test: create initial unit tests

package.json

@@ -98,6 +98,7 @@
       "^.+\\.(t|j)s$": "ts-jest"
     },
     "coverageDirectory": "./coverage",
+    "collectCoverageFrom": ["src/**/*.ts"],
     "testEnvironment": "node",
     "roots": [
       "<rootDir>/src/"

src/auth/auth.controller.spec.ts

@@ -0,0 +1,99 @@
+import { Test, TestingModule } from "@nestjs/testing";
+import type { Response } from "express";
+import { Logger } from "../logger/logger.service";
+import { User } from "../users/user.entity";
+import { AuthSession } from "./auth-session.entity";
+import { AuthController } from "./auth.controller";
+import { AuthService } from "./auth.service";
+import { COOKIE_REFRESH_TOKEN } from "./constants";
+
+describe("AuthController", () => {
+  let controller: AuthController;
+  let authService: AuthService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [AuthController],
+      providers: [
+        { provide: AuthService, useFactory: () => ({}) },
+        { provide: Logger, useClass: Logger },
+      ],
+    }).compile();
+
+    controller = module.get<AuthController>(AuthController);
+    authService = module.get<AuthService>(AuthService);
+  });
+
+  it("should be defined", () => {
+    expect(controller).toBeDefined();
+    expect(authService).toBeDefined();
+  });
+
+  describe("spotifyCallback", () => {
+    let user: User;
+    let res: Response;
+    let refreshToken: string;
+
+    beforeEach(() => {
+      user = { id: "user" } as User;
+      res = {
+        statusCode: 200,
+        cookie: jest.fn(),
+        redirect: jest.fn(),
+      } as unknown as Response;
+
+      refreshToken = "REFRESH_TOKEN";
+      authService.createSession = jest.fn().mockResolvedValue({ refreshToken });
+    });
+
+    it("creates session for user", async () => {
+      await controller.spotifyCallback(user, res);
+
+      expect(authService.createSession).toHaveBeenCalledTimes(1);
+      expect(authService.createSession).toHaveBeenCalledWith(user);
+    });
+
+    it("sets refresh token as cookie", async () => {
+      await controller.spotifyCallback(user, res);
+
+      expect(res.cookie).toHaveBeenCalledTimes(1);
+      expect(res.cookie).toHaveBeenCalledWith(
+        COOKIE_REFRESH_TOKEN,
+        refreshToken,
+        { httpOnly: true }
+      );
+    });
+
+    it("redirects to login success page", async () => {
+      await controller.spotifyCallback(user, res);
+
+      expect(res.redirect).toHaveBeenCalledTimes(1);
+      expect(res.redirect).toHaveBeenCalledWith(
+        "/login/success?source=spotify"
+      );
+    });
+  });
+
+  describe("refreshAccessToken", () => {
+    let session: AuthSession;
+    let accessToken: string;
+
+    beforeEach(() => {
+      session = { id: "session" } as AuthSession;
+      accessToken = "ACCESS_TOKEN";
+
+      authService.createAccessToken = jest
+        .fn()
+        .mockResolvedValue({ accessToken });
+    });
+
+    it("returns new access token", async () => {
+      await expect(controller.refreshAccessToken(session)).resolves.toEqual({
+        accessToken,
+      });
+
+      expect(authService.createAccessToken).toHaveBeenCalledTimes(1);
+      expect(authService.createAccessToken).toHaveBeenCalledWith(session);
+    });
+  });
+});

src/auth/auth.controller.ts

@@ -6,7 +6,6 @@ import {
   UseFilters,
   UseGuards,
 } from "@nestjs/common";
-import { ConfigService } from "@nestjs/config";
 import type { Response } from "express";
 import { User } from "../users/user.entity";
 import { AuthSession } from "./auth-session.entity";
@@ -22,10 +21,7 @@ import { SpotifyAuthFilter } from "./spotify.filter";
 
 @Controller("api/v1/auth")
 export class AuthController {
-  constructor(
-    private readonly authService: AuthService,
-    private readonly config: ConfigService
-  ) {}
+  constructor(private readonly authService: AuthService) {}
 
   @Get("spotify")
   @UseGuards(SpotifyAuthGuard)

src/auth/auth.service.spec.ts

@@ -1,18 +1,319 @@
+import { ForbiddenException } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { JwtService } from "@nestjs/jwt";
 import { Test, TestingModule } from "@nestjs/testing";
+import { User } from "../users/user.entity";
+import { UsersService } from "../users/users.service";
+import { AuthSession } from "./auth-session.entity";
+import { AuthSessionRepository } from "./auth-session.repository";
 import { AuthService } from "./auth.service";
+import { LoginDto } from "./dto/login.dto";
 
