Book Image

End-to-End Web Testing with Cypress

By : Waweru Mwaura
1 (1)
Book Image

End-to-End Web Testing with Cypress

1 (1)
By: Waweru Mwaura

Overview of this book

Cypress is a modern test automation framework for web-based frontend apps. Learning Cypress will help you overcome the shortcomings of conventional testing solutions such as dependency graph problems, the steep learning curve in setting up end-to-end testing packages, and difficulties in writing explicit time waits for your tests. In End-to-End Web Testing with Cypress, you’ll learn how to use different Cypress tools, including time travel, snapshots, errors, and console output, to write fail-safe and non-flaky tests. You’ll discover techniques for performing test-driven development (TDD) with Cypress and write cross-browser tests for your web applications. As you advance, you’ll implement tests for a sample application and work with a variety of tools and features within the Cypress ecosystem. Finally, this Cypress book will help you grasp advanced testing concepts such as visual testing and networking. By the end of this book, you’ll have the skills you need to be able to set up Cypress for any web app and understand how to use it to its full potential.
Table of Contents (17 chapters)
1
Section 1: Cypress as an End-to-End Testing Solution for Frontend Applications
7
Section 2: Automated Tests with the TDD Approach
12
Section 3: Automated Testing for Your Web Application

Understanding test snapshots

We briefly covered the concept of snapshots when we explained the time travel process in Cypress. However, this does not mean we have exhausted the advantages of the Snapshots feature.

Snapshots are powerful as they give us a sneak peek into how the test executes and into the steps that it took, which either lead to a failure state or to a success state in the test. When we pin DOM snapshots, Cypress freezes the test and highlights all the actions that were taken. The pinned snapshots allow us to inspect the state of the DOM, while at the same time view all the events that took place in that particular step. In the preceding screenshot, for example, in step 2, there's an event hitbox that shows that the first todo item was clicked. The following screenshot shows how Cypress interprets events that take place as a test is running:

Figure 5.4 – An event hitbox for a toggled todo item

The preceding screenshot shows the...