Introduction to Jest Testing | JavaScript Unit Tests 

Been using Jest testing for web applications for almost 6 months and one thing that i´ve noticed on the web was the lack of a well structured tutorial about software testing and more specifically Jest Testing. So thank you Dave for the amazing content. Looking forward for a further chapters of this educational content.

Wow, I can't express how excited I am to see you've started a testing tutorial series! 🙌 I've been looking forward to learning more about testing for quite a while, and your videos are just what I needed.

Hello my friend, I don't do testing very often due to very strict deadlines, but it's always good to do so, 8:30 since we're passing an empty string to the join method no commas will be created, on the other hand, passing nothing(undefined) will add commas, Thanks Dave!

Much needed video , please cover unit testing , integration testing, End to end testing , React test library , Cypress

Great video, I like how you use non trival examples and work in clean code principles.

Thank you so much. I have no words to appreciate the way you teach. word.toLowerCase().split('').reverse().join('') won't include the commas. So we won't need the replaceAll part. I know you know this, but you just came up with a quick solution. Mentioned it for the viewers.

I've a request sir please teach us how to test the api via jest I did the testing via jest for my express api but still have some confusion in stubs and mocks especially how we can test the api in the mvc structure like where our controller is interacting with services huge request

pls, continue this. thank you again, Dave.

Sir please make a video on how to test the react component which includes redux, custom hooks with mock api...I mean to test complex react components

Didn't see that comming. Excited for this series

I am sure you get a million requests for topics, but could you please do a data structures and algos course? Basic linked lists, trees and graphs, big O, recursion etc. Your explanations are so in depth and helpful. I would love to see a dsa playlist at some point. Forgive me if you have this and I just have not found it yet.

Nice thumbnail 😂

Oh thank you for this series. I can't wait for you to get to the advanced testing such as making network requests, redux , axios interceptors and others.....I'm watching every testing video you are making....

Awesome intro to unit testing with jest. We use jest extensively at my job. This is a great way to get back to basics, understand how jest integrates with npm, and how to use it to write better code!

I just started testing for an e-commerce web app created with next js and typescript i had hard time configuring jest and typescript for unit and component testing but setup cypress pretty easily i hope this video help me understand jest and testing better thank you Dave for great content

Real nice! Thanks. I will add the tests when the strings are null or undefined.

Cannot wait to see the content about cypress vs jest, and when we need to use them. Lovely.

nice intro to jest thank you, excited to integrate this into my Next.js app

I am so happy that you started doing the test series!! Could I request a content about call by reference vs call by value vs call by sharing? It's quite confusing since it works differently in other languages.

Seriously, Dave! Thank you so much for doing this! Your channel as really helped me grow and progress within my journey! I've been trying to find some content creator that would create content solely for JEST! Thank you so much!

Thanks Dave, you've really helped on my Javascript journey i do really appreciate... I wish you could talk about getting a job, cause i feel I've been writing codes for myself, but all same thanks alot

I have just finished a 3 hours long Cypress tutorial with E2E and Component testing. Let's see what Jest brings us =)) Thank you Dave!

Thanks a lot for starting this series ❤, I can't thank you enough for this series as there almost no good tutorials around testing for web devs, I don't know much about testing yet, but it would be helpful if you could also teach e2e testing, basically enough about testing that is expected from a web developer.

So excited! Thank you sir! Will definitely be sharing on my LinkedIn once done with mine!

Amazing, I need to wrote whole bunch of test in work. Really appreciate your work

Thanks Dave💯 Pure Gold!

Thanks Dave, very clear explanation, I hope you'll continue this theme and also cover RTL.

To avoid wrong autocompletion, you can press the escape key and continue typing

looking forward the next, please update Dave, please!

Great topic 🎉 Thanks Dave

please please please, we need a full course

Thanks for this great lesson hope we see react and typeScript tests soon

Hello Dave, thank you for providing such amazing content. I have recently begun learning how to write tests for web applications and have started using Vitest as my testing framework. Do you think this is a good choice for testing?

That was a good simple intro. Thank you.

Thank you for the amazing content Dave. The timing is perfect.

Thanks Dave. Do you plan to do any DevOps videos for aws in future?

Nice explanation, thank you 😁

thanks dave :) You're great! Will u continue this series. And will it come with nextjs or react. It would be perfect.

thank you, simple and to the point :)

Excellent video, thank you very much!!!

Really waiting for the videos

Fantastic tutorial! Thank you so much! 💛

was really hoping this would be with nodes new internal testing library since it's gonna be available out of experimental with node 20

you don't need replaceAll(',','') already join with empty string will concat all string with an empty string

This was amazing, thank you so much!

Really appreciate your work 🙌

Is this a new playlist? Will you create more about it?

Thanks, awesome tutorial! To me one of the issues ist the frontend, responsiveness and such things. That cannot be done with jest, right? Selenium or others?

for coverage, even if I dont write a test for reverseString, it still shows a 100% coverage

But is possibile to show the output on the browser? Like Jasmine?

Hey @Dave, Could you please create one Next.Js 13 Project using material UI on server side including the state management(redux for example) in Next app ?

thanks , now i am pro unit tester😂😂

Sir I have learned HTML ,CSS and Java Script please suggest me what I will have to read to become frontend developer.

Perfect thumbnail 🤣

thanks

I don't understand how testing libraries work behind the scenes so am like...... What's the point? How about just auto generating all possible inputs and supply to a function and watch the output/returned value? This jest testing appears to run a test using just one value so I don't see the point. But before I blab plenty of nonsense, let me research more about it. Thanks though!

in react? cypress, react-testing-library???

I mean, i just want to test my crud methods and i can't find how to do that

thx

I can't focus on programming becouse i think only about money and how powerful it will make me! How to forget about a lot of money and start focusing on work?

Thanks for the tutorial. Why is this so slow though? It seems every new test adds about a second despite functions being super simple. In a large codebase this would be a nightmare. I don't really have experience testing JS but with Python (pytest) this would take milliseconds.

boss!

You would better not have names collisions (like sum is both function and file name) in toutorial purposes - it will mix up newbies

Thumbnail 😂😂

Please vitest

only girlymen write tests to check their code

'Hellert , Im here revising the video before beginning the testing with typescript video