 describe("AuthService", () => {
   let service: AuthService;
+  let config: ConfigService;
+  let usersService: UsersService;
+  let jwtService: JwtService;
+  let authSessionRepository: AuthSessionRepository;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [AuthService],
+      providers: [
+        AuthService,
+        {
+          provide: ConfigService,
+          useFactory: () => ({ get: jest.fn().mockReturnValue("FOOBAR") }),
+        },
+        { provide: UsersService, useFactory: () => ({}) },
+        { provide: JwtService, useFactory: () => ({}) },
+        { provide: AuthSessionRepository, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<AuthService>(AuthService);
+    config = module.get<ConfigService>(ConfigService);
+    usersService = module.get<UsersService>(UsersService);
+    jwtService = module.get<JwtService>(JwtService);
+    authSessionRepository = module.get<AuthSessionRepository>(
+      AuthSessionRepository
+    );
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(config).toBeDefined();
+    expect(usersService).toBeDefined();
+    expect(jwtService).toBeDefined();
+    expect(authSessionRepository).toBeDefined();
+  });
+
+  describe("spotifyLogin", () => {
+    let loginDto: LoginDto;
+    let user: User;
+
+    beforeEach(() => {
+      loginDto = {
+        accessToken: "ACCESS_TOKEN",
+        refreshToken: "REFRESH_TOKEN",
+        profile: {
+          id: "FOOBAR",
+          displayName: "Max Mustermann",
+          photos: ["https://example.com/profile.jpeg"],
+        },
+      };
+
+      user = {
+        id: "USER",
+      } as User;
+
+      service.allowedByUserFilter = jest.fn().mockReturnValue(true);
+      usersService.createOrUpdate = jest.fn().mockResolvedValue(user);
+    });
+
+    it("returns the logged in user", async () => {
+      await expect(service.spotifyLogin(loginDto)).resolves.toEqual(user);
+    });
+
+    it("verifies that the user is allowed by the user filter", async () => {
+      await service.spotifyLogin(loginDto);
+
+      expect(service.allowedByUserFilter).toHaveBeenCalledTimes(1);
+      expect(service.allowedByUserFilter).toHaveBeenCalledWith(
+        loginDto.profile.id
+      );
+    });
+
+    it("throws ForbiddenException is user is not in the filter", async () => {
+      service.allowedByUserFilter = jest.fn().mockReturnValue(false);
+
+      await expect(service.spotifyLogin(loginDto)).rejects.toThrow(
+        ForbiddenException
+      );
+    });
+
+    it("updates the user profile with data from spotify", async () => {
+      await service.spotifyLogin(loginDto);
+
+      expect(usersService.createOrUpdate).toHaveBeenCalledTimes(1);
+      expect(usersService.createOrUpdate).toHaveBeenLastCalledWith({
+        displayName: "Max Mustermann",
+        photo: "https://example.com/profile.jpeg",
+        spotify: {
+          id: "FOOBAR",
+          accessToken: "ACCESS_TOKEN",
+          refreshToken: "REFRESH_TOKEN",
+        },
+      });
+    });
+  });
+
+  describe("createSession", () => {
+    let user: User;
+    let session: AuthSession;
+    let refreshToken: string;
+
+    beforeEach(() => {
+      user = { id: "USER" } as User;
+      session = {
+        id: "SESSION",
+        user,
+      } as AuthSession;
+      refreshToken = "REFRESH_TOKEN";
+
+      authSessionRepository.create = jest
+        .fn()
+        .mockReturnValue({ id: "SESSION" });
+
+      authSessionRepository.save = jest.fn().mockResolvedValue(undefined);
+
+      // @ts-expect-error
+      service.createRefreshToken = jest
+        .fn()
+        .mockResolvedValue({ refreshToken });
+    });
+
+    it("returns the session and refresh token", async () => {
+      await expect(service.createSession(user)).resolves.toEqual({
+        session,
+        refreshToken,
+      });
+    });
+
+    it("creates a new session", async () => {
+      await service.createSession(user);
+
+      expect(authSessionRepository.create).toHaveBeenCalledTimes(1);
+      expect(authSessionRepository.save).toHaveBeenCalledTimes(1);
+      expect(authSessionRepository.save).toHaveBeenCalledWith(session);
+    });
+
+    it("it creates a refresh token", async () => {
+      await service.createSession(user);
+
+      // @ts-expect-error
+      expect(service.createRefreshToken).toHaveBeenCalledTimes(1);
+      // @ts-expect-error
+      expect(service.createRefreshToken).toHaveBeenCalledWith(session);
+    });
+  });
+
+  describe("createRefreshToken", () => {
+    let session: AuthSession;
+    let refreshToken: string;
+
+    beforeEach(() => {
+      session = {
+        user: { id: "USER", displayName: "Max Mustermann" } as User,
+        id: "SESSION",
+      } as AuthSession;
+
+      refreshToken = "REFRESH_TOKEN";
+
+      jwtService.signAsync = jest.fn().mockResolvedValue(refreshToken);
+    });
+
+    it("returns the refreshToken", async () => {
+      // @ts-expect-error
+      await expect(service.createRefreshToken(session)).resolves.toEqual({
+        refreshToken,
+      });
+    });
+
+    it("creates a token with correct values", async () => {
+      // @ts-expect-error
+      service.sessionExpirationTime = "EXPIRATION_TIME";
+
+      // @ts-expect-error
+      await service.createRefreshToken(session);
+
+      expect(jwtService.signAsync).toHaveBeenCalledTimes(1);
+      expect(jwtService.signAsync).toHaveBeenCalledWith(
+        { sub: "USER", name: "Max Mustermann" },
+        {
+          jwtid: session.id,
+          expiresIn: "EXPIRATION_TIME",
+        }
+      );
+    });
+  });
+
+  describe("createAccessToken", () => {
+    let session: AuthSession;
+    let accessToken: string;
+
+    beforeEach(() => {
+      session = {
+        id: "AUTH_SESSION",
+        user: {
+          id: "USER",
+          displayName: "Max Mustermann",
+          photo: "https://example.com/picture.jpg",
+        },
+      } as AuthSession;
+
+      accessToken = "ACCESS_TOKEN";
+
+      jwtService.signAsync = jest.fn().mockResolvedValue(accessToken);
+    });
+
+    it("returns the access token", async () => {
+      await expect(service.createAccessToken(session)).resolves.toEqual({
+        accessToken,
+      });
+    });
+
+    it("throws ForbiddenException if the session is revoked", async () => {
+      session.revokedAt = new Date("2020-01-01T00:00:00Z");
+
+      await expect(service.createAccessToken(session)).rejects.toThrow(
+        ForbiddenException
+      );
+    });
+
+    it("creates a token with correct values", async () => {
+      await service.createAccessToken(session);
+
+      expect(jwtService.signAsync).toHaveBeenCalledTimes(1);
+      expect(jwtService.signAsync).toHaveBeenLastCalledWith({
+        sub: "USER",
+        name: "Max Mustermann",
+        picture: "https://example.com/picture.jpg",
+      });
+    });
+  });
+
+  describe("findSession", () => {
+    let session: AuthSession;
+
+    beforeEach(() => {
+      session = { id: "AUTH_SESSION" } as AuthSession;
+
+      authSessionRepository.findOne = jest.fn().mockResolvedValue(session);
+    });
+
+    it("returns the session", async () => {
+      await expect(service.findSession("AUTH_SESSION")).resolves.toEqual(
+        session
+      );
+
+      expect(authSessionRepository.findOne).toHaveBeenCalledTimes(1);
+      expect(authSessionRepository.findOne).toHaveBeenLastCalledWith(
+        "AUTH_SESSION"
+      );
+    });
+  });
+
+  describe("findUser", () => {
+    let user: User;
+
+    beforeEach(() => {
+      user = { id: "USER" } as User;
+
+      usersService.findById = jest.fn().mockResolvedValue(user);
+    });
+
+    it("returns the user", async () => {
+      await expect(service.findUser("USER")).resolves.toEqual(user);
+
+      expect(usersService.findById).toHaveBeenCalledTimes(1);
+      expect(usersService.findById).toHaveBeenLastCalledWith("USER");
+    });
+  });
+
+  describe("allowedByUserFilter", () => {
+    it("returns true if user filter is unset", () => {
+      // @ts-expect-error
+      service.userFilter = null;
+
+      expect(service.allowedByUserFilter("123")).toEqual(true);
+    });
+
+    it("returns true if the user filter is an empty string", () => {
+      // @ts-expect-error
+      service.userFilter = "";
+
+      expect(service.allowedByUserFilter("123")).toEqual(true);
+    });
+
+    it("returns true if the user is the only user in filter", () => {
+      // @ts-expect-error
+      service.userFilter = "123";
+
+      expect(service.allowedByUserFilter("123")).toEqual(true);
+    });
+
+    it("returns true if the user is one of the users in filter", () => {
+      // @ts-expect-error
+      service.userFilter = "123,456";
+
+      expect(service.allowedByUserFilter("456")).toEqual(true);
+    });
+
+    it("returns false if the user is not in the filter", () => {
+      // @ts-expect-error
+      service.userFilter = "123,456";
+
+      expect(service.allowedByUserFilter("789")).toEqual(false);
+    });
   });
 });

