React Testing Tutorial (Jest + React Testing Library) 

Simply the best explanation from entire RU-vid. 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 RU-vid. 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!

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

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

Very simple and so far the best. Thank you.

Excellent tutorial, lots of good info in 20 minutes!

Perfect tutorial! Really easy to understand

thank you so much for great and brief react test explanation

Thanks for clear and simple explanation.

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 👍

Very good video, explained in a simple way :)

This was so helpful. Thank you!

Great video, really well explained, thanks :)

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 ❤️👍

please do more with testing!

Nice quick start.

Excellent, thanks a lot, was good to watch.

Amazing video. Thank you!

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

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

Thanks a lot. Very helpful

Great video. Very helpful

Excellent tutorial!

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

awesome content , thank you very much your time.

Great stuff man!!

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.

thank you! subscribed!

Great tutorial , TNX.

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

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?

awesome content, thank you!

Great guide!

new subscriber, clear class

Great content!! Thank you.

Great! Really helpful

Thank you so much!

Thank you so much for this vedio great vedio

This video is really good

Thank you Kris.

Nice hi Kris, From Ireland too

Great video!

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.

Totally Awesome!!!

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?

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

thank you so much

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

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

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.

thank you

Top, thanks!

Can you make a tutorial about react redux unit testing?

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

U are awesome.

Are you using any extension for jest intellisense?

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

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

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

what window manager are you using?

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.

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

Need a more advanced tutorial where the API calls are mocked

in what circumstance will the snapshot not match?

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

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

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

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

Which node version you use

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

thanks

what if we want to have more folders in __tests__ ?

Can you please upload. how to test redux login page

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?

it there a git repo for this?

🚀🚀🚀

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

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

Kewl

So annoying how they change the api

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

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 RU-vid.

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