Question

I have concrete class that I want to mock. There are several annotated methods with annotations. I want to create class mock but I need to preserve that annotations.

I tried easymock. It subclasses my class without problems, but does not preserve annotations.

I would like to preserve annotations in easymock. If that is impossible are there any other mocking solution?

Answer 1

I prefer mockito which uses a different paradigm for mocking out classes. You don’t have to subclass everything like you do with easymock.

http://code.google.com/p/mockito/

The javadoc itself has a ton of information about how to utilize the library

http://docs.mockito.googlecode.com/hg/latest/org/mockito/Mockito.html#2

Her is a short example from their documentation.

//You can mock concrete classes, not only interfaces
LinkedList mockedList = mock(LinkedList.class);

//stubbing
when(mockedList.get(0)).thenReturn("first");
when(mockedList.get(1)).thenThrow(new RuntimeException());

//following prints "first"
System.out.println(mockedList.get(0));

//following throws runtime exception
System.out.println(mockedList.get(1));

//following prints "null" because get(999) was not stubbed
System.out.println(mockedList.get(999));

//Although it is possible to verify a stubbed invocation, 
//usually it's just redundant
//If your code cares what get(0) returns then something else 
//breaks (often before even verify() gets executed).
//If your code doesn't care what get(0) returns then it should 
not be stubbed. Not    convinced? See here.
verify(mockedList).get(0);

So with this library you setup your tests and stub out the methods that you are interested in testing.

Hope you found this useful.