src/auth/strategies/refresh-token.strategy.spec.ts

@@ -0,0 +1,69 @@
+import { ForbiddenException, UnauthorizedException } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { Test, TestingModule } from "@nestjs/testing";
+import { AuthService } from "../auth.service";
+import { RefreshTokenStrategy } from "./refresh-token.strategy";
+
+describe("RefreshTokenStrategy", () => {
+  let strategy: RefreshTokenStrategy;
+  let authService: AuthService;
+  let configService: ConfigService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        RefreshTokenStrategy,
+        { provide: AuthService, useFactory: () => ({}) },
+        {
+          provide: ConfigService,
+          useFactory: () => ({ get: jest.fn().mockReturnValue("foobar") }),
+        },
+      ],
+    }).compile();
+
+    strategy = module.get<RefreshTokenStrategy>(RefreshTokenStrategy);
+    authService = module.get<AuthService>(AuthService);
+    configService = module.get<ConfigService>(ConfigService);
+  });
+
+  it("should be defined", () => {
+    expect(strategy).toBeDefined();
+    expect(authService).toBeDefined();
+    expect(configService).toBeDefined();
+  });
+
+  describe("validate", () => {
+    let session;
+    let payload;
+
+    beforeEach(() => {
+      payload = { jti: "123-foo-bar" };
+
+      session = { mock: "Session" };
+      authService.findSession = jest.fn().mockResolvedValue(session);
+    });
+
+    it("return session from authService", async () => {
+      await expect(strategy.validate(payload)).resolves.toEqual(session);
+
+      expect(authService.findSession).toHaveBeenCalledTimes(1);
+      expect(authService.findSession).toHaveBeenCalledWith(payload.jti);
+    });
+
+    it("throws UnauthorizedException if session does not exist", async () => {
+      authService.findSession = jest.fn().mockResolvedValue(undefined);
+
+      await expect(strategy.validate(payload)).rejects.toThrow(
+        UnauthorizedException
+      );
+    });
+
+    it("throws ForbiddenException is session is revoked", async () => {
+      session.revokedAt = "2021-01-01";
+
+      await expect(strategy.validate(payload)).rejects.toThrow(
+        ForbiddenException
+      );
+    });
+  });
+});

src/listens/listens.controller.spec.ts

@@ -1,18 +1,64 @@
 import { Test, TestingModule } from "@nestjs/testing";
+import { Pagination } from "nestjs-typeorm-paginate";
+import { User } from "../users/user.entity";
+import { GetListensFilterDto } from "./dto/get-listens.dto";
+import { Listen } from "./listen.entity";
 import { ListensController } from "./listens.controller";
+import { ListensService } from "./listens.service";
 
