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- Hello again, and
welcome to lesson seven.

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This lesson describes how

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to apply test-driven development
techniques effectively

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when you're testing JavaScript code.

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We'll explain the core
concepts of TDD first,

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and we'll walk through an example

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of how to do a TDD in
practice in JavaScript.

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Then we'll see how to
refactor JavaScript code

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as we go along, which is an
important ingredient in TDD.

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We wrap up the lesson

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by discussing various
additional techniques

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and best practices

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for writing high-quality
tests in JavaScript.