Test-Driven Development (TDD)

Source

A simple explain to TDD

Why should I do it:

• Tests have a short feedback loop, enabling you and your team to learn faster and adjust
• Less time is spent debugging, allowing you to spend more time writing code
• Tests act as documentation for your code!
• They improve code quality while reducing bugs
• After refactoring code, your tests will tell you whether the change has broken previously working code, and…
• Tests can prevent your hair line from receding!

This is how it works:

• Write a test. – The test will flesh out some functionality in your app
• Then, run the test – The test should fail, since there’s no code to make it pass.
• Write the code – To make the test pass
• Run the test – If it passes, you are confident that the code you’ve written meets the test requirements
• Refactor code – Remove duplication, prune large objects and make the code more readable. Re-run the tests every time you refactor the code
• Repeat – That’s it!