def test_delete_deprecated(self):
cache = Cache()
cache.set_item_lifetime(seconds=1)
for i in range(10):
cache.add(i)
time.sleep(0.5)
deleted = cache.delete_deprecated()
self.assertTrue(len(cache) == 1)
self.assertEqual(deleted, 9)
cache.reset_item_lifetime()
self.assertEqual(cache.item_lifetime, None)
cache.delete_deprecated()
self.assertTrue(len(cache) == 1)
