Simply the best explanation from entire KZfaq. I'm studying react from 2 years and test library was the worst part to find some good videos. Congrats!

The most useful react jest testing tutorial video currently on KZfaq. Thank you!

For a 3 years ago video, this is high quality staright to the point content. Thanks Man

Thank you so much for this tutorial! I would agree with the other comments too about seeing a more involved testing suite using a state library. But this was by far the best video I've seen on using jest. Keep the videos coming

Excellent video! I have been waiting a video like this with React Testing in an useful way for a long time.

Thank you Kris for the wonderful learning videos . Just a small suggestion. The test was failing with '' so at 16:44 please change from expect(todoElement).toContainHTML(''); to expect(todoElement).toContainHTML('strike');

Uff thanks man! I have been all day reading the jest and react docs and wasn't understanding how to use these techs XD you just teched me how to properly unit test my UI lib.

Great tutorial mate, would love to see a more complicated test suite on a component that is using redux!

Bru, your voice is so soothing. I'm rewatching this video tonight instead of ASMR lol.

Excellent video. I went from zero to added to my projects in 22 minutes and 15 seconds

Excellent tutorial, lots of good info in 20 minutes!

Very simple and so far the best. Thank you.

Perfect tutorial! Really easy to understand

most useful video so far ! :) Thank you!

Hi Kris ! thanks for explanation, I know this video is 2 years old, is it possible for you to re-explain it with current state of Jest + React Testing Library? Probably some improvement here and there? And maybe you could help to explain about testing user event + mocking child component inside the component being tested. Thanks ! This is a very simple and great tutorial 👍

thank you so much for great and brief react test explanation

Thanks for clear and simple explanation.

please do more with testing!

This was so helpful. Thank you!

Nice quick start.

toContainHtml method expects to pass html tag as a string without tag notaion so you need to replace '' with 'strike'.

Excellent, thanks a lot, was good to watch.

Very good video, explained in a simple way :)

Great video, really well explained, thanks :)

Amazing video. Thank you!

Excellent tutorial!

Bro can yu make videos for async methods RTL testing. Some other examples which helps real time project experience. This video is also good . If you make those tht would be best ❤️👍

Great tutorial , TNX.

Great stuff man!!

awesome content , thank you very much your time.

Thanks a lot. Very helpful

Great video. Very helpful

This video is really good

Thank you so much!

Great guide!

thank you! subscribed!

Great! Really helpful

Nice overview of testing with Jest in React! BTW the Todo component inside the map loop is missing a key prop. ;)

awesome content, thank you!

Thank you, that was great. The only part i didn’t understand was what is snapshot

Perfect time and a perfect example thank you!!!! from PH please do more sample like using hooks State T.I.A

new subscriber, clear class

Great video!

Thank you Kris.

Thanks bruh ❤️ Can u make more of these vedios How how to test for the data in a component which we r getting from api.

Great content!! Thank you.

Nice hi Kris, From Ireland too

Totally Awesome!!!

Hi Kris, thanks for the video. 21:26 How did you manage to reduce the test execution speed from 2+ seconds to 0.666 seconds? I did the same steps but mine didn't change.

Thanks for this video bro. Will u start a video series on Reactjs testing just like using, mocha, chai, cypress, knightwatchJs, jasmine, karma, react testing library, etc?

I'm getting the error as SyntaxError: Cannot use import statement outside a module, can you please help me with this

Thank you so much for this vedio great vedio

Good video, but why did you `mock` the props in the test file? Isn't there a more elegant way to get the real props that are passed to the component?

thank you so much

toContainHTML function is not working properly, can you please help?

Are you using any extension for jest intellisense?

thank you

Can you make a tutorial about react redux unit testing?

in what circumstance will the snapshot not match?

what window manager are you using?

you should create more tuts... you`re good. thanks

how do you test apps with usecontext and api calls in them

12:10 is tag still used for now?

HI.............the node version u used is 14 r 16........? Please share me i tried in both version 14 and 16 but its not working.

Top, thanks!

Which node version you use

U are awesome.

getting an error for this line: import renderer from 'react-test-renderer'; I install the package by npm install react-test-render , anyone know.

what if we want to have more folders in __tests__ ?

What is the extension you are using in the console? Thanks for the tutorial btw.

How to write a test cases for big component lets say I have component with big business logic how could I write test cases for that

I'm using Vite and not CRA, so the script for test does not exist, how do I set it up?

Thanks for the video. How do we get that back quote in the VSC in the data-testid={'todo-${id}'} ?

it there a git repo for this?

I've got pink panther in my head now with all these 'todo, todo, todo,...' Nice tutorial still

thanks

Can you please upload. how to test redux login page

The usual flow for TDD is to write the test first, watch it fail, and make a minimal effort to get it right and then refactor. But anyway, greate video.

Why does my simple tests take so long? A simple expect(true).toBe(true) takes(2ms) but Time was 3s (yours was 1s) Edit: I was able to make it 1.9s with --maxWorkers=50%, but idk if there's more to do

Need a more advanced tutorial where the API calls are mocked

nice tutorial. Just one thing.... toContainHTML receive just the name of the tag without the ""

🚀🚀🚀

Kewl

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Thanks for taking the time to make the video on the topic. I am running into a problem, near 17:07, where you place the below line of code in both tests. expect(todoElement).toContainHTML("") I get the error saying expect(element).toContainHTML() Expected: Received: Make dinner Can you please tell me why it isn't working for me?

Instead of: import renderer from 'react-test-renderer' use: import TestRenderer from 'react-test-renderer'

you have the voice of Ross from friends, not the accent though

So annoying how they change the api

why sompeople speak about .babelrc or babel.config.js ? you don't speak about that

my 2 cents - I believe that a to-do item would typically be an item in a list, therefore don't use DIV tag but LI (list item). it will also help your accessibility efforts and spread good practices and love :) edit: the same with the h1 element use - h1 is a main header of a page, Header level 1. pages should typically have only one element like that. why not use just P, Span or Strong instead? (check udacity course about Web Accessibility) + I'd love to see how you test state changes of elements, especially of parent and child element, each of them having co-related states

nice tutorial, back up from the mic a bit, hearing your mouth function is quite unpleasant.

The lip smacking is just terrible. Why do people do that? I really want to watch your content but the lip smacking just drives me insane. It is so avoidable, it's like people don't take the time to listen to their audio before posting.

Not a fan of the const H1 stuff. Nope. And I hate tests. I think I hate every testing video on KZfaq.

Hi, thank you for this video, but expect(todoElement).toContainHTML('') is not working seems it should be expect(todoElement).toMatchSnapshot('');

Hi, Can I have your email id? It was not mentioned inside the 'About' section of your channel.

Nice explanation. Although expect(todoElement).not.toContainHTML(''); this test does not work.

thank you