Cypress Visual Regression Testing

Cypress Visual Regression Testing is a type of testing that compares the visual appearance of a web page before and after a code change to ensure that there are no unintended changes in the user interface. It uses screenshot comparison techniques to detect visual changes and provide a visual report of any differences.

Quality With Excellence

2. Add the following configuration to your Cypress cypress.json file:

"viewportWidth": 1200, "viewportHeight": 800, "retries": { "runMode": 2, "openMode": 0

"testFiles": "**/*.spec.js",

"ignoreTestFiles": "**/examples/*.spec.js"

3. Create a new test file and add the following code to take a screenshot of a web page:

describe('Visual Regression Tests', () =>

it('should take a screenshot of the home page', () =>

cy.visit('/') cy.screenshot("home page");

4. Run the test using the following command:

npx cypress run --headless --browser chrome

5. View the visual report in the 'cypress/screenshots' folder.

In this example, Cypress takes a screenshot of the home page first saves on the location specified and compares it to the latest screenshot after the script executes again to detect any visual changes.

The cypress-image-snapshot plugin is used to handle the screenshot comparison and generate the visual report.

Visual regression testing is particularly useful for testing web applications with a large number of visual elements and complex layouts.

By detecting and preventing unintended visual changes, it helps to ensure a consistent and high-quality user experience.