如何使用 JUnit 和 Mockito 通过静态 util 调用测试 Rest Controller

Question

我有带有方法 create(validation using util class + databaseService(databaseDao + caching ))

@RestController
@RequestMapping("files")
public class FilesController {
    private IDbFilesDao dbFilesService;
    private Map<String, Table> tables;

    public FilesController(IDbFilesDao dbFilesService, Map<String, Table> tables) {
        this.dbFilesService = dbFilesService;
        this.tables = tables;
    }

    @PostMapping("{table}")
    public ResponseEntity createTable(@PathVariable("table") String tableName,
                                         @RequestBody File file) {
        FilesValidator.validateAdding(tableName, tables, file);

        dbFilesService.create(tableName, file);

        URI location = ServletUriComponentsBuilder.fromCurrentRequest().buildAndExpand(file.getKey()).toUri();
        return ResponseEntity.created(location).build();
    }
}

我有一个测试：

@RunWith(SpringRunner.class)
@WebMvcTest(value = FilesController.class, secure = false)
public class FilesControllerTest {
    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private IDbFilesDao dbFilesService;

    @MockBean
    private Map<String, Table> tables;

    @Test
    public void create() throws Exception {
        RequestBuilder requestBuilder = MockMvcRequestBuilders
                .post("/files/tableName")
                .accept(MediaType.APPLICATION_JSON)
                .content(POST_JSON_BODY)
                .contentType(MediaType.APPLICATION_JSON);
        MvcResult result = mockMvc.perform(requestBuilder).andReturn();
        MockHttpServletResponse response = result.getResponse();
        assertEquals(HttpStatus.CREATED.value(), response.getStatus());
    }
}

只有在@RestContoller 中没有这一行时它才能正常工作：

FilesValidator.validateAdding(tableName, tables, file);

此行 - 404 未找到。

FilesValidator - 具有静态方法的实用程序类。它检查数据是否有效并且什么都不做或抛出带有状态码的运行时异常（例如 404）。

如何在不删除 Validation 的情况下修复它？

Answer 1

1) 将验证器调用移至包级方法并进行小重构：

@PostMapping("{table}")
    public ResponseEntity createTable(@PathVariable("table") String tableName,
                                         @RequestBody File file) {
        validateAdding(tableName, tables, file);
        ...
}

validateAdding(String tableName, Map<String, Table> tables, File file){
    FilesValidator.validateAdding(tableName, tables, file);
}

2) 在测试中窥探控制器：

@SpyBean
private FilesController filesControllerSpy;

3) 让validateAdding 方法什么都不做：

@Test
public void create() throws Exception {

   doNothing().when(filesControllerSpy)
     .validateAdding(any(String.class), any(Map.class), any(File.class));
   ...