Why should we write tests for our code?
When there are more than one developers making changes actively to the code base, issues and bug...
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Not a big fan of jest, since it has something about 800 dependencies.
Sadly the ide support for UVU is not great yet, however I'm looking forward.
Currently I prefer mocha for backend node code. For mocks I try to avoid them however if I have to I use sinon
Agreed with that! Because Jest pretty much covers most of the functionalities by itself and it is not as flexible like others :)
Mocha and Sinon makes a good combination too!
you should also mention proxyquire since sinon does not cover everything.
Mocking 3rd party deps is easy with jest, however requires some tinkering with sinon.
Sadly...
Well, I guess nobody is perfect :) Basically, I stick with Jest for the initial setup, and will combine with other libraries when necessary
In my experience that works well. I just got paranoid with the recent supply chain attacks 😂
I like Jest but it quickly becomes a mess when introducing Typescript, and testing backend code.
Mocking named exports is a big mess.
Other than that I like Jest (except for their ties to Facebook evil )
Great article, good for introduction, thanks
Thanks for leaving a comment :)
Yea... It needs a lot of workarounds when it comes to Typescript :)
It does - but I still use Jest as for me its the best all around unit testing framework/library.
For E2E and integration tests, I swear on Cypress, but Jest rules for unit tests.
Cheers, and thanks
Thanks! This article has made me curious to see how jsx is tested.
Sure Rishad! I will try to share more of this in the next article ;)
Code, not codes.
Thanks a lot Paul! I have made the corrections :)
Thank you
Good
Thanks!
Thank you for this article. This helped in my journey exploring unit testing :)
No problem! Glad this could help :)
Besides the problems with Typescript it also suffers from memory leaks. I wouldn't event recommend it. It's just used because of herd effect. Tests are much faster and stable with Mocha.
Thanks for leaving a comment Patrice :)
I see... I haven't read up on its memory leaks issue, but I am interested to read up more and will definitely share my findings on that! Thank you for your suggestions :)
Nice article on testing! Interested to see more of this in the future.
Thanks! Will definitely share more :)
thank you for the article. why did u use jest instead of mocha and chai?
I can't wait to see how to use jest on jsx or tsx hehe
Hey Ragil, thanks for leaving a comment! I generally prefer Jest because it provides a lot of built-in functionalities such as test runner, code coverage etc, without having to combine with other testing tools (it's like all in one) :)
However, Mocha makes a good combination with other libraries such as Sinon.js, Chai.
In order to test React, I planned to use methods from RTL and combination with Jest :)
thanks very helpful
Glad you find it helpful :)
Don't.
Good
Why don't you mock fetch itself? Shall we test 'isomorphic-fetch' itself??