Jest Crash Course - Learn How to Test your JavaScript Application

Amazing video. Many thanks for mocking example with axios.

for toBeCloseTo() assertion you can see the error not passed test, it show the limit (expected difference is 0.005)

Спасибо за новое видео. Уже давно слежу за вашим каналом, нашла много полезного для себя.

Very cool, thanks! I am starting to learn jest. Your course has been very helpful!

Beautiful video, crisp, to the point and nice explanation!

the course is really cool but the mocks part needed more explination and clarification

Such a nice tutorial, you're amazing. Thank you!❤❤❤

Really nice

There is an error on the jest home page at the beginning:
it says: "Jest is a delightful javascript testing framework".

It should be "Jest is shit and a nightmare".

Best Explanation Ever for Jest, Just Incredible

Laith, you do deserve a 1M Subs for sure!
Thanks for the content.

Thanks. Wish you went more into mocking with classes and stuff.. but I get it now. ❤

great lecture... keep it up

Thanks Laith, liked the course! Would've preferred a few less matcher methods and a bit more advanced info though, like using Jest with ES modules or testing React.

Nice course, very informative I have learned a lot.
Thank You ❤️

I see you're a fan of Traversy Media lol gotta practise that Boston accent to really stick the landing 😜

For anyone who struggled to understand how the mock.calls worked, as I did, too, initially - here is what [x] [y] mean: x represents the index of the call made (i.e. 0 = first call, 1 = second call, 2 = third call etc) and y represents the index of the first argument we find on that call (i.e. always 0 as we only have one argument).

So, taking our example in the tutorial 'expect(mockCallback.mock.calls[1][0]).toBe(1)' - [1] represents the second call and [0] first argument, which in this case is 1. Hope this helps to clarify and keep up the good work studying!

Thanks Laith Academy! <3

Can you please tell me how to write unit test for a button click..

thank you

Very good and helpful crash course👍👍👍

I love your contest Laith! Been following your content when you had only few hundred subscribers : ) Do you have any plan to make web3 development tutorials in future?

Thank you sir

Does it include api and database mocking

Real nice tutorial L. Thanks for your hard work. 🙂

This channel is incredible, your teaching skill is great. Thank you, I appreciate what you're doing on this channel.

You are the GOAT thanks a lot!

Not sure if mentioned but I believe a mocked module/function must be included/required in the test code.

Great stuff, thanks for this!

cool thing. nice explanation

Nice! Especially thanks for mocking example with axios

Thank you so much. since long I was not able to get understanding of mocking which you explained practically in good way.. thanks and keep on.

It's a bad practice and something to avoid when testing real endpoints. You should have a mock data, preferably using MSW package to mock your endpoints. Never test real endpoints.

Nice course but I didn't get mocks

Very helpful video! Thank you!

Laith, very good tutorial on Jest. Do you have any tutorial on JEST with LWC component to test field value on clicking submit button in the LWC.

Thanks Laith

Please a video for testing next.js with typescript

Are you Brad? :)

Nice tutorial 👍

thank you for this

Great course, thanks for including mocks and not just the simple pure function stuff.

Thank you .
The mocks part in the tutorial needs to be demystified more.

Thanks for providing Jest & React testing Library courses 🙏

I have to say, you have the best quality tutorials out there!

wow you create the video in one shot, that is amazing