java - Mockito: "Invalid use of argument matchers!"，但我已经一直在使用匹配器

Question

我有一个带有 2 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，它将返回第一个 mock。

但是，我在准备第二个模拟的行中收到了 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，没有问题。这是什么原因？

我考虑过的导致此错误的一些可能原因包括

• 该项目使用 Java 6。mockito-core 版本为 1.8.5。
• getResponse 方法仅在 SimpleHttpResponseProvider 的父类(super class)中定义。
• getResponse 在父类(super class)中被标记为 final。如果使用反射，我不确定这会给 Mockito 带来问题。 编辑:是的，这就是问题所在。

• getResponse 方法是同步的。但是，删除 synchronized 关键字并重试会导致同样的失败。

  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)

Answer 1

问题与匹配器无关。这是因为我试图模拟的方法在父类(super class)中被定义为 final。删除 final 关键字后，错误消失。