Your channel is pure GOLD! I'm learning more in a few minutes than an whole semester of classes.

@jeromepincus8529

8 ай бұрын

So true

Today, I crashed production because I didn't review and test my code. This was a valuable lesson for me. A colleague with more experience showed me how I could have detected this error through unit testing. We wrote 8 test cases within 20 minutes that could have assessed the functionality of my changes, and I would have noticed the bug. I am glad that we have an open culture for acknowledging errors, and that I was 'allowed' to make this mistake.

@marmont8005

9 ай бұрын

I didn't realize how I had caused this error until we received emails from the company. In a mapper method, I used .filter(Objects::isNull) in a stream filter instead of .filter(Objects::nonNull). This led to the occurrence of the error on 6000 devices. It dawned on me that a slight oversight can impact hundreds to thousands of people. From now on, I will be more conscientious and refrain from putting my code into production until I am 100% sure that it performs its intended function.

@JoeyCodes

5 ай бұрын

How are ya'll getting jobs out here not knowing how to test your code ;-;

Honestly there's no better refresher course on java unit testing than this. Short, precise, keeps your gears turning and leaves you wanting to know more. Thank you so much John.

Concise, Crisp & To-the-point. Short videos, really time saving. Great work John.

Thanks and kudos for the Coverage aspect in Intellij IDEA.

"run our test with coverage" was a requirement for project...Its clearer now. That was a treat. Great video

These are all wonderful. I'm a retired Java 6 programmer writing Minecraft mods in Java 8, 16, and 17. Your videos are clear and concise! They help me a lot.

You're brilliant! I'm a senior Java developer but I don't have these didactics and ease to explain/teach. Awesome job

I've been trying to learn unit testing for ages and this made everything so much clearer!

THIS IS AMAZING! I loved how you provided context and explained everything so clearly!!

Hi John, thanks for the video. I have to write my own unit tests for a project assignment, but have never done or got properly shown how to. This video cleared all my questions.

John, i almost said that this was the most easy topic i learned in java, but when i read other comments, i realized its because your teaching method is simply great. I’m glad i found you!

Best video ever on JUnit by a long shot. Would really love to see more advanced videos on this topic!

I'm really thankful to you. I'm currently in the process of studying. And I researched it because my doctor didn't talk about it and I found a similarity between it and the Java language, but it's not a regular Java, it's a test for Java. Thank you. I really understand. And of course I'm proud of myself because I researched who you might laugh at. But that's true. Thank you again❤

As a Java developer, this channel has been very helpful to me in every way.. Thanks to you.

Hey John! I took a course in the fundamentals of computer science last year where our professor mentioned the importance of unit testing and made us all write our own ones without really explaining the reason why or showing how to properly do it. This video really cleared that up for me. Thank you so much!

You are great John ! I really enjoy your videos, they are so practical but with a lot of useful information and knowledge. You do that complex topic looks really easy and funny. Keep with this awesome work. Thank you !

Thank you for this video. It's clear that this video is just a summary of what unit tests are just like you said. However, only your video was able to really make me understand what unit testing in Java is about.

This is the best beginner friendly unit testing tutorial I've found so far

Hands down the best Java channel on YT. I love you John. You just very clearly explained to my dumb brain what the rest of the web really struggled to achieve. Thank you!

A video on lambdas expressions would be so awesome, especially when the concept is partnered with runnable class instances. These together are the only way I know in java to make a responsive GUI application.

I enjoyed the topic of the video, since unit tests are not necessarily what you have to do at school (and it's not in the curriculum). What I also liked was you switching to IntelliJ. I've been experimenting with my students, and we tested 3 different IDEs. They said that they felt most comfortable with IntelliJ and also appreciated the helpful tips that guided them towards fixing errors. I'd also like to give you props for the way you present the topics, among them being voice, intonation, gestures and pace.

@noobster9212

Жыл бұрын

Truth to be told, curriculum for computer science in most university is outdated. Most lecturers stopped learning new things whereas the cs world is evolving every second.

