Visual UI testing is a method of taking screenshots, comparing these to baseline images and triggering an error when there's a difference detected.
UI testing can be used as part of your test suite in your CI/CD environment, next to functional tests, unit tests and more.
There are several advantages to using Visual Comparison Testing. Below are the most popular advantages.
These tests are done automatically, which means they can be repeated whenever you want and how many times you like. In combination with a CI/CD system, this is much more efficient than going through every UI change manually.
A pixel comparison algorithm will detect the slightest UI change. Compared with a human tester, the algorithm will detect changes faster and more efficient.
Because this is an automated verification, you can choose to run the algorithm in parallel on a wide variety of configurations. You can choose to run the checks on different viewport sizes, screen resolutions, operating systems, browsers and (mobile) devices.
Angular Visual Regression Testing with Cypress
Cypress is a popular test framework, used by developers and QA to write tests in clear syntax.
With the power of plugins, Cypress can be extended with various enhancements to improve your test suite.