Learning Behavior：driven Development with JavaScript
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Chapter 1. Welcome to BDD

Before we start coding tests, we need to understand what behavior-driven development (BDD) is and how it differs from test-driven development (TDD).

We need to understand not only the concept of BDD, but also all the jargon associated with it. For example, what is a feature? Or what is a unit test? So, in this chapter, I will try to clarify some common vocabulary in order to give you a solid understanding of what every technical term means.

In this chapter, you will learn:

  • The reason for writing automated tests
  • The workflow prescribed by the test-first approach
  • What BDD is and how it differs from TDD
  • What a unit test really is
  • The different phases that compose a test
  • What test doubles are and the different kinds of test doubles that exist
  • The characteristics of a good test
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