Jest - JavaScript testing made easier
Jest
JavaScript testing made easier
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Hunter's comment
Jest - Delightful JavaScript Testing
Jest is a unit testing framework created by Facebook, which gain a lot of popularity in the recent time. I had been using Jest extensively for both front end web (React) and backend Node.js server (Express and Discord).
Jest will look for files that ends with .test.js, and run unit test on these files, therefore it is hassle-free on setting up testing framework code alongside with main source code.
Key features:
- Relatively Fast to start up and running.
- Easy to setup.
- Works like a charm.
- Suitable for new comers that are not familiar with Test Driven Development (TDD), as the setup is quite easy.
- Support running partial test or only run failed test.
- Snapshot testing available for front end to take trees structure. (Support in React and Vue)
- Build in code coverage report from Istabul.
- Support typescript.
- Project is open source on Github!
Drawbacks
- Jest was mostly used by React project, therefore it might be some pain to test other framework due to lack of support.
- maybe a slightly slow in terms of execution time compared to other unit testing framework.
- Quite new unit testing framework, some plugins might not be available.
Overall
Jest is the new star in the unit testing field for javascript, and I think it is worth a try especially the feature of snapshot testing.
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Contributors
Hunter: @superoo7
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Hey, @superoo7 this is really helpful great hunt
Here is my review
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Thanks for the post, I have tried the application. It has a very user-friendly interface and easy use. As a developer, I can say that the app is very useful and convenient to test your js code instantly!
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