This course has been updated! We now recommend you take the JavaScript Testing Practices and Principles course.

Check out a free preview of the full Unit Testing JavaScript (with CoffeeScript) course:
The "Test-Driven Development" Lesson is part of the full, Unit Testing JavaScript (with CoffeeScript) course featured in this preview video. Here's what you'd learn in this lesson:

Before writing any application code, Dave begins with the unit tests. Part of test-driven development is writing the specification for what the application should do before implementing the functionality.

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