@Test
public void testCreateScreen() throws Exception {

	assertEquals(0, getScreens().size());
	screenService.createScreen(new Screen("s1", playlist));
	List<Screen> screens = getScreens();
	assertEquals(1, screens.size());
	assertEquals("s1", screens.get(0).getName());
	assertNotNull(screens.get(0).getPlaylist());
	assertEquals(1, screens.get(0).getOwners().size());
	assertEquals(simpleUser.getUserId(), screens.get(0).getOwners().get(0).getUser().getUserId());
	screenService.createScreen(new Screen("s2", playlist));
	assertEquals(2, getScreens().size());
}