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Svelte with Test-Driven Development

You're reading from   Svelte with Test-Driven Development Advance your skills and write effective automated tests with Vitest, Playwright, and Cucumber.js

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Product type Paperback
Published in Jun 2023
Publisher Packt
ISBN-13 9781837638338
Length 250 pages
Edition 1st Edition
Languages
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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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Table of Contents (22) Chapters Close

Preface 1. Part 1: Learning the TDD Cycle
2. Chapter 1: Setting up for Testing FREE CHAPTER 3. Chapter 2: Introducing the Red-Green-Refactor Workflow 4. Chapter 3: Loading Data into a Route 5. Chapter 4: Saving Form Data 6. Chapter 5: Validating Form Data 7. Chapter 6: Editing Form Data 8. Part 2: Refactoring Tests and Application Code
9. Chapter 7: Tidying up Test Suites 10. Chapter 8: Creating Matchers to Simplify Tests 11. Chapter 9: Extracting Logic Out of the Framework 12. Chapter 10: Test-Driving API Endpoints 13. Chapter 11: Replacing Behavior with a Side-By-Side Implementation 14. Chapter 12: Using Component Mocks to Clarify Tests 15. Chapter 13: Adding Cucumber Tests 16. Part 3: Testing SvelteKit Features
17. Chapter 14: Testing Authentication 18. Chapter 15: Test-Driving Svelte Stores 19. Chapter 16: Test-Driving Service Workers 20. Index 21. Other Books You May Enjoy

Loading Data into a Route

SvelteKit is very much about routing: figuring out what to display once your browser requests a page at a specific location. For example, the /birthdays route that we’ll work on in this chapter. Part of that routing is ensuring that the route has the data available to it. In this chapter, you’ll see how you can test-drive SvelteKit’s load function for pulling that data into a component.

You’ll also see how Playwright can be used to build an end-to-end test that proves all the various components of this system.

This chapter covers the following:

  • Using Playwright to specify end-to-end behavior
  • Deciding an approach to make the end-to-end test pass
  • Test-driving the load function
  • Test-driving the page component

By the end of the chapter, you’ll have test-driven a functioning SvelteKit route that you can view in your web browser, and you’ll have learned the key differences between Playwright...

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