/en/categories/javascript/ Recent content in Javascript on Hugo Bootstrap Hugo -- gohugo.io en-us Copyright © 2016-{year} Razon Yang. All Rights Reserved. Sat, 21 Aug 2021 09:00:00 +0000 /en/posts/2021-08-25-spying-on-methods-jest/ Sat, 21 Aug 2021 09:00:00 +0000 /en/posts/2021-08-25-spying-on-methods-jest/ How mocks make it easy to ensure your application logic It’s easy to test your application when your domain layer is decoupled from other: For example, let’s imagine the following scenario: In a Race Game, when the Car hit an obstacle, the player will go back a couple of yards, and the barrier will be removed The Pseudo-code We have a Game class that receives the Player and the ObstacleManager: