不要在其他类中使用参数的非void方法

Question

public class aClass {
   public String meth1() {
      bClass b = new bClass();
      b.meth2();// I don't want to call this method
      //buss logic
   }
}
public class bClass {
   public String meth2() {
      // some logic
   } 
}

目前，我正在为aClass中的meth1创建一个JUnit测试用例。但是，我不想在bClass中调用meth2，只执行aClass中的总线逻辑。类aClass和bClass是固定的-我不能改变他们的代码。

我尝试了很多东西，如@InjectMocks和doNothing使用Mockito和PowerMock，但meth2总是被调用时，我在aClass调用meth1。我能做些什么来解决这个问题?

Answer 1

PowerMock拯救:

@RunWith(PowerMockRunner.class)
@PrepareForTest({ aClass.class })
public class TestPowerMock {
    @Test
    public void shouldBlaBla() throws Exception {
        // you can do whatever you want on bMock, because it's a mock
        bClass bMock = PowerMockito.mock(bClass.class);
        // when aClass instantiates bClass, the mock will be returned
        PowerMockito.whenNew(bClass.class).withNoArguments().thenReturn(bMock);
        // your test
        aClass a = new aClass();
        a.meth1();
    }
}

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