Java 访问Mockito/Powermock中的匿名可运行实例

这是我的测试代码：

Activity activityMock = Mockito.mock(TestActivity.class);    

doAnswer(new Answer() {
     @Override
     public Object answer(InvocationOnMock invocationOnMock) throws Throwable {
     Object[] args = invocationOnMock.getArguments(); // ->>>> args contains one Foo instance called "foo"
     return invocationOnMock;
  }
}).when(activityMock).runOnUiThread(any(Runnable.class));

runDialogOnUiThread(activityMock, new Foo());

到以下生产代码：

public static void runDialogOnUIThread(final Activity activity, final Foo foo) {
    activity.runOnUiThread(new Runnable() {
        @Override public void run() {
            doSmth();
        }
    });
}

请参阅测试代码中的注释。我希望invocationMock.getArguments（）返回可运行实例，但它返回的是Foo实例（这对我来说毫无意义）

我想

doAnswer(new Answer(){..}).when(b).bMethod(any(C.class)) 

在b上的任意位置调用bMethod（）时进行拦截，它将C.class的实例传递给doAnswer（），使其在“new Answer（）…”回调中可用

---

如何访问在生产代码中创建的匿名可运行实例？

我猜您的匿名可运行实例是在

Foo

中定义的，对吗

以下是我为再现您的问题而编写的一些代码：

public class MockitoTest {

    @Test
    public void test() {
        final Activity activityMock = Mockito.mock(TestActivity.class);

        doAnswer(new Answer() {
             @Override
             public Object answer(final InvocationOnMock invocationOnMock) throws Throwable {
                 final Object[] args = invocationOnMock.getArguments();
                 System.out.println("Is argument a Runnable? " + (args[0] instanceof Runnable));
                 System.out.println("What is the argument toString()? " + args[0].toString());
                 return invocationOnMock;
             }
        }).when(activityMock).runOnUiThread(any(Runnable.class));

        runDialogOnUIThread(activityMock);
    }


    public void runDialogOnUIThread(final Activity activity) {
        final Runnable r = new Runnable() {
            @Override public void run() {
                System.out.println("***");
            }};
        activity.runOnUiThread(r);
    }

    public static interface Activity {
        void runOnUiThread(Runnable r);
    }

    public static class TestActivity implements Activity {
        @Override
        public void runOnUiThread(final Runnable r) { r.run(); }
    }

}

基本上是一样的，但为了说明我认为你在哪里感到困惑，我们对它进行了删减

输出为：

Is argument a Runnable? true
What is the argument toString()? stackoverflow.MockitoTest$2@6b143ee9

Is argument a Runnable? true
What is the argument toString()? ANON RUNNABLE

请注意，第二个输出包含

toString（）

输出的

MockitoTest

，没有任何关于它是

Runnable

的内容。这是因为在匿名

Runnable

中没有明确定义

toString（）

方法

我们将

Runnable

更改如下：

    final Runnable r = new Runnable() {
        @Override public void run() {
            System.out.println("***");
        }

        @Override public String toString() {
            return "ANON RUNNABLE";
        }
    };

那么输出是：

Is argument a Runnable? true
What is the argument toString()? stackoverflow.MockitoTest$2@6b143ee9

Is argument a Runnable? true
What is the argument toString()? ANON RUNNABLE

我怀疑您被绊倒的地方是，toString（）输出看起来与创建匿名

Runnable

的类同名