Mockito allow mocked return value to be set

Question

Is it possible to change the value that is returned from a mocked object?

Below is an example that explains what I am trying to do.

public class MyClass{
  public void method(Mock obj){
    if(obj.getValue.equals("value"){
      obj.setValue("changedValue");
    }

    anotherObj.call(obj.getValue());
  }

So the above class is very simplified. It will change the value returned if the value passed in equals value.

@Test
public void test(){
  Mock obj = mock(Mock.class);
  when(obj.getValue()).thenReturn("value");

  testClass.method(obj);

  verify(anotherObj, times(1)).call("changedValue");
}

The test want to verify that the anotherObj.call is called with the changed value, but since we have mocked the return value to be 'value' this will fail as 'value' is returned.

Is it possible to create a test using a mocked returnValue?

Answer 1

Johnatan is right. If obj is not a complex object, you can avoid mocking it and use a real one.

If for some reason this is not possible, mockito allows to define a series of answers, eg: when(obj.getValue()).thenReturn("value").thenReturn("modifiedValue"); which could be what you are looking for.

Although it might be overkill, just to make sure that all was ok, I would also verify(obj).setValue("changedValue"); and verify(obj, times(2)).getValue();