def test_delete_updates_length(self):
"""
Updates the correct length of the cache
"""
cache = LRUCache(10)
cache.add_value(1)
before_delete = cache.length()
cache.delete_value(1)
after_delete = cache.length()
self.assertEqual(before_delete, 1)
self.assertEqual(after_delete, 0)
def test_length_returns_0(self):
"""
Returns 0 if no values have been added
"""
cache = LRUCache(10)
result = cache.length()
self.assertEqual(result, 0)
def test_returns_correct_length(self):
"""
Returns the correct length of the cache if
values have been added
"""
cache = LRUCache(1234)
cache.add_value("1")
cache.add_value("2")
cache.add_value("3")
result = cache.length()
self.assertEqual(result, 3)
