java - Mockito 验证无法正常工作

Question

我对 Mockito 还很陌生，尽管我之前已经成功运行过测试，但今天看起来很奇怪，为什么 mockito verify() 方法不断告诉我需要 View 方法，但没有调用，即使我确信 Presenter 方法正确调用了它。这是我的测试代码:

 @Test
public void loadCallPlans_shouldUpdateAdapter() {
    ArrayResponse<CallPlan> callPlans = new ArrayResponse<>();
    callPlans.data = Arrays.asList(new CallPlan[]{new CallPlan(), new CallPlan()});
    Single response = Single.just(callPlans);

    when(callPlanRepository.getCallPlans()).thenReturn(response);

    presenter.loadCallPlans("Today");

    doAnswer((Answer<Void>) invocation -> {
        Object[] args = invocation.getArguments();
        System.out.println("View.updateCallPlans() called with arguments: " + java.util.Arrays.toString(args));
        return null;
    }).when(view).updateCallPlans(anyList());

    verify(view).updateCallPlans(anyList());

}

我可以确认调用了 updateCallPlans() 方法，因为我在 logcat 中使用参数 [[]] 调用了 View.updateCallPlans()。我的完整日志:

View.updateCallPlans() called with arguments: [[]]


Wanted but not invoked:
view.updateCallPlans(<any List>);
-> at    CallPlansPresenterTest.loadCallPlans_should    UpdateAdapter(CallPlansPresenterTest.java:69)
Actually, there were zero interactions with this mock.

Wanted but not invoked:
view.updateCallPlans(<any List>);
-> at     CallPlansPresenterTest.loadCallPlans_should    UpdateAdapter(CallPlansPresenterTest.java:69)
Actually, there were zero interactions with this mock.

at CallPlansPresenterTest.loadCallPlans_shouldUpdateAdapter(CallPlansPresenterTest.java:69)
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.internal.runners.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:326)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:298)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:218)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:160)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:134)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:136)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:121)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
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 com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)

如果我让 RxJava 返回错误作为响应，测试运行正常并且 View.setError() 得到正确验证:

 @Test
 public void loadCallPlans_shouldShowError() {
    String error = "Error";
    Single response = Single.error(new Throwable(error));

    when(callPlanRepository.getCallPlans()).thenReturn(response);

    presenter.loadCallPlans("Today");

    doAnswer((Answer<Void>) invocation -> {
        Object[] args = invocation.getArguments();
        System.out.println("View.setError() called with arguments: " + java.util.Arrays.toString(args));
        return null;
    }).when(view).setError(anyString());

    verify(view).setError(error);

}

Answer 1

您实际上是在模拟对 updateCallPlans 的调用

doAnswer((Answer<Void>) invocation -> {
        Object[] args = invocation.getArguments();
        System.out.println("View.updateCallPlans() called with arguments: " + java.util.Arrays.toString(args));
        return null;
    }).when(view).updateCallPlans(anyList());
}

所以它永远不会调用实际的方法。

您的验证应该在答案调用内。