An Introduction to Test-Driven Development in JavaScript

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Red - Green - Refactor!

Red: Write a test. The test fails because you haven't written any code yet.

Green: Write code that passes your test (and all previous tests). Don't be clever, just write code so your tests pass!

Refactor: There are many reasons to refactor, such as efficiency, code style, and readability. Make sure your code still passes your tests as you refactor.

[omarkabada]

I´m a manual tester training myself to move to automation and do more coding, this video is easy to understand and follow. On why to use TDD, I recommend the book "The Clean Coder" by Robert C. Martin, chapter 5 talks about TDD. Thanks for the video, I will look for more excersices and katas for this.

[alanmejia]

Wow men...We need more videos like this. It's so powerful TDD. Please make more videos of TDD for nodejs, express, etc. Great Tutorial!

[jtshannon]

Great lesson. My team has started using TDD and I really like it. Not everyone on the team gets it though. We still have some people coding first and then writing the tests afterwards.

[heyamjoe]

Have looked around in a lot of places for a great intro to TDD, this supersases them all. The breakdown of red-green-refactor is simple yet succint. Thank you, very much.

[kamalhm-dev]

How to TDD something like API request(post, put, etc)/DB write/read?

[PixelTB]

This is an amazing explanation, thank you!

[JumpPanda]

This was very clear and helpful! Thank you!

[SuperBES]

great tutorial! thank you, will start to implement this method to my coding habit!

[iBen-rypj]

Couldn't we just run the adder function with these various inputs without using jest? What would be the difference?

[ashleypean]

Great and simple explanation. Thank you!

[snakezize]

A simple question here. Can we call this style of testing Behavior Driven Development also?
Thanks in advance.