public void testGetCachedDays() throws NoSuchFieldException, IllegalAccessException {
Field cachedDaysField = DayManagerImpl.class.getDeclaredField("cachedDays");
cachedDaysField.setAccessible(true);
cachedDaysField.set(dayManager, null);
Assert.assertNull(dayManager.getCachedDays());
List<Day> days = dayManager.getAll();
List<Day> cachedDays = dayManager.getCachedDays();
Assert.assertNotNull(cachedDays);
Assert.assertEquals(days.size(), cachedDays.size());
cachedDaysField.setAccessible(false);
}
