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React Anti-Patterns

You're reading from   React Anti-Patterns Build efficient and maintainable React applications with test-driven development and refactoring

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Product type Paperback
Published in Jan 2024
Publisher Packt
ISBN-13 9781805123972
Length 324 pages
Edition 1st Edition
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Author (1):
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Juntao Qiu Juntao Qiu
Author Profile Icon Juntao Qiu
Juntao Qiu
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Table of Contents (20) Chapters Close

Preface 1. Part 1:Introducing the Fundamentals FREE CHAPTER
2. Chapter 1: Introducing React Anti-Patterns 3. Chapter 2: Understanding React Essentials 4. Chapter 3: Organizing Your React Application 5. Chapter 4: Designing Your React Components 6. Part 2: Embracing Testing Techniques
7. Chapter 5: Testing in React 8. Chapter 6: Exploring Common Refactoring Techniques 9. Chapter 7: Introducing Test-Driven Development with React 10. Part 3: Unveiling Business Logic and Design Patterns
11. Chapter 8: Exploring Data Management in React 12. Chapter 9: Applying Design Principles in React 13. Chapter 10: Diving Deep into Composition Patterns 14. Part 4: Engaging in Practical Implementation
15. Chapter 11: Introducing Layered Architecture in React 16. Chapter 12: Implementing an End-To-End Project 17. Chapter 13: Recapping Anti-Pattern Principles 18. Index 19. Other Book You May Enjoy

Implementing the menu list

Even a basic menu list featuring just the names of pizzas can be valuable for customers who are looking to browse and decide what to eat. While The Code Oven may not be set up for online ordering yet, it serves as a useful starting point.

Looking at the second task on our list, we can write our second test like so:

it("renders menu list", () => {
  render(<PizzaShopApp />);
  const menuList = screen.getByRole('list');
  const menuItems = within(menuList).getAllByRole('listitem');
  expect(menuItems.length).toEqual(8);
});

This test starts by rendering the component. Then, it identifies the HTML element tagged with the list role from the rendered component. Using the within function, it narrows down the search to only that list and locates all items within it tagged with listitem. Finally, it asserts that the number of such items should be equal to 8 (the number of items...

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