[英]How mock a class with a custom annotation using Mockito?
我正在為CatalogFacade類編寫單元測試; 該類是這樣的:
public class CatalogFacade{
@Inject
@Shallow //custom annotation
private ITServiceMapper servMapper;
@Inject
@Complete //custom annotation
private ITServiceMapper dServMapper;
@Override
public ITService getITService(String serviceCode) {
ITService a = dServMapper.method();
return a;
}
}
並且我以這種方式編寫了單元測試:
@RunWith(MockitoJUnitRunner.class)
public class CatalogFacadeTest {
@InjectMocks
private CatalogFacade facade;
@Mock
private ITServiceMapper servMapperMock;
@Mock
private ITServiceMapper dServMapperMock;
@Test
public void getITService() {
/* prepare value objects */
ITService dtoMock= Mockito.mock(ITService.class);
/* Given some preconditions (Arrange) */
given(dServMapperMock.modelToDto(entityMock)).willReturn(dtoMock);
/* When an action occurs (Act) */
ITService service= facade.getITService("AMS-SA-0001");
/* Then verify the output (Assert) */
assertThat(dtoMock.getItServiceCode(),
is(equalTo(service.getItServiceCode())));
}
}
但是測試拋出NullPointeException,因為調用dServMapperMock.method()時,dservMapperMock為null,所以我認為它沒有被正確模擬...
我認為問題可能出在ITServiceMapper類具有自定義批注的地方,我無法模擬它。
我如何嘲笑這堂課?
謝謝!
這不起作用的主要原因是,您的類(CatalogFacade)中有多個ITServiceMapper
實例。
在這些情況下,Mockito(特別是@InjectMocks)存在一些問題。 解決此問題的最簡單方法是通過協助Mockito像這樣的name屬性
@Mock(name = "servMapper")
private ITServiceMapper servMapper;
@Mock(name = "dServMapper")
private ITServiceMapper dServMapperMock;
這是構造函數注入總是比字段注入更好的原因之一。 檢查此文章了解更多信息
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