List<String> mockList = MockObjectFactory.createMock(List.class); Mock.expect(mockList.size()).andReturn(10); Mock.replay(mockList); assertEquals(10, mockList.size()); List<String> mockList = MockObjectFactory.createMock(List.class); mockList.add("test element"); Mock.verify(mockList); List<String> mockList = MockObjectFactory.createMock(List.class); Mock.expect(mockList.size()).andReturn(10); Mock.reset(mockList);