAll: jest.fn(),
		count: jest.fn(),
		create: jest.fn(),
		incrementViews: jest.fn(),
		incrementUsage: jest.fn(),
		softDelete: jest.fn(),
		findOne: jest.fn(),
		findBySlug: jest.fn(),
	};

	const mockS3Service = {
		getUploadUrl: jest.fn(),
		uploadFile: jest.fn(),
		getPublicUrl: jest.fn(),
	};

	const mockMediaService = {
		scanFile: jest.fn(),
		processImage: jest.fn(),
		processVideo: jest.fn(),
	};

	const mockConfigService = {
		get: jest.fn(),
	};

	const mockCacheManager = {
		clear: jest.fn(),
		del: jest.fn(),
	};

	beforeEach(async () => {
		jest.clearAllMocks();

		const module: TestingModule = await Test.createTestingModule({
			providers: [
				ContentsService,
				{ provide: ContentsRepository, useValue: mockContentsRepository },
				{ provide: S3Service, useValue: mockS3Service },
				{ provide: MediaService, useValue: mockMediaService },
				{ provide: ConfigService, useValue: mockConfigService },
				{ provide: CACHE_MANAGER, useValue: mockCacheManager },
			],
		}).compile();

		service = module.get<ContentsService>(ContentsService);
		s3Service = module.get<S3Service>(S3Service);
		mediaService = module.get<MediaService>(MediaService);
	});

	it("should be defined", () => {
		expect(service).toBeDefined();
	});

	describe("getUploadUrl", () => {
		it("should return an upload URL", async () => {
			mockS3Service.getUploadUrl.mockResolvedValue("http://s3/url");
			const result = await service.getUploadUrl("user1", "test.png");
			expect(result).toHaveProperty("url", "http://s3/url");
			expect(result).toHaveProperty("key");
			expect(result.key).toContain("uploads/user1/");
		});
	});

	describe("uploadAndProcess", () => {
		const file = {
			buffer: Buffer.from("test"),
			originalname: "test.png",
			mimetype: "image/png",
			size: 1000,
		} as Express.Multer.File;

		it("should upload and process an image", async () => {
			mockConfigService.get.mockReturnValue(1024); // max size
			mockMediaService.scanFile.mockResolvedValue({ isInfected: false });
			mockMediaService.processImage.mockResolvedValue({
				buffer: Buffer.from("processed"),
				extension: "webp",
				mimeType: "image/webp",
				size: 500,
			});
			mockContentsRepository.findBySlug.mockResolvedValue(null);
			mockContentsRepository.create.mockResolvedValue({ id: "content-id" });

			const result = await service.uploadAndProcess("user1", file, {
				title: "Meme",
				type: "meme",
			});

			expect(mediaService.scanFile).toHaveBeenCalled();
			expect(mediaService.processImage).toHaveBeenCalled();
			expect(s3Service.uploadFile).toHaveBeenCalled();
			expect(result).toEqual({ id: "content-id" });
		});

		it("should throw if file is infected", async () => {
			mockConfigService.get.mockReturnValue(1024);
			mockMediaService.scanFile.mockResolvedValue({
				isInfected: true,
				virusName: "Eicar",
			});

			await expect(
				service.uploadAndProcess("user1", file, { title: "X", type: "meme" }),
			).rejects.toThrow(BadRequestException);
		});
	});

	describe("findAll", () => {
		it("should return contents and total count", async () => {
			mockContentsRepository.count.mockResolvedValue(10);
			mockContentsRepository.findAll.mockResolvedValue([{ id: "1" }]);

			const result = await service.findAll({ limit: 10, offset: 0 });

			expect(result.totalCount).toBe(10);
			expect(result.data).toHaveLength(1);
		});
	});

	describe("incrementViews", () => {
		it("should increment views", async () => {
			mockContentsRepository.incrementViews.mockResolvedValue([
				{ id: "1", views: 1 },
			]);
			const result = await service.incrementViews("1");
			expect(mockContentsRepository.incrementViews).toHaveBeenCalledWith("1");
			expect(result[0].views).toBe(1);
		});
	});
});