@ngndnd

Жыл бұрын

im taking a junit class rn and its a complete joke of a class.

@albertbokor6643

Жыл бұрын

We actually have a course that goes all in on these features. It feels a bit awkward to do this much stuff for a conceptually small assignemt project but still something practically useful.

@gabrielv.4358

9 ай бұрын

so true. intellij is the better of them all, and its free

Thanks John, I understood the basics of JUnit test in Java through your easy to understand examples. 😊

I have been watching since a year. Your videos are very simple to understand. Thank you.

Been exposed to introduction of JUnit today, lucky to have this lesson!

Hi John , you are the reason who i love the Java. Every video is incredible understandable. Thanks a lot 😎

Hey John Thank you so much for this video , you were just explain the basic unit testing in a simple way. This is a great video for beginners.👍

Awesome vid John, thanks for going into so much detail in an actual use case!

Thanks John. Finished your lecture then went to try to implement a few of the junit5 test methods for the very first time. Your explanation was very good. One thing I wished you touched was how to resolve dependencies needed to run junit5. I grabbed one of the dependencies in mvn repository Jupiter-engine and that seemed sufficed to resolve my missing assertTrue(). These small things very briefly but ought to be covered In your demos I think.

Simple and precise illustration. Thank you John. Probably including parametrized junits supported in Junit5 would be better.

Thanks for this video! I recently joined my first hackathon and I was looking forward to using unit testing in Java for the first time, you explained it very well and it was easy to understand. Nice work :)

@carloschacon5951

2 жыл бұрын

MinTIC???

Thanks John. Another crystal clear explanation. Straight to the point 👌 💯

thank you, i was able to create and test individual test cases with this video.

The one testing framework I've ever loved and enjoyed was RSpec for Ruby or Rails. Extremely easy to setup, read and write tests.

Thanks a lot John. I started loving Java after watching your videos! This topic was so interesting.

That is insanely complicated, wow! So cool!

Thank you very much for the video! The teaching and English are perfect for people who do not speak English as a native language.

needed a refresher as i apply to sdet jobs. excellent clear stuff. thanks.

Hey John, congrats for your content. It's really clarefull and understood. Thanks from Brazil, let's keep coding.

i have not understands this topic in my class but now i am perfect with this topic.... Thank you professor

going through your classes while taking part in a bootcamp. really appreciate your help!

@CodingWithJohn

Жыл бұрын

Glad it's helping!

John your videos are great, clear concise and informative.

Hey John! Thanks for your hard work! You do great job with this short explanatory videos! Create one with lambda expression please! :)

Thanks for your video sincerely. Every time I learn new things from you.

Great explanation! Great work! Simple and to the point Thank you!

This video has made me subscribe. So well spoken and well communicated I had no choice! Thank you for this very informative video

Had an assignmen to perform unit testing in Java usign the Junit . Was recommended to watch this video of yours . Your doing a great job ceating content for beginners like me Sir John . Had to subscribe ! Keep up the good and humble work !😇

@CodingWithJohn

10 ай бұрын

Awesome, I'm glad it helped! And thankful to whomever recommended it!

Very noice!!! As a “beginner” learning on my own these lectures are important lessons. Great Intro exposure to thinking about writing code holistically. Ty. 🙌🏿🙏🏾

@mohamedibrahim-qm1cr

2 жыл бұрын

we should be friends lol i'm also just started Java! maybe CodingMates?

@mastershonobi110

2 жыл бұрын

@@mohamedibrahim-qm1cr where are you in your journey? Are you taking a course? With who? Asking for potential friend. Lol

@mohamedibrahim-qm1cr

2 жыл бұрын

@@mastershonobi110 just in java for a week now, I'm in a bootcamp plus resource from Plural Sight.

@theblindprogrammer

2 жыл бұрын

Yes, John's instructions are clear and to the point.

@theblindprogrammer

2 жыл бұрын

@@mohamedibrahim-qm1cr Which level are you in? Did you reach objects and inheritance?