 describe("Listens Controller", () => {
   let controller: ListensController;
+  let listensService: ListensService;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       controllers: [ListensController],
+      providers: [{ provide: ListensService, useFactory: () => ({}) }],
     }).compile();
 
     controller = module.get<ListensController>(ListensController);
+    listensService = module.get<ListensService>(ListensService);
   });
 
   it("should be defined", () => {
     expect(controller).toBeDefined();
+    expect(listensService).toBeDefined();
+  });
+
+  describe("getRecentlyPlayed", () => {
+    let filter: GetListensFilterDto;
+    let user: User;
+    let listens: Pagination<Listen>;
+
+    beforeEach(() => {
+      filter = { time: { start: new Date(), end: new Date() } };
+      user = { id: "USER" } as User;
+
+      listens = { items: [{ id: "LISTEN" } as Listen] } as Pagination<Listen>;
+
+      listensService.getListens = jest.fn().mockResolvedValue(listens);
+    });
+
+    it("returns the listens", async () => {
+      await expect(
+        controller.getRecentlyPlayed(1, 10, filter, user)
+      ).resolves.toEqual(listens);
+
+      expect(listensService.getListens).toHaveBeenCalledTimes(1);
+      expect(listensService.getListens).toHaveBeenCalledWith({
+        page: 1,
+        limit: 10,
+        user,
+        filter,
+      });
+    });
+
+    it("clamps the limit to 100", async () => {
+      await controller.getRecentlyPlayed(1, 1000, filter, user);
+
+      expect(listensService.getListens).toHaveBeenCalledWith(
+        expect.objectContaining({ limit: 100 })
+      );
+    });
   });
 });

src/listens/listens.service.spec.ts

@@ -1,18 +1,152 @@
 import { Test, TestingModule } from "@nestjs/testing";
+import { IPaginationOptions, paginate } from "nestjs-typeorm-paginate";
+import { Track } from "../music-library/track.entity";
+import { User } from "../users/user.entity";
+import { CreateListenResponseDto } from "./dto/create-listen.dto";
+import { GetListensDto } from "./dto/get-listens.dto";
+import { Listen } from "./listen.entity";
+import { ListenRepository, ListenScopes } from "./listen.repository";
 import { ListensService } from "./listens.service";
 
+jest.mock("nestjs-typeorm-paginate");
+
 describe("ListensService", () => {
   let service: ListensService;
+  let listenRepository: ListenRepository;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [ListensService],
+      providers: [
+        ListensService,
+        { provide: ListenRepository, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<ListensService>(ListensService);
+    listenRepository = module.get<ListenRepository>(ListenRepository);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(listenRepository).toBeDefined();
+  });
+
+  describe("createListen", () => {
+    let user: User;
+    let track: Track;
+    let playedAt: Date;
+    let response: CreateListenResponseDto;
+    beforeEach(() => {
+      user = { id: "USER" } as User;
+      track = { id: "TRACK" } as Track;
+      playedAt = new Date("2021-01-01T00:00:00Z");
+
+      response = {
+        listen: {
+          id: "LISTEN",
+        } as Listen,
+        isDuplicate: true,
+      };
+      listenRepository.insertNoConflict = jest.fn().mockResolvedValue(response);
+    });
+
+    it("creates the listen", async () => {
+      await expect(
+        service.createListen({ user, track, playedAt })
+      ).resolves.toEqual(response);
+
+      expect(listenRepository.insertNoConflict).toHaveBeenCalledTimes(1);
+      expect(listenRepository.insertNoConflict).toHaveBeenLastCalledWith({
+        user,
+        track,
+        playedAt,
+      });
+    });
+  });
+
+  describe("getListens", () => {
+    let options: GetListensDto & IPaginationOptions;
+    let user: User;
+    let scopes: ListenScopes;
+
+    let listen: Listen;
+
+    beforeEach(() => {
+      user = { id: "USER" } as User;
+
+      options = {
+        page: 2,
+        limit: 45,
+        user,
+        filter: {},
+      };
+
+      // @ts-expect-error
+      scopes = {
+        byUser: jest.fn().mockReturnThis(),
+        duringInterval: jest.fn().mockReturnThis(),
+        leftJoinAndSelect: jest.fn().mockReturnThis(),
+        orderBy: jest.fn().mockReturnThis(),
+      };
+      // @ts-expect-error
+      listenRepository.scoped = scopes;
+
+      listen = {
+        id: "LISTEN",
+      } as Listen;
+
+      (paginate as jest.Mock).mockResolvedValue({ items: [listen] });
+    });
+
+    it("returns the listens", async () => {
+      await expect(service.getListens(options)).resolves.toEqual({
+        items: [listen],
+      });
+
+      expect(paginate).toHaveBeenCalledTimes(1);
+      expect(paginate).toHaveBeenCalledWith(scopes, {
+        page: options.page,
+        limit: options.limit,
+      });
+    });
+
+    it("filters for user", async () => {
+      await service.getListens(options);
+
+      expect(scopes.byUser).toHaveBeenCalledTimes(1);
+      expect(scopes.byUser).toHaveBeenCalledWith(user);
+    });
+
+    it("filters for time", async () => {
+      await service.getListens(options);
+      expect(scopes.duringInterval).toHaveBeenCalledTimes(0);
+
+      jest.clearAllMocks();
+
+      options.filter.time = {
+        start: new Date("2021-01-01T00:00:00Z"),
+        end: new Date("2021-01-01T00:00:00Z"),
+      };
+
+      await service.getListens(options);
+
+      expect(scopes.duringInterval).toHaveBeenCalledTimes(1);
+      expect(scopes.duringInterval).toHaveBeenCalledWith(options.filter.time);
+    });
+  });
+
+  describe("getScopedQueryBuilder", () => {
+    let scopes: ListenScopes;
+
+    beforeEach(() => {
+      // @ts-expect-error
+      scopes = { id: "SCOPES" };
+      // @ts-expect-error
+      listenRepository.scoped = scopes;
+    });
+
+    it("returns the scoped query builder", async () => {
+      expect(service.getScopedQueryBuilder()).toEqual(scopes);
+    });
   });
 });

