Spring测试异常：单独运行通过但Maven构建时测试被跳过

单独运行ResourceControllerTests测试类时所有用例均可通过，但执行mvn test命令构建项目时，测试用例被跳过，出现如下错误日志：

2023-05-03T08:10:06.508+01:00  INFO 57176 --- [           main] t.c.s.AnnotationConfigContextLoaderUtils : Could not detect default configuration classes for test class [com.schrodingdong.resourcemanager.controller.Tests]: Tests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.

Test ignored.

Test ignored.

Test ignored.

Test ignored.

java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.BasicFileAttributes.lastModifiedTime()" because "this.attrs" is null

相关代码 #

ResourceController类 #

@RestController
@RequestMapping("/resource")
@CrossOrigin
public class ResourceController {
    private final ResourceService resourceService;

    public ResourceController(ResourceService resourceService) {
        this.resourceService = resourceService;
    }

    @PostMapping("/upload")
    public ResponseEntity<?> uploadObject(@RequestParam ("file") MultipartFile multipartFile,
                                          @RequestParam String userMail,
                                          @RequestParam String resourceDescription,
                                          @RequestParam String resourceVisibility) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        // ...
    }

    @GetMapping("/download")
    public ResponseEntity<?> downloadObject(@RequestParam String resourceId,
                                            @RequestParam String userMail,
                                            @RequestParam String downloadName) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        //...
    }

    @NotNull
    private String getExtension(String fileName) {
        // ...
    }


    @DeleteMapping("/delete")
    public ResponseEntity<?> deleteObject(@RequestParam String resourceId,
                             @RequestParam String userMail) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        // ...
    }

}

ResourceControllerTests测试类 #

@WebMvcTest(ResourceController.class)
public class ResourceControllerTests {

    @Autowired
    private MockMvc mockMvc;
    @MockBean
    private ResourceService mockResourceService;
    private ObjectMapper objectMapper;

    @BeforeEach
    void setUp() {
        objectMapper = new ObjectMapper();
    }

    @Test
    void uploadObject() throws Exception {
                // ...
    }

    @Test
    void downloadObject() throws Exception {
                // ...
    }

    @Test
    void deleteObject() throws Exception {
                // ...
    }
}

注：项目中另一控制器类无论单独运行还是通过Maven测试均正常。

• 处理无效测试类Tests：错误日志明确指向com.schrodingdong.resourcemanager.controller.Tests类，该类未正确配置Spring测试上下文。检查该类：

  • 若为误创建的空测试类，直接删除；
  • 若为有效测试类，补充@WebMvcTest或@SpringBootTest等必要注解，确保测试上下文配置正确。

• 修复文件操作NPE：针对空指针异常，检查文件属性相关逻辑：

  • 在生产代码（如uploadObject、downloadObject方法）中，添加BasicFileAttributes的null校验，避免调用lastModifiedTime()时出错；
  • 测试用例中若模拟了文件操作，确保文件属性相关模拟逻辑已正确初始化，避免返回null。

• 清理缓存重新测试：执行mvn clean test，清理Maven缓存和编译产物后重新运行测试，排除缓存导致的异常。

• 校验依赖版本：确保spring-boot-starter-test版本与项目Spring Boot版本一致，避免依赖冲突引发测试上下文加载问题。

内容的提问来源于stack exchange，提问作者AHamza