Java 莫基托：“我不知道；参数匹配器的使用无效&引用；，然而，我已经一直在使用匹配器

我有两个模拟的测试。我用一些

when

调用准备第一个mock，然后用

when

调用准备第二个mock，该调用将返回第一个mock

然而，在我准备第二个模拟的那一行，我得到了一个

InvalidUseOfMatchersException

。Mockito似乎不喜欢使用

any（HttpRequest.class）

。我在其他项目中多次使用这种方法，没有任何问题。原因是什么

我考虑过的这个错误的一些可能原因包括

• 这个项目使用Java6。mockito core的

  版本是1.8.5

• getResponse

  方法仅在

  SimpleHttpResponseProvider

  的超类中定义
• 超类中的

  getResponse

  标记为

  final

  。如果Mockito使用反射，我不确定这是否会给它带来问题编辑：是的，这就是问题所在。

• getResponse

  方法是

  synchronized

  。但是，删除

  synchronized

  关键字并重试会导致相同的失败

  public class Team5MockHttpServerTest {
  
      private HttpResponse httpResponse;
      private SimpleHttpResponseProvider simpleHttpResponseProvider;
  
      @Test
      public void whenAllBehaviorIsNominalThenExpectationsAreMet() throws IOException {
  
          int expectedStatusCode = 200;
          String contentType = "application/json";
          String body = "{\"message\":\"Hello world\"}";
  
          this.httpResponse = mock(HttpResponse.class);
          when(this.httpResponse.getHttpCode()).thenReturn(expectedStatusCode);
          when(this.httpResponse.getContentType()).thenReturn(contentType);
          when(this.httpResponse.getContent()).thenReturn(body.getBytes());
  
          this.simpleHttpResponseProvider = mock(SimpleHttpResponseProvider.class);
          when(this.simpleHttpResponseProvider.getResponse(any(HttpRequest.class))) // Exception here
              .thenReturn(this.httpResponse);
      }
  }
  

错误：

Running com.github.kristofa.test.http.Team5MockHttpServerTest
Tests run: 2, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 0.05 sec <<< FAILURE!
whenAllBehaviorIsNominalThenExpectationsAreMet(com.github.kristofa.test.http.Team5MockHttpServerTest)  Time elapsed: 0.048 sec  <<< ERROR!
org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Invalid use of argument matchers!
0 matchers expected, 1 recorded.
This exception may occur if matchers are combined with raw values:
    //incorrect:
    someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
    //correct:
    someMethod(anyObject(), eq("String by matcher"));
For more info see javadoc for Matchers class.
    at com.github.kristofa.test.http.AbstractHttpResponseProvider.getResponse(AbstractHttpResponseProvider.java:77)
    at com.github.kristofa.test.http.Team5MockHttpServerTest.whenAllBehaviorIsNominalThenExpectationsAreMet(Team5MockHttpServerTest.java:60)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
whenAllBehaviorIsNominalThenExpectationsAreMet(com.github.kristofa.test.http.Team5MockHttpServerTest)  Time elapsed: 0.049 sec  <<< ERROR!
java.lang.NullPointerException
    at com.github.kristofa.test.http.Team5MockHttpServerTest.tearDown(Team5MockHttpServerTest.java:44)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:36)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)

运行com.github.kristofa.test.http.Team5MockHttpServerTest
测试运行：2，失败：0，错误：2，跳过：0，经过的时间：0.05秒问题与匹配器无关。这是因为我试图模拟的方法在超类中被定义为
final
。删除
final
关键字后，错误消失。
当（this.simpleHttpResponseProvider.getResponse（any（））。然后返回（this.httpResponse）时，是否尝试删除“HttpRequest.class”；你能再检查一下你要导入的
匹配器吗？有时，有两个相互冲突的库提供
任何
匹配器。确保你使用的是来自Mockito@yashsugandh：是的，我试过了。除非我强制转换
any（）
，如
（HttpRequest）any（）
，否则它无法编译。如果我这样做，我会得到相同的
InvalidUseOfMatchersException
@stefanzhelayazkov:any
导入的
any
是来自
org.mockito.Matchers.any
的静态导入。