def test_cache_safe_truncate(self):
key1 = 'a' * 4096
key2 = 'a' * 4096 + 'b'
new_key1 = Memcached.safe_truncate(key1)
new_key2 = Memcached.safe_truncate(key2)
assert len(new_key1) < 250
assert len(new_key2) < 250
assert new_key1 != new_key2
