Intro to Test Driven Development

There are different kinds of testing and why they are important

• Unit testing: test a small unit of code that has few side effects
• Integration testing: test a subsystem that has many components
• End-to-end testing: test the complete system from top to bottom
• Code Coverage: Seeing how much of your actual code is run during a test or production
• Performance testing: Checking the speed of your code
• and there are some other categories
• NB: Ruby community is especially focused on quality and testing