java when() 需要一个参数，该参数必须是“对模拟的方法调用”
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/35840428/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
when() requires an argument which has to be 'a method call on a mock'
提问by Jibran Shaikh
I am writing JUnit Test cases for my Controller class in Spring.In that I am getting a MissingMethodInvocationException saying when() requires an argument which has to be 'a method call on a mock' while invoking mocked object of WebTarget in when().then method.
我正在 Spring.In 中为我的 Controller 类编写 JUnit 测试用例，因为我收到一个 MissingMethodInvocationException 说 when() 需要一个参数，该参数必须是“模拟上的方法调用”，同时在 when() 中调用 WebTarget 的模拟对象。然后方法。
Here's the code.
这是代码。
@Controller
public class JobController {
WebTarget target = null;
ClientConfig config = new ClientConfig();
Client client = ClientBuilder.newClient(config);`
List<ScheduleJob> scheduleJobsList = new ArrayList<ScheduleJob>();
@RequestMapping(value = "displayScheduledJobs")
public ModelAndView displayScheduledJobs(@ModelAttribute(value = "Server") Server server) throws JAXBException {
List<Server> serverList = serverService.getJobServerList(user.getAccountId());
target = client.target(getBaseURI(server));
String xml = target.path("rest").path("getScheduledJobs").request().accept(MediaType.APPLICATION_XML).get(String.class);
if (xml.contains("<scheduleJob>") && xml.contains("</scheduleJob>")){
//some code
}
model.addObject("scheduleJobsList", scheduleJobsList);
return model;
}
private static URI getBaseURI(Server server) {
if(server.getSecureFlag().equalsIgnoreCase("N")){
return UriBuilder.fromUri("http://"+server.getServerIp()+":"+server.getServerPort()+"/jobserver").build();
} else {
return UriBuilder.fromUri("https://"+server.getServerIp()+":"+server.getServerPort()+"/jobserver").build();
}
}
}
Here's my Test Code.
这是我的测试代码。
@RunWith(MockitoJUnitRunner.class)
public class JobControllerTest {
@Mock
private WebTarget target;
@Mock
private ClientConfig config;
@Mock
private Client client;
@Test
public void testdisplayScheduledJobs() throws JAXBException {
List<Server> serverList = new ArrayList<Server>();
Server server = new Server();
server.setSecureFlag("N");
serverList.add(server);
config = new ClientConfig();
client = ClientBuilder.newClient(config);
String xml = "<scheduledJobs>" + "</scheduledJobs>";
when(serverService.getJobServerList(user.getAccountId())).thenReturn(serverList);
when(client.target(getBaseURI(server))).thenReturn(target);
when(target.path("rest")).thenReturn(target); //here the error is getting generated
when(target.path("getScheduledJobs")).thenReturn(target);
when(target.request()).thenReturn(builder);
when(builder.accept(MediaType.APPLICATION_XML)).thenReturn(builder);
when(builder.get(String.class)).thenReturn(xml);
model = jobController.displayScheduledJobs(server, request);
assertEquals("displayScheduledJobs", model.getViewName());
}
}
Please suggest a way out for this
请为此提出一个出路
org.mockito.exceptions.misusing.MissingMethodInvocationException:
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
2. inside when() you don't call method on mock but on some other object.
at com.techm.job.administration.console.controller.JobControllerTest.testdisplayScheduledJobs(JobControllerTest.java:309)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.accessclient = ClientBuilder.newClient(config);
0(ParentRunner.java:42)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)
at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
回答by user2004685
You are getting the error because of the following line in your code:
由于代码中的以下行，您收到错误消息：
public class Foo {
@Mock
private JerseyWebTarget target;
@Mock
private Builder requestBuilder;
@Mock
private Response serviceResponse;
@InjectMocks
private Foo foo = new Foo();
@Rule
public ExpectedException thrown = ExpectedException.none();
@Before
public void init() {
MockitoAnnotations.initMocks(this);
Mockito.when(target.queryParam(Matchers.anyString(), Matchers.anyString()))
.thenReturn(target);
Mockito.when(target.queryParam(Matchers.anyString(), Matchers.anyString()))
.thenReturn(target);
Mockito.when(target.queryParam(Matchers.anyString(), Matchers.anyString()))
.thenReturn(target);
Mockito.when(target.queryParam(Matchers.anyString(), Matchers.anyString()))
.thenReturn(target);
Mockito.when(target.request(MediaType.APPLICATION_JSON_TYPE)).thenReturn(
requestBuilder);
}
@Test
public void testGetData() {
List<String> responseList = new ArrayList<>();
responseList.add("foobar");
Mockito.when(requestBuilder.get(Matchers.eq(Response.class))).thenReturn(serviceResponse);
Mockito.when(serviceResponse.getStatus()).thenReturn(200);
Mockito.when(serviceResponse.readEntity(Matchers.any(GenericType.class))).thenReturn(
responseList);
List<String> resultList = foo.getData("foo", "bar");
Mockito.verify(requestBuilder, Mockito.times(1)).get(Matchers.eq(Response.class));
Mockito.verify(serviceResponse, Mockito.times(1)).getStatus();
Mockito.verify(serviceResponse, Mockito.times(1)).readEntity(
Matchers.any(GenericType.class));
assertNotNull(resultList);
assertEquals(1, resultList.size());
assertEquals("true", resultList.get(0).getConfigSetValue());
}
}
When you write this statement, it replaces the mock object of client which you have created above with the new Client and hence clientwill no longer be recognized as a mock by Mockito.
当您编写此语句时，它将用新客户端替换您在上面创建的客户端的模拟对象，因此client将不再被 Mockito 识别为模拟。
Also, I hope you are creating the mock of builderas you are doing when(builder.accept(MediaType.APPLICATION_XML)).thenReturn(builder);.
另外，我希望你创建的模拟builder，你正在做的when(builder.accept(MediaType.APPLICATION_XML)).thenReturn(builder);。
In addition, I can't see any @InjectMocksstatements. You'll have to create an object of the class you are testing and annotate it with @InjectMocksannotation.
另外，我看不到任何@InjectMocks陈述。您必须创建您正在测试的类的对象并使用注释对其进行@InjectMocks注释。
Also, you'll have to initialize your mocks by doing MockitoAnnotations.initMocks(this);in your testdisplayScheduledJobs()method.
此外，您必须通过MockitoAnnotations.initMocks(this);在您的testdisplayScheduledJobs()方法中执行来初始化您的模拟。
Here is a sample code snippet which will give you more insights:
这是一个示例代码片段，它将为您提供更多见解：
##代码##