def test_delete_unpopular(self):
cache = Cache()
for i in range(10):
cache.add(i)
asdf = cache["3"]
sfdg = cache["4"]
srgd = cache.get("3")
jhkh = cache.get("4")
deleted = cache.delete_unpopular(2)
self.assertEqual(deleted, 8)
self.assertTrue(len(cache) == 2)
