Cypress Lighthouse Plugin

Cypress Lighthouse Plugin is a lighthouse plugin that adds the cy.lighthouse command to audit websites against the lighthouse performance metrics.

Installation

Use npm or yarn to install cypress-lighthouse

npm install cypress-lighthouse

yarn add cypress-lighthouse

Import the commands at the top of your test file.

import 'cypress-lighthouse';

API

Syntax

.lighthouse(url)

Usage

describe('Performance Metrics for https://google.com', () => {
  before(function () {
    cy.lighthouse('https://google.com').as('results')
  });
  it('Meets performance benchmarks', function () {
    // Assert that the performance metric is greater than .85
    cy.wrap(this.results.performance).should('be.gt', .85);
  })
});

Arguments

url (string)
Any valid URL.

Yields

A chaining component with the results of the lighthouse audit. Example:

{
  "performance": 0.16, 
  "accessibility": 0.72, 
  "best-practices": 0.79, 
  "seo": 0.92, 
  "pwa": 0.3
}

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT