def test_overflow_after_clear():
lru = LruCache(1)
lru.clear()
lru.set('a', 10)
lru.set('b', 20)
assert lru.get('c') == SENTINEL
def test_lru_object():
lru = LruCache(3)
lru.set('a', 10)
lru.set('b', 20)
lru.set('c', 30)
assert 10 == lru.get('a')
lru.set('d', 40)
assert SENTINEL is lru.get('b')
assert 30 == lru.get('c')
lru.delete('c')
assert 10 == lru.get('a')
assert SENTINEL is lru.get('b')
assert SENTINEL is lru.get('c')
assert 40 == lru.get('d')
lru.clear()
for c in 'abcd':
assert SENTINEL is lru.get(c)
lru.cache_info()