JavaScript Testing Introduction Tutorial - Unit Tests, Integration Tests & e2e Tests

JavaScript testing - i.e. unit tests, integration tests and e2e (UI) tests - can be intimidating. It shouldn't be! This video guides you through all the basics (including the "Why"?) of JavaScript testing. Master JavaScript testing now!
Master JavaScript: acad.link/js
Master ES6: acad.link/es6
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Read the full article that belongs to the video: academind.com/learn/javascrip...
Starting source code: github.com/academind/js-testi...
Source code after unit test: github.com/academind/js-testi...
Source code after integration test: github.com/academind/js-testi...
Source code after e2e test: github.com/academind/js-testi...
Want to learn something totally different? Check out all other courses: academind.com/learn/our-courses
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• And you should of course also follow @academind_real.
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• Or visit our Website (www.academind.com) and subscribe to our newsletter!
See you in the videos!
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[@SubbingForFree]

11:50 - unit testing 23:10 - integration testing 29:23 - e2e

[@jimread4099]

my man

[@wotizit]

ty weeb :D

[@zakaria4422]

thank you

[@illbet4589]

The Bikini Bottom thanks you

[@danimaietta583]

Thank you :D

[@anindyakundu6323]

This is so coherent and well structured for providing an introduction. Thanks for the awesome video.

[@moatazmahmoud1397]

It's one of the best quick and comprehensive guides around the different levels of test automation. Well done mate, and please guide me if you have any similar videos in your channel that I missed.

[@_isaac_muniz_]

That was a GREAT introduction to testing man. I love how you explain things in theory and using slides before the actual practice. It gives us a better context on what we're doing. Thanks :)

[@ba1anse]

Best video on testing I've seen so far, clear and detailed. thank you so much for sharing!

[@jinkinglee2]

By far the best (free) intro to testing video I've seen on the web. Thank you Max!

[@academind]

Awesome to read that Jin, thanks a lot for your great feedback!

[@ibrahimandaw8780]

You're awesome you always give us what we want. Thanks for sharing your knowledge Max

[@academind]

Thank you very much for your support Ibrahima :)

[@80Vikram]

BLM

[@nhc772]

Thank you Max! Nicely organized video. I watched it several times :)

[@healthcommcore]

Max, can't thank you enough for your awesome videos! I learn best by clear explanation and example--your excellent teach style does both. Thank you!

[@hiroyukinumaguchi1984]

Your explanation with specific code is very easy to understand. I appreciate it.

[@willemvanderveen7567]

I usually don't leave comments but this is really high quality. Thanks a lot!

[@ronniesunshine1163]

This is insanely useful. I regret not learning how to do testing 1.5 years ago. It would have saved me hours, if not days worth of time in testing manually

[@tomervainshtein5863]

Scratch that, think about the time you would've saved while debugging errors on the e2e layer! Unit testing forces you to separate your code into small chunks and test everything as soon as possible. Crazy useful skill!!

[@phamtienthinh1795]

For someone who wants to take a look at the overview before dive in the specific part. I really appreciate the way you write your description: Extremely useful

[@khammassihoussemeddine1193]

i wanna mention something there is a long while since i watched a video in your channel and wanna say that you get so much better at explaining and you feel much more confident and experienced keep the good work up Thanks for this fruitful content

[@blakearcher9247]

Two years and 180,000+ views later, but on the off chance you see this.. THANK YOU. I have never seen a tutorial so well put together easy to understand. As a self taught developer over the last 9 months I cannot believe I have never seen your videos before. Please keep it up!!!

[@jonaskromwell4464]

Best unit testing from the ground up I've seen so far on all the world wide interwebs! Been paying for tutorials, searching high and low... Thanks for putting this together beginning with testing a most BASIC function that returns only a string concatenated value. This is what I've been looking for!!! The one thing I don't see anyone doing (neither professionally nor in any demonstration) is to combine debugging with unit testing functions. My biggest benefit to TDD is to setup the expectation prior to writing the function and write the function to satisfy that. That way, I am testing mostly functions only and, by the time it's completed to satisfaction, the test enforces the outputs from the function. The test is done and the function is done. I do not understand why more developers do not work this way.

