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

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The "Trees" 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:

Diagramming the functionality in tree-form will help break down tasks into smaller units. These smaller units, or leaf nodes, are pure functions that can be easily tested. Mocks can be built to supply these leaf nodes with test data.

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