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About the Book

How should we decide what kinds of tests to write for our React applications, and how many of each kind? How can we write a test suite that gives us confidence rather than just giving us busywork? Instead of tests slowing down our development, could they actually help us go faster?

Outside-In React Development tackles these questions by applying the practice of outside-in test-driven development (TDD) to React applications. It explains the problems that agile software development solves, the key role that test-driven development plays, and the way outside-in test-driven development helps end-to-end tests and unit tests to work together.

The main part of the book is an extended exercise building a React front-end application from scratch using outside-in TDD. You'll learn:

  • How and why to get your app tested on CI and automatically deploying before the first feature is written
  • How to use the two-level TDD loop to stay laser-focused on building out one user-deliverable feature to completion
  • How to write tests that provide maximum safety with minimum ongoing cost by testing the interface instead of the implementation
  • How to get thorough coverage of edge cases while keeping your test suite fast

About the Author

Josh Justice’s avatar Josh Justice

Josh has worked as a professional developer since 2004 across backend, frontend, and native mobile platforms. Josh values creating maintainable systems via testing, refactoring, and evolutionary design, and helping others learn to do the same. He currently serves as the Web Platform Lead at Big Nerd Ranch, a web and mobile development shop in Atlanta, Georgia.

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