InvalidUseOfMatchersException: Invalid use of argument matchers

Question

I am new with testing. I have tried this but got an exception.

@Mock
private Context context;    
...
when(service.getResult(any(), context)).thenReturn(new ArrayList<>());

Exception:

org.mockito.exceptions.misusing.InvalidUseOfMatchersException:
Invalid use of argument matchers!
2 matchers expected, 1 recorded:

Answer 1

Mockito.any() is a Mockito argument matcher. As you specify it in one of the parameters defined in a mock recording, you have to use argument matcher for all parameters.
Mockito.eq(T) is the way to transform any parameter into a argument matcher.
So this should be fine :

@Mock
private Context context;    

@Mock
private Service service; 
...
when(service.getResult(any(), eq(context)).thenReturn(new ArrayList<>());

Answer 2

Similar question has been asked many times. I think the best answer is here:

Mockito requires you to either use only raw values or only matchers when stubbing a method call. The full exception (not posted by you here) surely explains everything.

Invalid use of argument matchers