def test_get_item_in_cache_invalid_timestamp(self, mock_valid_timestamp):
cache = Cache(5, 60.0)
cache._items = {"k1": ["v1", 0.1]}
mock_valid_timestamp.return_value = False
self.assertIsNone(cache.get("k1"))
mock_valid_timestamp.assert_called_once_with("k1")
def test_get_item_in_cache_valid_timestamp(self, mock_valid_timestamp):
cache = Cache(5, 60.0)
cache._items = {"k1": ["v1", 0.1]}
mock_valid_timestamp.return_value = True
self.assertEqual(cache.get("k1"), "v1")
mock_valid_timestamp.assert_called_once_with("k1")
def test_get_item_not_in_cache(self):
cache = Cache(5, 60.0)
self.assertIsNone(cache.get("k1"))