proxies

I'm having an issue when trying to mock a property of a service from within a Junit test: @ContextConfiguration("classpath:application-config.xml") @RunWith(SpringJUnit4ClassRunner.class) public class FooServiceTests { @Autowired private FooServiceImpl fooService; @Test public void testFoo() { String str = fooService.foo(); assertEquals("Var", str); } @Before public void mockFooDao() throws Exception { FooDao mockFooDao = Mockito.mock(FooDao.class); Mockito.when(mockFooDao.foo()).thenReturn("Var"); ReflectionTestUtils.setField(fooService, "fooDao", mockFooDao); } } Mocking fooDao has no effect

I am using DBContext and have two classes whose properties are all virtual. I can see in the debugger that I am getting a proxy object when I query the context. However, a collection property is still null when I try to add to it. I thought that the proxy would ensure that collection is initialized. Because my Poco object can be used outside of its data context, I added a check for the collection being null in the constructor and create it if necessary: public class DanceStyle { public DanceStyle() { if (DanceEvents == null) { DanceEvents = new Collection<DanceEvent>(); } } ... public virtual