@Test public void testEventSessionTime() { Event testEvent = createEvent(); Assert.assertEquals(testEvent.getSessionsSet().size(), 1); eventService.addSessionTime(testEvent, DateTime.now().plusDays(5)); eventService.addSessionTime(testEvent, DateTime.now().plusDays(6)); eventService.addSessionTime(testEvent, DateTime.now().plusDays(7)); Assert.assertEquals(testEvent.getSessionsSet().size(), 4); Assert.assertTrue(testEvent.getSessionsSet().contains(TESTED_DATE)); eventService.removeSessionTime(testEvent, TESTED_DATE); Assert.assertFalse(testEvent.getSessionsSet().contains(TESTED_DATE)); }