src/metrics/metrics-auth.middleware.spec.ts

@@ -0,0 +1,74 @@
+import { UnauthorizedException } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { Test, TestingModule } from "@nestjs/testing";
+import { IncomingMessage } from "http";
+import { MetricsAuthMiddleware } from "./metrics-auth.middleware";
+
+describe("MetricsAuthMiddleware", () => {
+  let middleware: MetricsAuthMiddleware;
+  let config: ConfigService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        MetricsAuthMiddleware,
+        {
+          provide: ConfigService,
+          useFactory: () => ({
+            get: jest
+              .fn()
+              .mockReturnValueOnce("foo") // Username
+              .mockReturnValueOnce("bar"), // Password
+          }),
+        },
+      ],
+    }).compile();
+
+    middleware = module.get<MetricsAuthMiddleware>(MetricsAuthMiddleware);
+    config = module.get<ConfigService>(ConfigService);
+  });
+
+  it("should be defined", () => {
+    expect(middleware).toBeDefined();
+    expect(config).toBeDefined();
+  });
+
+  describe("use", () => {
+    let req: IncomingMessage;
+    let res: any;
+    let next: () => void;
+
+    beforeEach(() => {
+      req = {
+        headers: { authorization: `Basic Zm9vOmJhcg==` },
+      } as IncomingMessage; // Buffer.from("foo:bar").toString("base64")
+
+      res = {};
+
+      next = jest.fn();
+    });
+
+    it("calls next", async () => {
+      middleware.use(req, res, next);
+
+      expect(next).toHaveBeenCalledTimes(1);
+      expect(next).toHaveBeenCalledWith();
+    });
+
+    it("throws UnauthorizedException if header is not set", async () => {
+      delete req.headers.authorization;
+
+      expect(() => middleware.use(req, res, next)).toThrow(
+        UnauthorizedException
+      );
+    });
+
+    it("throws UnauthorizedException if header does not match", async () => {
+      req.headers.authorization = `Basic doesnotmatch`;
+
+      expect(() => middleware.use(req, res, next)).toThrow(
+        UnauthorizedException
+      );
+    });
+  });
+});

src/music-library/music-library.service.spec.ts

@@ -1,18 +1,399 @@
 import { Test, TestingModule } from "@nestjs/testing";
+import { PostgresErrorCodes } from "../database/error-codes";
+import { Album } from "./album.entity";
+import { AlbumRepository } from "./album.repository";
+import { Artist } from "./artist.entity";
+import { ArtistRepository } from "./artist.repository";
+import { CreateAlbumDto } from "./dto/create-album.dto";
+import { CreateArtistDto } from "./dto/create-artist.dto";
+import { CreateGenreDto } from "./dto/create-genre.dto";
+import { CreateTrackDto } from "./dto/create-track.dto";
+import { Genre } from "./genre.entity";
+import { GenreRepository } from "./genre.repository";
 import { MusicLibraryService } from "./music-library.service";
+import { Track } from "./track.entity";
+import { TrackRepository } from "./track.repository";
 
