JUnit 4 Tutorial - Your first Java Unit Test

In this video I explain how to use assertEquals in JUnit.

[morphman]

That's a great tutorial, just wanted to point one thing out: When you do these test units for live projects, always make a test case that fails first. That way you know the test works as it should and won't give you a false positive.

To take the method in this tutorial as an example, what if the method was written wrong, so that it just happens to toss back -20.0 without actually caring about what goes in to it? Then this test case would show positive without actually doing what you need it to do.
I know, bad example, but just remember most methods have more than 1 line of code in it and anything can go wrong. That's why we use test units in the first place!

[jakubsz]

I love how I'm a university student being taught by a kid. Good job and the future is bright young man!

[COSMOPOLITANWORLD]

Congratulations! You are a talented boy!! thanks for the video

[SamiEltamawy]

You are a talent person... thnx for the video

[BCmoney]

I'm sure you knew and just typed it out for instructional purposes, but for others who wander by... you can simplify the Unit test writing process by generating shells for your tests in Netbeans:
1. Add the jUnit library to your project's dependencies/build path"
2. Right-click on the top-level "src" package and select "Tools --> Create Tests"

BTW: nice video my goodness how old are you and already rocking out code, awesome!?!

[michaeljoc]

Excellent. I am going to try to learn the junit song on my piano. 

[MGL]

Good video. Clear and simple explanation.

[chronopod]

Cheers for the video! Excellent presentation

[dimitrioschatzidimitriou]

Loved this guy! Too much of positive energy! :D

Cheers!

[youeatmetube]

I eat rice too. Btu I haven't fully committed to it yet :) love the series makes my learning jUnit more fun.

[IamWhoISayIAmftwfg]

Hey dude love love the channel! The music is the best part! I have a question regarding the use of unit tests that contain return types. How do you write a test the caters for this as all the tests I've seen contain a void method. Keep up the awesome work!

[sarraoula]

Thanks, it was very helpful !!! and I love the ending song, something very original (y) ^^

[simplyianm]

Hey Ryan, you shouldn't be returning anything from your test. In the video, I test a "multiply" method -- that's an example of testing what's being returned from a function. Hope that helps somewhat!

Sorry I couldn't reply to your comment directly-- YouTube is bugged for some reason.

[zed]

Any video on how to unit test service and DAO methods ? It'll be a great help thanks

[gatomas]

Nice, "import static"! Awesome

[Garyq]

i swear this kid is like a genius hacker

[sliderBro]

Lol ... Awesome ending! And you helped me out on JUnits = Like.

[alexandersharma]

cool video do you have any cheat sheets for junit 4 for an interview

[andoy_abarquez]

I eat a lot of rice too :D
Thanks for the tut men.

[AeolusMN]

Parents with high expectations that keep pushing thier children.