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End-to-End Web Testing with Cypress

You're reading from   End-to-End Web Testing with Cypress Explore techniques for automated frontend web testing with Cypress and JavaScript

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Product type Paperback
Published in Jan 2021
Publisher Packt
ISBN-13 9781839213854
Length 240 pages
Edition 1st Edition
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Author (1):
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Waweru Mwaura Waweru Mwaura
Author Profile Icon Waweru Mwaura
Waweru Mwaura
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Table of Contents (17) Chapters Close

Preface 1. Section 1: Cypress as an End-to-End Testing Solution for Frontend Applications
2. Chapter 1: Installing and Setting Up Cypress FREE CHAPTER 3. Chapter 2: Differences between Selenium WebDriver and Cypress 4. Chapter 3: Working with Cypress Command-Line Tools 5. Chapter 4: Writing Your First Test 6. Chapter 5: Debugging Cypress Tests 7. Section 2: Automated Tests with the TDD Approach
8. Chapter 6: Writing Cypress Tests Using the TDD approach 9. Chapter 7: Understanding Element Interaction in Cypress 10. Chapter 8: Understanding Variables and Aliases in Cypress 11. Chapter 9: Advanced Uses of Cypress Test Runner 12. Section 3: Automated Testing for Your Web Application
13. Chapter 10: Exercise – Navigation and Network Requests 14. Chapter 11: Exercise – Stubbing and Spying XHR Requests 15. Chapter 12: Visual Testing in Cypress 16. Other Books You May Enjoy

Cypress assertions

As we learned in the previous section, when writing our first test, assertions exist to describe the desired state of the application. Assertions in Cypress behave like guards to the tests in that they validate that the desired state and the present state are the same. Cypress assertions are unique as they are retried when Cypress commands are running until a timeout is reached or until an element is found.

Cypress assertions originate from the chai, chai-jquery and sinon-chai modules, which come bundled with the Cypress installation. Cypress also allows you to write custom assertions using the Chai plugins. However, in this section, we will focus on the default assertions that come bundled with Cypress, and not on the custom assertions that can be extended as plugins.

We can write Cypress assertions in two ways: either by explicitly defining subjects or by implicitly defining subjects. Cypress recommends implicitly defining subjects in assertions as they are...

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