diff --git a/src/test/java/com/example/g8backend/service/UserServiceTest.java b/src/test/java/com/example/g8backend/service/UserServiceTest.java
new file mode 100644
index 0000000..f86da8d
--- /dev/null
+++ b/src/test/java/com/example/g8backend/service/UserServiceTest.java
@@ -0,0 +1,80 @@
+package com.example.g8backend.service;
+
+import com.example.g8backend.entity.User;
+import com.example.g8backend.mapper.UserMapper;
+import com.example.g8backend.service.impl.UserServiceImpl;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class UserServiceTest {
+
+    @Mock
+    private UserMapper userMapper;
+
+    @InjectMocks
+    private UserServiceImpl userService;
+
+    @Test
+    void getUserByName_ShouldReturnUser_WhenNameExists() {
+        // 准备测试数据
+        String name = "Alice";
+        User expectedUser = new User();
+        expectedUser.setUserName(name);
+
+        // 模拟Mapper行为
+        when(userMapper.getUserByName(name)).thenReturn(expectedUser);
+
+        // 调用被测试方法
+        User actualUser = userService.getUserByName(name);
+
+        // 验证结果
+        assertEquals(expectedUser, actualUser);
+        verify(userMapper, times(1)).getUserByName(name);
+    }
+
+    @Test
+    void getUserByEmail_ShouldReturnUser_WhenEmailExists() {
+        String email = "xxi13552467509@163.com";
+        User expectedUser = new User();
+        expectedUser.setEmail(email);
+
+        when(userMapper.getUserByEmail(email)).thenReturn(expectedUser);
+
+        User actualUser = userService.getUserByEmail(email);
+
+        assertEquals(expectedUser, actualUser);
+        verify(userMapper, times(1)).getUserByEmail(email);
+    }
+
+    @Test
+    void getUserByPasskey_ShouldReturnUser_WhenPasskeyExists() {
+        String passkey = "secret123";
+        User expectedUser = new User();
+        expectedUser.setPasskey(passkey);
+
+        when(userMapper.getUserByPasskey(passkey)).thenReturn(expectedUser);
+
+        User actualUser = userService.getUserByPasskey(passkey);
+
+        assertEquals(expectedUser, actualUser);
+        verify(userMapper, times(1)).getUserByPasskey(passkey);
+    }
+
+    @Test
+    void getUserByName_ShouldReturnNull_WhenNameNotExists() {
+        String name = "Unknown";
+        when(userMapper.getUserByName(name)).thenReturn(null);
+
+        User result = userService.getUserByName(name);
+
+        assertNull(result);
+        verify(userMapper, times(1)).getUserByName(name);
+    }
+}
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