我正在为 Spring Boot 应用程序创建一些单元测试。
在名为 ComicService 的类中,有一个名为 getComicByApi 的方法,我想为该方法创建一个测试,但此方法访问同一类的另一个方法,称为getHash。
我需要配置 getHash 的行为,因此我在创建 ComicService 对象时使用了 @SpyBean 注释。
问题是,运行测试时,在我使用 Mockito.when().thenReturn() 配置 getHash 行为的部分出现错误。
我发现该错误与我使用 @BeforeEach public void setUp() 使用 @SpyBean 传递其构造函数参数来实例化带注释的类有关,但我仍然不知道怎么解决。
有人知道如何解决这个问题吗?
漫画服务
@Service
public class ComicService {
private String publicKey;
private String privateKey;
private MarvelClient marvelClient;
public ComicService(@Value("${marvel.public_key}")String publicKey,
@Value("${marvel.private_key}") String privateKey, MarvelClient marvelClient) {
this.publicKey = publicKey;
this.privateKey = privateKey;
this.marvelClient = marvelClient;
}
public MarvelAPIModelDTO getComicByApi(Integer idComicMarvel) {
String timeStamp = String.valueOf((int)(System.currentTimeMillis() / 1000));
String hash = getHash(timeStamp);
MarvelAPIModelDTO comic = marvelClient.getComic(idComicMarvel, timeStamp, timeStamp, hash);
return comic;
}
public String getHash(String timeStemp) {
String value = timeStemp+privateKey+publicKey;
MessageDigest md;
try {
md = MessageDigest.getInstance("MD5");
} catch(NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
BigInteger hash = new BigInteger(1, md.digest(value.getBytes()));
return hash.toString(16);
}
}
ComicService测试
@ExtendWith(SpringExtension.class)
@ActiveProfiles("test")
public class ComicServiceTest {
@SpyBean
ComicService comicService;
@MockBean
MarvelClient marvelClient;
@BeforeEach
public void setUp() {
this.comicService = new ComicService("ae78641e8976ffdf3fd4b71254a3b9bf", "eb9fd0d8r8745cd0d554fb2c0e7896dab3bb745", marvelClient);
}
@Test
public void getComicByApiTest() {
// Scenario
MarvelAPIModelDTO foundMarvelAPIModelDTO = createMarvelAPIModelDTO();
//It's giving an error on this line
Mockito.when(comicService.getHash(Mockito.anyString())).thenReturn("c6fc42667498ea8081a22f4570b42d03");
Mockito.when(marvelClient.getComic(Mockito.anyInt(), Mockito.anyString(), Mockito.anyString(), Mockito.anyString())).thenReturn(foundMarvelAPIModelDTO);
// Execution
MarvelAPIModelDTO marvelAPIModelDTO = comicService.getComicByApi(1);
// Verification
Assertions.assertThat(marvelAPIModelDTO.getData().getResults().get(0).getId()).isEqualTo(1);
}
}
错误
at com.gustavo.comicreviewapi.services.ComicServiceTest.getComicByApiTest(ComicServiceTest.java:58)
You cannot use argument matchers outside of verification or stubbing.
Examples of correct usage of argument matchers:
when(mock.get(anyInt())).thenReturn(null);
doThrow(new RuntimeException()).when(mock).someVoidMethod(any());
verify(mock).someMethod(contains("foo"))
This message may appear after an NullPointerException if the last matcher is returning an object
like any() but the stubbed method signature expect a primitive argument, in this case,
use primitive alternatives.
when(mock.get(any())); // bad use, will raise NPE
when(mock.get(anyInt())); // correct usage use
Also, this error might show up because you use argument matchers with methods that cannot be mocked.
Following methods *cannot* be stubbed/verified: final/private/equals()/hashCode().
Mocking methods declared on non-public parent classes is not supported.
最佳答案
看起来@SpyBean
无法找到您的服务类的实例。快速替代方法是从 ComicService ComicService;
中删除 @SpyBean
并在 @BeforeEach
中执行以下操作:
@BeforeEach
public void setUp() {
this.comicService = Mockito.spy(new ComicService("ae78641e8976ffdf3fd4b71254a3b9bf", "eb9fd0d8r8745cd0d554fb2c0e7896dab3bb745", marvelClient));
}
在这里,您正在创建 spy ,然后在测试类中使用它。
关于java - 如何在通过构造函数接收参数的类中使用@SpyBean?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/72828384/