@Test (expected = PoolItemNotAvailableException.class) // timeout expire public void testSessionWaitExpire() throws Exception { SessionFactory sessionFactory = Mockito.mock(SessionFactory.class); Session session = Mockito.mock(Session.class); Mockito.when(sessionFactory.getSession()).thenReturn(session); CachingSessionFactory cachingFactory = new CachingSessionFactory(sessionFactory, 2); cachingFactory.setSessionWaitTimeout(3000); cachingFactory.getSession(); cachingFactory.getSession(); cachingFactory.getSession(); }