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boundaries-demo's Introduction

Clean Code, Chapter 8: Boundaries

This project is meant to demonstrate some concepts from Chapter 8 of Clean Code. You can view the demo app here: http://tylerhawkins.info/boundaries-demo/build/

Key Concepts

Wrap third-party code in a thin layer of abstraction. This allows you to:

  1. Create your own interface
  2. More easily mock the third-party library in your code
  3. Easily adapt to changes in the third-party library's API
  4. Swap out underlying libraries if you want to change libraries in the future

Write "learning tests" to document a third-party library. This allows you to:

  1. Document how you intend to use the library
  2. Easily catch breaking changes in the library when you upgrade dependencies

Use mock data when the code you're integrating with doesn't exist yet. This allows you to:

  1. Not be blocked if you're a frontend developer waiting on a backend developer to create the backend API

Running the App Locally

  1. yarn install
  2. yarn start
  3. Navigate to http://localhost:3000/ in your browser

Resources

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