A friend (learning node development) just asked:
Hey, another developer is encouraging me to do some unit testing using a testing framework called Mocha and Chai. What are your thoughts: must do, nice to have, or good hygiene (like pushing to GitHub and production every day)? Thanks in advance for your advice!
My answer: Must do, but it’s Level 2. In other words, as soon as you’ve grasped the basics (shipped your first app or site) – you should learn to write tests.
- Istanbul (coverage)
Longer answer: Automated testing is often required to know that your code is working. Once you’ve got a good suite of tests, you can change things with confidence and quickly verify that you haven’t broken something unexpectedly. However, It won’t guarantee that your code has no bugs (after all, tests can contain bugs too). Lastly, writing tests first (AKA “test driven development”) will help you organize your code better and write better interfaces.