[BE] ranking, auth, stock-list 서비스 테스트 코드 작성

BE/src/auth/auth.service.spec.ts

@@ -0,0 +1,188 @@
+import { JwtService } from '@nestjs/jwt';
+import { ConfigService } from '@nestjs/config';
+import { Test } from '@nestjs/testing';
+import * as bcrypt from 'bcrypt';
+import { config } from 'dotenv';
+import { UnauthorizedException } from '@nestjs/common';
+import { User } from './user.entity';
+import { AuthCredentialsDto } from './dto/auth-credentials.dto';
+import { UserRepository } from './user.repository';
+import { AuthService } from './auth.service';
+
+config();
+
+describe('auth service 테스트', () => {
+  let authService: AuthService;
+  let userRepository: UserRepository;
+  let jwtService: JwtService;
+  let configService: ConfigService;
+
+  const mockAuthCredentials: AuthCredentialsDto = {
+    email: 'jindding',
+    password: '1234',
+  };
+
+  const mockUser: User = {
+    id: 1,
+    email: 'jindding',
+    password: '1234',
+    tutorial: false,
+    kakaoId: '',
+    currentRefreshToken: 'validRefreshToken',
+    currentRefreshTokenExpiresAt: null,
+    toAuthCredentialsDto: jest.fn().mockReturnValue({
+      email: 'jindding',
+      password: '1234',
+    }),
+    nickname: 'testNickname',
+    hasId: jest.fn(),
+    save: jest.fn(),
+    remove: jest.fn(),
+    softRemove: jest.fn(),
+    recover: jest.fn(),
+    reload: jest.fn(),
+  };
+
+  beforeEach(async () => {
+    const mockUserRepository = {
+      registerUser: jest.fn(),
+      registerKakaoUser: jest.fn(),
+      findOne: jest.fn(),
+      update: jest.fn(),
+    };
+
+    const mockJwtService = {
+      signAsync: jest.fn(),
+      verify: jest.fn(),
+    };
+
+    const mockConfigService = {
+      get: jest.fn(),
+    };
+
+    const module = await Test.createTestingModule({
+      providers: [
+        AuthService,
+        {
+          provide: UserRepository,
+          useValue: mockUserRepository,
+        },
+        {
+          provide: JwtService,
+          useValue: mockJwtService,
+        },
+        {
+          provide: ConfigService,
+          useValue: mockConfigService,
+        },
+      ],
+    }).compile();
+
+    authService = module.get(AuthService);
+    userRepository = module.get(UserRepository);
+    jwtService = module.get(JwtService);
+    configService = module.get(ConfigService);
+  });
+
+  it('회원가입 요청 시, DB에 회원 정보가 저장된다.', async () => {
+    const registerUserSpy = jest.spyOn(userRepository, 'registerUser');
+    await authService.signUp(mockAuthCredentials).then(() => {
+      expect(registerUserSpy).toHaveBeenCalledWith(mockAuthCredentials);
+    });
+  });
+
+  describe('로그인 테스트', () => {
+    it('DB에 존재하는 이메일과 비밀번호로 로그인 시, 토큰이 발급된다.', async () => {
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(mockUser);
+      jest.spyOn(jwtService, 'signAsync').mockResolvedValue('token');
+      /* eslint-disable @typescript-eslint/no-misused-promises */
+      /* eslint-disable func-names */
+      jest.spyOn(bcrypt, 'compare').mockImplementation(function () {
+        return Promise.resolve(true);
+      });
+      jest.spyOn(configService, 'get').mockReturnValue(process.env.JWT_SECRET);
+
+      const result = await authService.loginUser(mockAuthCredentials);
+
+      expect(result).toHaveProperty('accessToken');
+      expect(result).toHaveProperty('refreshToken');
+    });
+
+    it('DB에 존재하지 않는 이메일로 로그인 시, 에러가 발생한다.', async () => {
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(null);
+
+      await expect(
+        authService.loginUser(mockAuthCredentials),
+      ).rejects.toThrow();
+    });
+  });
+
+  describe('카카오 로그인 테스트', () => {
+    it('첫 카카오 로그인 시, 회원 가입 후 토큰이 발급된다.', async () => {
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(null);
+      jest
+        .spyOn(userRepository, 'registerKakaoUser')
+        .mockResolvedValue(undefined);
+      jest.spyOn(jwtService, 'signAsync').mockResolvedValue('token');
+
+      const result = await authService.kakaoLoginUser(mockAuthCredentials);
+
+      expect(
+        jest.spyOn(userRepository, 'registerKakaoUser'),
+      ).toHaveBeenCalled();
+      expect(result).toHaveProperty('accessToken');
+      expect(result).toHaveProperty('refreshToken');
+    });
+
+    it('이미 가입된 카카오 계정으로 로그인 시, 토큰이 발급된다.', async () => {
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(mockUser);
+      jest.spyOn(jwtService, 'signAsync').mockResolvedValue('token');
+
+      const result = await authService.kakaoLoginUser(mockAuthCredentials);
+
+      expect(jest.spyOn(userRepository, 'registerUser')).not.toHaveBeenCalled();
+      expect(result).toHaveProperty('accessToken');
+      expect(result).toHaveProperty('refreshToken');
+    });
+  });
+
+  describe('토큰 발급 테스트', () => {
+    it('유효한 리프레시 토큰으로 요청 시 , 새로운 액세스 토큰이 발급된다.', async () => {
+      const decodedToken = { email: mockUser.email };
+      const mockRefreshToken = mockUser.currentRefreshToken;
+
+      jest.spyOn(jwtService, 'verify').mockReturnValue(decodedToken);
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(mockUser);
+      jest
+        .spyOn(bcrypt, 'compare')
+        .mockImplementation(() => Promise.resolve(true));
+      jest.spyOn(jwtService, 'signAsync').mockResolvedValue('newAccessToken');
+      jest.spyOn(configService, 'get').mockReturnValue(process.env.JWT_SECRET);
+
+      const result = await authService.refreshToken(mockRefreshToken);
+
+      expect(result).toBe('newAccessToken');
+    });
+
+    it('유효하지 않은 리프레시 토큰으로 요청 시, 에러가 발생한다.', async () => {
+      jest.spyOn(jwtService, 'verify').mockImplementation(() => {
+        throw new Error('Invalid token');
+      });
+
+      await expect(authService.refreshToken('invalidToken')).rejects.toThrow();
+    });
+
+    it('저장된 리프레시 토큰과 일치하지 않을 경우, UnauthorizedException이 발생한다.', async () => {
+      const decodedToken = { email: mockUser.email };
+      jest.spyOn(jwtService, 'verify').mockReturnValue(decodedToken);
+      jest.spyOn(userRepository, 'findOne').mockResolvedValue(mockUser);
+      jest
+        .spyOn(bcrypt, 'compare')
+        .mockImplementation(() => Promise.resolve(false));
+
+      await expect(authService.refreshToken('invalidToken')).rejects.toThrow(
+        UnauthorizedException,
+      );
+    });
+  });
+});