[@illuviumfundamentals7966]

This is a brilliant video about testing and is definitely a must for devs trying to learn to test their codes for the first time. I am super glad there is a video this clear that does not expose unnecessary complexity of other modules are not required to do testing. Its focus on testing and its conciseness made me understood the three types of testing in only one watch. Sincerely, thank you.

[@nat6106]

Really high quality video - both the content and the form (some graphs when needed, some code when needed). Thanks!

[@academind]

So happy to read that, thank you Jack!

[@souravprasaddas5909]

A genius instructor in the world. Now I have no fear in JavaScript. U made my development journey so simple and interesting. Thanks a lot from bottom of heart.

[@yassine_klilich]

best video i have ever seen that shows the differences between those types of testing

[@yveltdesamours5225]

Things become so clear after having your videos. Thank you Max

[@alansenderovich642]

Thanks Max, you're really the king of teaching. Thank you for so much value in your videos. Please keep it up!

[@ekaterinahorton768]

Your videos are great! Very often use them to learn/refresh/structure information. Thank you very much for your work!

[@academind]

Happy to read that Ekaterina, thank you!

[@AmitKB00]

An excellent walk through from concept to uses example. It helped me to get familiar with testing.

[@adrianbartholomew3785]

I think that this is the best instructive video I have ever watched.

[@EricOnYouTube]

Another amazing tut by you. Danke dir vielmals, Max. :)

[@sandeshsmagdum]

As usual you are the most reliable instructor to depend on. I am enjoying your videos on Udemy. Waiting for many more videos on this topic that will help me in pure TDD and inculcate TDD approach in true sense. Thanks Max 🙂

[@geraldoagohoue3132]

I can't find a better introduction course to testing. I've been struggling for far to assimilate testing. I'm currently taking a course on the topic but I still can't get the whole thing. With this video, everything I previously learned has become clearer, and now I can make a clear way to progress and fully conquer testing. Thank you so much @Maximilian

[@laurelineparis5407]

I'm really impressed each time I'm looking for new things or concept to understand and explore because I'll always find you either on udemy or youtube video answering questions I've been asking myself about some vocabulary point I did get quite well. For couples of weeks, I've been trying to understand : - testing, - thinking about when and where to add typescript and what to test ( as working with jest we should only assert output instead of type, which typescript should do instead I reckon ) - that there were few kinds of testing, - that actually I was not grasping the difference between unit testing, functional testing, integration testing and where was E2E in all that ( ends up with E2E was actually functional testing ( and not hard-related to test one function ), unit test was actually this kind of test where you actually test one function ) , then got lost with integration test. Your explanation was confirming some though and also made me understand better what was integration tests : testing function with other dependencies ( == other functions ). Can't wait to go deeper and make it to the tests automation. Thanks again for your explanation

[@BD90..]

Great thanks Max, it helps me understand the javaScript testing better than just reading a document. Now I will go and learn more on using Mocha.

[@parasarora5869]

you made testing look so damn easy...i love it and want dive deep into testing !!...thank you very much sir amazing video !!!!!!!!!!!!

[@codewithnacho]

This video is awesome! It perfectly shows the three most common types of testing. Thank you very much Max for sharing this!!

[@academind]

Happy to read that the video was helpful for you, thanks a lot for your comment!

[@Dima-jc7fx]

This is great stuff, thanks a lot! Would love to see other testing-related content from you Max :)

[@academind]

Thanks a lot Dmitry, I might indeed dive deeper into testing in future videos.

[@johnnydorelli1]

Great Max, maybe the best teacher existing about programming languages!

[@cemsaglam1696]

It is thanks to this video (and to a test I wrote for validateInput) that I can say, the "+text === NaN" check in the validateInput function always returns false. So if I send "isNumber: true" to the function, and as text input "12e", it would consider it as a valid age. Using "isNaN(+text)" solves that. Thank you, Max, for such a great introduction to js testing!

[@nickharalampopoulos]

Green is a beautiful color! Thanks Max for the tutorial.

[@zoecarlibur]

Thank You, I learned so much. It seems like JS testing is now one of the must haves when applying for jobs these days.

[@academind]

Thanks a lot, happy to read that the video was helpful!

[@dallasearle7394]

For anyone having issues with the end to end test not completing the automated test at around the 35:00 minute part it is simply because Jest is timing out and you just need to refer to 38:29 to fix that.

[@godhandinfamous]

Thank god it arrived!

[@solarkadakiadam]

i love you max, you're great man, i've gor your react, react native, nodejs and mern courses on udemy, and i never wanted to learn about tests but now im learning and youre great man

[@jagmohan4505]

Really I was wondering about how testing done and then I got this video. Thanks Sir.

[@borystyminski8581]

Great vid, thank you Max. I need to disagree with one thing tho. 32:00 - "async/await does it (then and catch) for you" async/await doesn't catch errors. You would need to additionally use `try {} catch (e) {}` and await within try block in order to catch errors from the promise.

[@davidrodriguezramirez1941]

Just loved it, best tutorials all over the web man

[@dawid_dahl]

Excellent video as usual, thank you! Most people only show unit testing and I'm like, "Yeah, but..."

[@kylerebstock1487]

Loved that you used puppeteer too! Cypress is a nice tool to use very similarly as well. The only thing I saw missing was integration tests for api and integrations. Would love to see that!

[@magpinybo7524]

This video will still be relevant in 2030! Thanks you very much.

[@jonathangreene685]

That was an amazing video thank you so much. I loved how to showed and explained how puppeteer was working. Thank you.

[@academind]

Glad it helped!

[@DavinirFCamposJr]

Another excellent video, as always. Thanks, Max!

[@academind]

Thanks a lot for your great feedback Davinir!

[@geragamo]

Max, thanks for this amazing video, congratulations !

[@user-kl9yy3rs6k]

Straight into and out of the point. Thanks.

[@fuanka1724]

Very nice and clear. Makes want to write more unit tests. Thank you!

[@academind]

Happy to read that you like it, thank you for your comment!

[@taufiqprotick877]

This is a really great video! Thank you so much!

[@thevirajshelke]

Exactly what I was looking for! Very well explained :) Thanks a lot :)

[@arianh]

That's an amazing crash course about testing in JavaScript, it's so complete, I really enjoyed watching it, I've learned lots of things about testing thanks to Max, So Thank you so much, Max for this awesome crash course, You're the best💙🥰🙏🌹

[@nickgreen4336]

Max, I guess it would be a great idea to create a full course about testing, maybe using TDD, some React testing and so on. This is a course I wanna see from you so much and I hope, that one day it will become true ;)

[@burajirujinslash]

Wow! Great Job!! Thank you very much for this video. Looking forward to the next one

[@academind]

Thanks a lot for your awesome feedback Eduardo, this really means a lot to me!

[@diyskipper]

Your channel has helped me tremendously!

[@academind]

Just awesome to read that Elem, thanks a lot for your comment!

[@gsffm9044]

Great examples. Please more about testing.

[@emredemir6637]

Thanks. It is a very good and simple way of diving to the testing.

[@academind]

Thanks a lot for your great feedback Emre!

[@MrGreenpaulo]

Brilliant video, thank you Max!

[@Marina-mm6mi]

Fantastic, thank you Max!

[@rajesht9702]

Thank You Max. Very well explained.

[@extraxt]

Max, i'm a student of your Udemy courses. This video was great, because i didn't understand how integration tests and e2e tests works. You're always able to explain the things in a simple way. Thank you Academind.

[@academind]

Thanks so much for your wonderful feedback Rafael, happy to read that you like my explanations!

[@emmapaul]

This video is awesome in explaining how to write and run test

[@andresarbelaezacevedo4907]

Excellent video max

[@bartekpacia]

Incredibly well explained. Thanks a ton!

