如何使用JUnit和Mockito使用靜態util調用來測試Rest Controller

Question

我有Rest控制器的方法create（ 使用util class + databaseService 驗證 （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();
    }
}

我有一個測試：

@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());
    }
}

它只在@RestContoller中沒有這一行時效果很好：

FilesValidator.validateAdding(tableName, tables, file);

有了這一行 - 找不到404。

FilesValidator - 帶有靜態方法的util類。 它檢查數據是否有效並且什么都不做，或者使用狀態代碼（例如404）拋出運行時異常。

如何在不退出驗證的情況下修復它？

Answer 1

1）將驗證器調用移動到包級別方法並進行小型重構：

@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）在測試中窺探控制器：

@SpyBean
private FilesController filesControllerSpy;

3）使validateAdding方法不執行任何操作：

@Test
public void create() throws Exception {

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