 describe("MusicLibraryService", () => {
   let service: MusicLibraryService;
+  let albumRepository: AlbumRepository;
+  let artistRepository: ArtistRepository;
+  let genreRepository: GenreRepository;
+  let trackRepository: TrackRepository;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [MusicLibraryService],
+      providers: [
+        MusicLibraryService,
+        { provide: AlbumRepository, useFactory: () => ({}) },
+        { provide: ArtistRepository, useFactory: () => ({}) },
+        { provide: GenreRepository, useFactory: () => ({}) },
+        { provide: TrackRepository, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<MusicLibraryService>(MusicLibraryService);
+    albumRepository = module.get<AlbumRepository>(AlbumRepository);
+    artistRepository = module.get<ArtistRepository>(ArtistRepository);
+    genreRepository = module.get<GenreRepository>(GenreRepository);
+    trackRepository = module.get<TrackRepository>(TrackRepository);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(albumRepository).toBeDefined();
+    expect(artistRepository).toBeDefined();
+    expect(genreRepository).toBeDefined();
+    expect(trackRepository).toBeDefined();
+  });
+
+  describe("Artist", () => {
+    describe("findArtist", () => {
+      it("returns the entity", async () => {
+        const artist = {
+          id: "ARTIST",
+        };
+        artistRepository.findOne = jest.fn().mockResolvedValue(artist);
+
+        await expect(
+          service.findArtist({ spotify: { id: "spotify_artist" } })
+        ).resolves.toEqual(artist);
+
+        expect(artistRepository.findOne).toHaveBeenCalledTimes(1);
+        expect(artistRepository.findOne).toHaveBeenCalledWith({
+          where: { spotify: { id: "spotify_artist" } },
+        });
+      });
+    });
+
+    describe("createArtist", () => {
+      let createArtistDto: CreateArtistDto;
+      let artist: Artist;
+
+      beforeEach(() => {
+        createArtistDto = {
+          name: "Foo",
+          spotify: {
+            id: "SPOTIFY_ID",
+          },
+        } as CreateArtistDto;
+
+        artist = {
+          ...createArtistDto,
+          id: "ARTIST",
+        } as Artist;
+
+        artistRepository.create = jest.fn().mockReturnValue({ id: "ARTIST" });
+        artistRepository.save = jest.fn().mockResolvedValue(undefined);
+      });
+
+      it("creates the entity", async () => {
+        await expect(service.createArtist(createArtistDto)).resolves.toEqual(
+          artist
+        );
+
+        expect(artistRepository.create).toHaveBeenCalledTimes(1);
+        expect(artistRepository.save).toHaveBeenCalledTimes(1);
+        expect(artistRepository.save).toHaveBeenCalledWith(artist);
+      });
+
+      it("returns the entity on a unique violation", async () => {
+        artist.id = "ARTIST2";
+        service.findArtist = jest
+          .fn()
+          .mockResolvedValue({ ...artist, id: "ARTIST2" });
+
+        const uniqueViolationError = new Error();
+        // @ts-expect-error
+        uniqueViolationError.code = PostgresErrorCodes.UNIQUE_VIOLATION;
+        // @ts-expect-error
+        uniqueViolationError.constraint = "IDX_ARTIST_SPOTIFY_ID";
+
+        artistRepository.save = jest
+          .fn()
+          .mockRejectedValue(uniqueViolationError);
+
+        await expect(service.createArtist(createArtistDto)).resolves.toEqual(
+          artist
+        );
+
+        expect(service.findArtist).toHaveBeenCalledTimes(1);
+        expect(service.findArtist).toHaveBeenCalledWith({
+          spotify: { id: "SPOTIFY_ID" },
+        });
+      });
+
+      it("throws on generic errors", async () => {
+        artistRepository.save = jest
+          .fn()
+          .mockRejectedValue(new Error("Generic Error"));
+
+        await expect(service.createArtist(createArtistDto)).rejects.toThrow(
+          "Generic Error"
+        );
+      });
+    });
+  });
+
+  describe("Album", () => {
+    describe("findAlbum", () => {
+      it("returns the entity", async () => {
+        const album = {
+          id: "ALBUM",
+        };
+        albumRepository.findOne = jest.fn().mockResolvedValue(album);
+
+        await expect(
+          service.findAlbum({ spotify: { id: "spotify_album" } })
+        ).resolves.toEqual(album);
+
+        expect(albumRepository.findOne).toHaveBeenCalledTimes(1);
+        expect(albumRepository.findOne).toHaveBeenCalledWith({
+          where: { spotify: { id: "spotify_album" } },
+        });
+      });
+    });
+
+    describe("createAlbum", () => {
+      let createAlbumDto: CreateAlbumDto;
+      let album: Album;
+
+      beforeEach(() => {
+        createAlbumDto = {
+          name: "Foo",
+          spotify: {
+            id: "SPOTIFY_ID",
+          },
+        } as CreateAlbumDto;
+
+        album = {
+          ...createAlbumDto,
+          id: "ALBUM",
+        } as Album;
+
+        albumRepository.create = jest.fn().mockReturnValue({ id: "ALBUM" });
+        albumRepository.save = jest.fn().mockResolvedValue(undefined);
+      });
+
+      it("creates the entity", async () => {
+        await expect(service.createAlbum(createAlbumDto)).resolves.toEqual(
+          album
+        );
+
+        expect(albumRepository.create).toHaveBeenCalledTimes(1);
+        expect(albumRepository.save).toHaveBeenCalledTimes(1);
+        expect(albumRepository.save).toHaveBeenCalledWith(album);
+      });
+
+      it("returns the entity on a unique violation", async () => {
+        album.id = "ALBUM2";
+        service.findAlbum = jest
+          .fn()
+          .mockResolvedValue({ ...album, id: "ALBUM2" });
+
+        const uniqueViolationError = new Error();
+        // @ts-expect-error
+        uniqueViolationError.code = PostgresErrorCodes.UNIQUE_VIOLATION;
+        // @ts-expect-error
+        uniqueViolationError.constraint = "IDX_ALBUM_SPOTIFY_ID";
+
+        albumRepository.save = jest