[@academind]

So happy to read that Bartek, thank you!

[@ALEXEIS]

I just like this dude. He's always happy. Although it pretty normal to express some happiness when making KZbin videos, however, there's something different about his. Wish I could meet him one day. More power to your elbow.

[@academind]

Thanks a lot Alexeis, I would indeed say that I'm a quite happy person, cool to read that is also visible in the videos!

[@mostafashawki]

I would say for every developer: "The most valuable courses you can see here on Academind" Thanks a lot Max :)

[@academind]

Wow, that is awesome to read Mostafa, thanks so much!

[@alexandertarasenko3038]

Hello Max, you are a real saver) You always cover great topics. Thank you!

[@academind]

Thanks a lot for your comment Alexander, just great to read that!

[@user-zo8xg3ps9l]

Thank you! I studied a lot of about Web programming with your videos. :)

[@academind]

So cool to read that, thanks a lot for your comment!

[@_the_one_1]

Great!!! Thank you Max

[@sagaryadav-qn4ed]

Thanks for the nice explanation , I am back end developer but you inspire me to learn front end technology. Great :)

[@academind]

Happy to read that Sagar, thanks a lot for your comment!

[@gudofabi314]

I love this tutorial. . .I hope you made more vids to help developers like me :)

[@hoyinleunghk]

Very clearly explained, thank you

[@imranhossain6443]

This was really helpful. Thanks Max.

[@crystalyun833]

You are a game changer. Keep up the good work! subscribed :)

[@academind]

Thanks for the sub!

[@davidcondit388]

Perfectly explained. Thank you!

[@sprintwithcarlos]

This is the best testing video ever, you are a sensei

[@academind]

Thank you very very much Carlos, this honestly means a lot to me!

[@elcio-dalosto]

This video is from 5 years ago, but still very useful, and I think it still be for some years to come.

[@Aalii6]

Exciting topic, thank you!

[@maheerali531]

I really appreciate this tutorial.

[@roopamgarg1085]

Awesome video again.... thanks a lot for this video..... and also a small request.... for making a video on a scalable node js backend that can handle many requests at the same time and have a better response time.

[@khalidelgazzar]

Great video .. very well explained.. thank you Max!

[@finitebites]

Awesome, as all your other video courses!! Thanks!

[@academind]

This really means a lot to me Moises, thank you very much!

[@vpetevotov]

Brilliant! Thank you :)

[@danilosampaio6493]

A huge thank you man, this video was so enlightening

[@academind]

Awesome to read that Danilo, thanks a lot for your comment!

[@TheRohit382]

Thank you Max. Great video :)

[@nscarg]

Muy claro, muy buen video, muchas gracias

[@klilaayed6483]

Thanks max I was waiting this course

[@academind]

Happy to read that Klila, thank you for your comment!

[@Krishtal3]

Thanks for explanation and examples, it actual even now

[@abdulmoeez13]

You Are a Blessing For Us ❤️🔥

[@Vittokm]

Always very good content!!

[@pprathameshmore]

Thank you sir. You are always awesome teacher.

[@jashimuddin891]

wow! its really awesome. Thanks for sharing Max👍

[@academind]

Thanks so much for your comment Jashim, so cool to read that you like the video!

[@user-uc3et8ih6g]

amazing video!!! thanks for helping to teach unit test!!!

[@rinatvaliullov3247]

Cool tutorial! I just wanted to learn testing and found your tuts.

[@academind]

Great to read that Rinat, thanks a lot!

[@Sergey-mr6be]

Absolutely great video. Thanks a lot!

[@academind]

Thank you Serge!

[@leeyahav4754]

great video and great explanations . you fixed my head thnx a lot

[@tertuliangal7878]

Awesome explanation!!

[@benstuijts5620]

Great tutorial, with Some good real life examples. Please continue to react and react native testing...

[@academind]

Thanks a lot Ben, I might also have a look at React testing in the future.