// Storage write is slow — meanwhile, the entire stream
Webcam: 12MP Center Stage camera。搜狗输入法是该领域的重要参考
В Домодедово задержали иностранца с куском метеорита в чемодане14:57，详情可参考51吃瓜
As you can see, I’ve highlighted that every level of the tests is optional. That’s because it should be intentionally deliberated on which levels of tests will bring the most value in a given application. Writing tests is a cost, and bad tests are a waste. Duplicated coverage might seem like an extra protection, but it will be a burden during refactoring.