+          .fn()
+          .mockRejectedValue(uniqueViolationError);
+
+        await expect(service.createAlbum(createAlbumDto)).resolves.toEqual(
+          album
+        );
+
+        expect(service.findAlbum).toHaveBeenCalledTimes(1);
+        expect(service.findAlbum).toHaveBeenCalledWith({
+          spotify: { id: "SPOTIFY_ID" },
+        });
+      });
+
+      it("throws on generic errors", async () => {
+        albumRepository.save = jest
+          .fn()
+          .mockRejectedValue(new Error("Generic Error"));
+
+        await expect(service.createAlbum(createAlbumDto)).rejects.toThrow(
+          "Generic Error"
+        );
+      });
+    });
+  });
+
+  describe("Genre", () => {
+    describe("findGenre", () => {
+      it("returns the entity", async () => {
+        const genre = {
+          id: "GENRE",
+          name: "Foo",
+        };
+        genreRepository.findOne = jest.fn().mockResolvedValue(genre);
+
+        await expect(service.findGenre({ name: "Foo" })).resolves.toEqual(
+          genre
+        );
+
+        expect(genreRepository.findOne).toHaveBeenCalledTimes(1);
+        expect(genreRepository.findOne).toHaveBeenCalledWith({
+          where: { name: "Foo" },
+        });
+      });
+    });
+
+    describe("createGenre", () => {
+      let createGenreDto: CreateGenreDto;
+      let genre: Genre;
+
+      beforeEach(() => {
+        createGenreDto = {
+          name: "Foo",
+        } as CreateGenreDto;
+
+        genre = {
+          ...createGenreDto,
+          id: "GENRE",
+        } as Genre;
+
+        genreRepository.create = jest.fn().mockReturnValue({ id: "GENRE" });
+        genreRepository.save = jest.fn().mockResolvedValue(undefined);
+      });
+
+      it("creates the entity", async () => {
+        await expect(service.createGenre(createGenreDto)).resolves.toEqual(
+          genre
+        );
+
+        expect(genreRepository.create).toHaveBeenCalledTimes(1);
+        expect(genreRepository.save).toHaveBeenCalledTimes(1);
+        expect(genreRepository.save).toHaveBeenCalledWith(genre);
+      });
+
+      it("returns the entity on a unique violation", async () => {
+        genre.id = "GENRE2";
+        service.findGenre = jest
+          .fn()
+          .mockResolvedValue({ ...genre, id: "GENRE2" });
+
+        const uniqueViolationError = new Error();
+        // @ts-expect-error
+        uniqueViolationError.code = PostgresErrorCodes.UNIQUE_VIOLATION;
+        // @ts-expect-error
+        uniqueViolationError.constraint = "IDX_GENRE_NAME";
+
+        genreRepository.save = jest
+          .fn()
+          .mockRejectedValue(uniqueViolationError);
+
+        await expect(service.createGenre(createGenreDto)).resolves.toEqual(
+          genre
+        );
+
+        expect(service.findGenre).toHaveBeenCalledTimes(1);
+        expect(service.findGenre).toHaveBeenCalledWith({
+          name: "Foo",
+        });
+      });
+
+      it("throws on generic errors", async () => {
+        genreRepository.save = jest
+          .fn()
+          .mockRejectedValue(new Error("Generic Error"));
+
+        await expect(service.createGenre(createGenreDto)).rejects.toThrow(
+          "Generic Error"
+        );
+      });
+    });
+  });
+
+  describe("Track", () => {
+    describe("findTrack", () => {
+      it("returns the entity", async () => {
+        const track = {
+          id: "TRACK",
+        };
+        trackRepository.findOne = jest.fn().mockResolvedValue(track);
+
+        await expect(
+          service.findTrack({ spotify: { id: "spotify_track" } })
+        ).resolves.toEqual(track);
+
+        expect(trackRepository.findOne).toHaveBeenCalledTimes(1);
+        expect(trackRepository.findOne).toHaveBeenCalledWith({
+          where: { spotify: { id: "spotify_track" } },
+        });
+      });
+    });
+
+    describe("createTrack", () => {
+      let createTrackDto: CreateTrackDto;
+      let track: Track;
+
+      beforeEach(() => {
+        createTrackDto = {
+          name: "Foo",
+          spotify: {
+            id: "SPOTIFY_ID",
+          },
+        } as CreateTrackDto;
+
+        track = {
+          ...createTrackDto,
+          id: "TRACK",
+        } as Track;
+
+        trackRepository.create = jest.fn().mockReturnValue({ id: "TRACK" });
+        trackRepository.save = jest.fn().mockResolvedValue(undefined);
+      });
+
+      it("creates the entity", async () => {
+        await expect(service.createTrack(createTrackDto)).resolves.toEqual(
+          track
+        );
+
+        expect(trackRepository.create).toHaveBeenCalledTimes(1);
+        expect(trackRepository.save).toHaveBeenCalledTimes(1);
+        expect(trackRepository.save).toHaveBeenCalledWith(track);
+      });
+
+      it("returns the entity on a unique violation", async () => {
+        track.id = "TRACK2";
+        service.findTrack = jest
+          .fn()
+          .mockResolvedValue({ ...track, id: "TRACK2" });
+
+        const uniqueViolationError = new Error();
+        // @ts-expect-error
+        uniqueViolationError.code = PostgresErrorCodes.UNIQUE_VIOLATION;
+        // @ts-expect-error
+        uniqueViolationError.constraint = "IDX_TRACK_SPOTIFY_ID";
+
+        trackRepository.save = jest
+          .fn()
+          .mockRejectedValue(uniqueViolationError);
+
+        await expect(service.createTrack(createTrackDto)).resolves.toEqual(
+          track
+        );
+
+        expect(service.findTrack).toHaveBeenCalledTimes(1);
+        expect(service.findTrack).toHaveBeenCalledWith({
+          spotify: { id: "SPOTIFY_ID" },
+        });
+      });
+
+      it("throws on generic errors", async () => {
+        trackRepository.save = jest
+          .fn()
+          .mockRejectedValue(new Error("Generic Error"));
+
+        await expect(service.createTrack(createTrackDto)).rejects.toThrow(
+          "Generic Error"
+        );
+      });
+    });
   });
 });