Hey John, Thanks for your great work. Your content and explaination is exemplary

very nicely explained in short time and covered very good scenarios!! Thanks for your efforts :)

Great intro to unit testing John, awesome! Thanks!

Very cool stuff for a java beginner like myself )) thank you!

now 2:23 am, but I'm sitting and watching you. It's so cool. Firstly I'm learning Java, secondly I'm improving my English (at least listening)😍

This is an awesome tutorial on how to write JUnit Tests. You explained this so well for a slow learner like me. Thanks for the help!

@CodingWithJohn

Жыл бұрын

Glad it was helpful!

That was so well described. Very very helpful. Your videos are also produced very well.

Awesome overview and introduction to JUnit, thanks!

I've always been scared of Testing, thanks to this video, I feel quite comfortable with it now.

Beautifully explained! Thank you very much!

Thank you very much for sharing this in such a clear way.

Crystal clear explanation, thank you!!

Very organised and very well explained, Thank you!

Hi John.love your videos..you explain both concepts and code very clearly..could you please do a video around stack/queues and bfs/dfs algos? Thanks a lot :)

Another great video John! Looking forward to the jvm memory management video; if possible please give it a shot ...

That was excellent, love your tutorials!

Hit the like, if you have been watching many tutorials and finally, you get the proper context with clear explanations.

That was awesome john! great explanation! Thank you so much.

Thanks so much for the tutorial. It helps a lot!

This video is amazing! Thank you so much for sharing!

Wow! Thank you so much! Your video is really helpful and engaging! Keep it up,pal!

Hi John, Thanks for all these videos. Please make a video on concepts of functional interface and lambda expression.

Thank you John, much appreciated!❤

Every time i look up something on youtube regarding java, and I see johns video available on that topic, what a sigh of relief, hushhhh.! 😅

@CodingWithJohn

2 ай бұрын

Let me know if there's something crucial I haven't covered yet!

Thanks for making current and superior Java videos

TY!, the exception part was the best in the video!

Easy to follow, comprehensive from my beginner's point of view, and to the point. Do you recommend someone else's deeper dive into unit testing specifically, or say (integration) testing more generally? Thank you. Oh yes: subscribed.

Wow I pretty much appreciate you John I am so happy to get your channel

It's a wonderful video!! Many thanks John

Your contents are really helping

Long time programmer but never wrote a single unit test. Its this thing i know i should do, but I seriously never have time for. This video is a actually a great example, ur unit tests tend to use as much or even more lines of code than the original. In the real word the next deadline is always yesterday…

Hi John, thanks for making these awesome java tutorial videos. I've been looking into invariants in java and no one knows how to simply explain concepts like you do. They all have these long drawn out explanations that don't make any sense to anyone without years of java experience. Can you please make a video on invariants? Thank you in advance.

Amazing how much you covered in 21 minutes!

Awesome! Thank you so much! Great explanation.

John you are the best of the best. Keep it up and would like to see some Spring boot tutorials. Many Thanks

underrated java youtuber, man deserve more views, thanks for the tutorial

I actually liked the video even i did not started to watch it yet. I wanted this video to come so much. Thank you

@CodingWithJohn

2 жыл бұрын

Hope it lives up to your expectations!

Your videos are amazing!! I wonder if you would decide to tackle the module-info files. Will look forward to them!!

Thanks. Got a clear understanding.

Nice intro to unit tests! An intermediate one about Mockito would be an excellent progression.

this was just amazing. very well explained.

Nice tutorial and well explained as usual. Thank you

Love your content! Keep on, John!

John! Thanks a lot!!!! Your video was super duper helpful! Really simple and clear for a novice!!! Like and subscription!

thanks John, I learned some new info from this lesson

That was very informative . Thanks for sharing your knowledge with us

This video was amazing, thank you!!!

Hi John, great stuff can you have some videos over dynamic programming and design patterns as it would be helpful.

Thanks!!! Eezy tutorial on unit testing

Very well explained! Thank you.

U are amazing bro. For one video, I understand Unit testing.

Thank you for this great tutorial.