Spring Boot 测试中使用 Mockito 验证方法调用次数

Question

Spring Boot 测试中使用 Mockito 验证方法调用次数

javaspring-bootjunitmockito

3

我想验证一个被模拟的方法 (fileSenderService.sendFile) 被调用了恰好2次。但无论期望的调用次数是多少，Mockito 都没有引发测试失败。我是这样使用它的:

verify(mockService, times(expectedNumberOfInvocations)).sendFile(any(String.class), any(byte[].class));

无论在 times() 方法中使用什么值，测试总是通过。

MyService 的代码看起来像这样:

@Service
public class MyServiceImpl implements MyService {

    @Autowired
    private FileSenderService fileSenderService;

    public void createAndSendFiles(){
        //doSomeStuff, prepare fileNames and fileContents(byte arrays)
        //execute the sendFile twice
        fileSenderService.sendFile(aFileName, aByteArray); //void method; mocked for testing
        fileSenderService.sendFile(bFileName, bByteArray); //void method; mocked for testing
    }

测试类

@RunWith(SpringRunner.class)
@WebAppConfiguration
@SpringBootTest(classes = {Application.class, FileSenderServiceMock.class})
@ContextConfiguration
public class MyServiceTest{

    @Autowired
    private MyService myService;

    @Autowired
    FileSenderService mock;

    @Test
    public void shouldCreateAndSendFiles(){
        myService.createAndSendFiles(); //inside this method sendFile() is called twice
        verify(mock, times(999)).sendFile(any(String.class), any(byte[].class)); //THE PROBLEM - why times(999) does not fail the test?
    }
}

文件发送服务及其模拟：

@Service
public class FileSenderServiceImpl implements FileSenderService {
   @Override
    public void sendFile(String name, byte [] content) {
      //send the file
    }
}

//used for testing instead of the actual FileSenderServiceImpl 
public class FileSenderServiceMock {
    @Bean
    @Primary
    public FileSenderService getFileSenderServiceMock(){
        FileSenderServicemock = Mockito.mock(FileSenderService.class, Mockito.RETURNS_DEEP_STUBS);

        doNothing().when(mock).sendFile(isA(String.class), isA(byte[].class));
        return mock;
    }

- Domin0

如果您正在测试MyService，不应该使用Autowire注入FileSenderService，而应该使用@Mock注解进行模拟。在测试代码中，在调用myService.createAndSendFiles()之前添加“doNothing()…”行。 - ruba

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- Ryuzaki L · Answer 1

如果您在使用@SpringBootTest进行集成测试时，无需为模拟定义任何测试配置类，只需使用@MockBean注释将模拟注入到测试上下文中即可。

@RunWith(SpringRunner.class)
@SpringBootTest
public class MyServiceTest{

    @Autowired
    private MyService myService;

    @MockBean
    FileSenderService fileSenderService;

    @Test
    public void shouldCreateAndSendFiles(){
    myService.createAndSendFiles(); 
    verify(fileSenderService, times(2)).sendFile(any(String.class), any(byte[].class));
   }
}