[Test] UserService 단위 테스트

src/test/java/com/flab/tess/service/UserServiceTest.java

@@ -0,0 +1,91 @@
+package com.flab.tess.service;
+
+import com.flab.tess.domain.User;
+import com.flab.tess.dto.LoginRequest;
+import com.flab.tess.repository.UserRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+public class UserServiceTest {
+
+    @Mock
+    private UserRepository userRepository;
+
+    @InjectMocks
+    private UserService userService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void 회원_가입() {
+        User user = mock(User.class);
+        User encodedUser = mock(User.class);
+        when(user.encodePassword()).thenReturn(encodedUser);
+        when(userRepository.save(encodedUser)).thenReturn(encodedUser);
+
+        User result = userService.join(user);
+
+        assertNotNull(result);
+        verify(userRepository, times(1)).save(encodedUser);
+    }
+
+    @Test
+    void 로그인() {
+        String loginId = "testLoginId";
+        String password = "testPassword";
+
+        LoginRequest loginRequest = new LoginRequest(loginId, password);
+        User user = mock(User.class);
+
+        when(userRepository.findByLoginId(loginId)).thenReturn(Optional.of(user));
+        when(user.checkPassword(password)).thenReturn(true);
+
+        User loginResult = userService.login(loginRequest);
+
+        assertNotNull(loginResult);
+    }
+
+    @Test
+    void 잘못된_패스워드_로그인_예외() {
+
+        String loginId = "testLoginId";
+        String password = "invalidPassword";
+        LoginRequest loginRequest = new LoginRequest(loginId, password);
+        User user = mock(User.class);
+
+        when(userRepository.findByLoginId(loginId)).thenReturn(Optional.of(user));
+        when(user.checkPassword(password)).thenReturn(false);
+
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            userService.login(loginRequest);
+        });
+
+        assertEquals("잘못된 비밀번호입니다.", exception.getMessage());
+    }
+
+    @Test
+    void 가입되지_않은_아이디_예외() {
+        String loginId = "nonExistentUser";
+        String password = "password";
+        LoginRequest loginRequest = new LoginRequest(loginId, password);
+
+        when(userRepository.findByLoginId(loginId)).thenReturn(Optional.empty());
+
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+            userService.login(loginRequest);
+        });
+
+        assertEquals("가입되지 않은 아이디 입니다.", exception.getMessage());
+    }
+}