模拟Singleton Public/Void方法失败

Question

场景如下:

public class classA implements classRandom {
   public void methodA(arg1, arg2) {
       POJOb objB;
       objB = SingletonClass_Instance().singletonMethodA(arg1);
   }
   public SingletonClass SingletonClass_Instance() {
       return SingletonClass.getInstance();
   }
}
public class SingletonClass {
    public objB singletonMethodA(final String arg1) {
        return randomObj;
    }
}

我正在为a类中的methodA编写单元测试。为此，我编写了以下存根代码:

SingletonClass mockSingletonClass = PowerMockito.mock(SingletonClass.class);
POJOb = PowerMockito.mock(POJOb.class);
Mockito.when(mockSingletonClass.singletonMethodA(Mockito.anyString())).thenReturn(POJOb);

在这段代码之后，我有一个代码:

POJOb objB = classA_Object.methodA(arg1, arg2);

这段代码一旦到达:

就会失败

**methodA -->  SingletonClass_Instance().singletonMethodA**

我已经使用了下面的powermockit过程:

1) import PM libs
2) Added @PrepareForTest({SingletonClass.class, POJOb.class})

我仍然无法模拟SingletonClass的Public/Void方法。结果总是为零。

Answer 1

您需要做这样的事情。

PowerMockito.mockStatic(SingletonClass.class);
SingletonClass mockSingleton = PowerMockito.mock(SingletonClass.class);
PowerMockito.when(SingletonClass.getInstance()).thenReturn(mockSingleton);