src/music-library/music-library.service.ts

@@ -80,6 +80,8 @@ export class MusicLibraryService {
         // executed and it is now available in the database for use to retrieve
         return this.findAlbum({ spotify: { id: data.spotify.id } });
       }
+
+      throw err;
     }
 
     return album;
@@ -139,6 +141,8 @@ export class MusicLibraryService {
         // executed and it is now available in the database for use to retrieve
         return this.findTrack({ spotify: { id: data.spotify.id } });
       }
+
+      throw err;
     }
 
     return track;

src/reports/reports.controller.spec.ts

@@ -1,18 +1,23 @@
 import { Test, TestingModule } from "@nestjs/testing";
 import { ReportsController } from "./reports.controller";
+import { ReportsService } from "./reports.service";
 
 describe("Reports Controller", () => {
   let controller: ReportsController;
+  let reportsService: ReportsService;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       controllers: [ReportsController],
+      providers: [{ provide: ReportsService, useFactory: () => ({}) }],
     }).compile();
 
     controller = module.get<ReportsController>(ReportsController);
+    reportsService = module.get<ReportsService>(ReportsService);
   });
 
   it("should be defined", () => {
     expect(controller).toBeDefined();
+    expect(reportsService).toBeDefined();
   });
 });

src/reports/reports.service.spec.ts

@@ -1,18 +1,25 @@
 import { Test, TestingModule } from "@nestjs/testing";
+import { ListensService } from "../listens/listens.service";
 import { ReportsService } from "./reports.service";
 
 describe("ReportsService", () => {
   let service: ReportsService;
+  let listensService: ListensService;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [ReportsService],
+      providers: [
+        ReportsService,
+        { provide: ListensService, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<ReportsService>(ReportsService);
+    listensService = module.get<ListensService>(ListensService);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(listensService).toBeDefined();
   });
 });

src/sources/spotify/spotify-api/spotify-api.service.spec.ts

@@ -1,18 +1,25 @@
+import { HttpService } from "@nestjs/common";
 import { Test, TestingModule } from "@nestjs/testing";
 import { SpotifyApiService } from "./spotify-api.service";
 
 describe("SpotifyApiService", () => {
   let service: SpotifyApiService;
+  let httpService: HttpService;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [SpotifyApiService],
+      providers: [
+        SpotifyApiService,
+        { provide: HttpService, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<SpotifyApiService>(SpotifyApiService);
+    httpService = module.get<HttpService>(HttpService);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(httpService).toBeDefined();
   });
 });

src/sources/spotify/spotify.service.spec.ts

@@ -1,18 +1,50 @@
+import { Logger } from "@nestjs/common";
 import { Test, TestingModule } from "@nestjs/testing";
+import { ListensService } from "../../listens/listens.service";
+import { MusicLibraryService } from "../../music-library/music-library.service";
+import { UsersService } from "../../users/users.service";
+import { SpotifyApiService } from "./spotify-api/spotify-api.service";
+import { SpotifyAuthService } from "./spotify-auth/spotify-auth.service";
 import { SpotifyService } from "./spotify.service";
 
 describe("SpotifyService", () => {
   let service: SpotifyService;
+  let usersService: UsersService;
+  let listensService: ListensService;
+  let musicLibraryService: MusicLibraryService;
+  let spotifyApi: SpotifyApiService;
+  let spotifyAuth: SpotifyAuthService;
+  let logger: Logger;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [SpotifyService],
+      providers: [
+        SpotifyService,
+        { provide: UsersService, useFactory: () => ({}) },
+        { provide: ListensService, useFactory: () => ({}) },
+        { provide: MusicLibraryService, useFactory: () => ({}) },
+        { provide: SpotifyApiService, useFactory: () => ({}) },
+        { provide: SpotifyAuthService, useFactory: () => ({}) },
+        { provide: Logger, useValue: new Logger() },
+      ],
     }).compile();
 
     service = module.get<SpotifyService>(SpotifyService);
+    usersService = module.get<UsersService>(UsersService);
+    listensService = module.get<ListensService>(ListensService);
+    musicLibraryService = module.get<MusicLibraryService>(MusicLibraryService);
+    spotifyApi = module.get<SpotifyApiService>(SpotifyApiService);
+    spotifyAuth = module.get<SpotifyAuthService>(SpotifyAuthService);
+    logger = module.get<Logger>(Logger);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(usersService).toBeDefined();
+    expect(listensService).toBeDefined();
+    expect(musicLibraryService).toBeDefined();
+    expect(spotifyApi).toBeDefined();
+    expect(spotifyAuth).toBeDefined();
+    expect(logger).toBeDefined();
   });
 });

src/users/users.service.spec.ts

@@ -1,18 +1,25 @@
 import { Test, TestingModule } from "@nestjs/testing";
+import { UserRepository } from "./user.repository";
 import { UsersService } from "./users.service";
 
 describe("UsersService", () => {
   let service: UsersService;
+  let userRepository: UserRepository;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
-      providers: [UsersService],
+      providers: [
+        UsersService,
+        { provide: UserRepository, useFactory: () => ({}) },
+      ],
     }).compile();
 
     service = module.get<UsersService>(UsersService);
+    userRepository = module.get<UserRepository>(UserRepository);
   });
 
   it("should be defined", () => {
     expect(service).toBeDefined();
+    expect(userRepository).toBeDefined();
   });
 });

test/app.e2e-spec.ts

@@ -15,10 +15,6 @@ describe("AppController (e2e)", () => {
     await app.init();
   });
 
-  it("/ (GET)", () => {
-    return request(app.getHttpServer())
-      .get("/")
-      .expect(200)
-      .expect("Hello World!");
-  });
+  it("/ (GET)", () =>
+    request(app.getHttpServer()).get("/").expect(200).expect("Hello World!"));
 });