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Mastering React Test-Driven Development

You're reading from   Mastering React Test-Driven Development Build simple and maintainable web apps with React, Redux, and GraphQL

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Product type Paperback
Published in Sep 2022
Publisher Packt
ISBN-13 9781803247120
Length 564 pages
Edition 2nd Edition
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Author (1):
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Daniel Irvine Daniel Irvine
Author Profile Icon Daniel Irvine
Daniel Irvine
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Toc

Table of Contents (26) Chapters Close

Preface 1. Part 1 – Exploring the TDD Workflow
2. Chapter 1: First Steps with Test-Driven Development FREE CHAPTER 3. Chapter 2: Rendering Lists and Detail Views 4. Chapter 3: Refactoring the Test Suite 5. Chapter 4: Test-Driving Data Input 6. Chapter 5: Adding Complex Form Interactions 7. Chapter 6: Exploring Test Doubles 8. Chapter 7: Testing useEffect and Mocking Components 9. Chapter 8: Building an Application Component 10. Part 2 – Building Application Features
11. Chapter 9: Form Validation 12. Chapter 10: Filtering and Searching Data 13. Chapter 11: Test-Driving React Router 14. Chapter 12: Test-Driving Redux 15. Chapter 13: Test-Driving GraphQL 16. Part 3 – Interactivity
17. Chapter 14: Building a Logo Interpreter 18. Chapter 15: Adding Animation 19. Chapter 16: Working with WebSockets 20. Part 4 – Behavior-Driven Development with Cucumber
21. Chapter 17: Writing Your First Cucumber Test 22. Chapter 18: Adding Features Guided by Cucumber Tests 23. Chapter 19: Understanding TDD in the Wider Testing Landscape 24. Index 25. Other Books You May Enjoy

Designing animation

As you read through this section, you may wish to open src/Drawing.js and read the existing code to understand what it’s doing.

The current Drawing component shows a static snapshot of how the drawing looks at this point. It renders a set of Scalable Vector Graphics (SVG) lines to represent the path the turtle has taken to this point, and a triangle to represent the turtle.

The component makes use of two child components:

  • The Turtle component is displayed once and draws an SVG triangle at the given location
  • The StaticLines component is a set of SVG lines that are drawn onscreen to represent the drawn commands

We will add a new AnimatedLine component that represents the current line being animated. As lines complete their animation, they will move into the StaticLines collection.

We’ll need to do some work to convert this from a static view to an animated representation.

As it stands, the component takes a turtle prop...

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