Mockito: How to match any enum parameter

Apart from the above solution try this...

when(object.doThings((MyEnum)anyObject(), anyLong()).thenReturn(123L);

Matchers.any(Class) will do the trick:

Mockito.when(object.doThings(Matchers.any(MyEnum.class), Matchers.anyLong()))
    .thenReturn(123L);

null will be excluded with Matchers.any(Class). If you want to include null you must use the more generic Matchers.any().

As a side note: consider using Mockito static imports:

import static org.mockito.Matchers.*;
import static org.mockito.Mockito.*;

Mocking gets a lot shorter:

when(object.doThings(any(MyEnum.class), anyLong())).thenReturn(123L);

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