cypress-eslint-preprocessor

Cypress plugin that will run linting via ESLint on your spec files and display linting errors in the console.

This uses the file:preprocessor event which means it will lint files as they are loaded by Cypress. If you are running your full suite of tests, all the spec files will be linted, but if you are only running tests on a specific test suite then only the files that it loads will be linted.

This will use the .eslintrc file in your project root combined with the .eslintrc file in your Cypress directory (if you have one). This means you can easily set custom rules just for your Cypress spec files.

After linting has been run, it will call the default Cypress browserify preprocessor on the file, you can override this by passing in another preprocessor.

Example

Install

# npm
npm install cypress-eslint-preprocessor --save-dev

# yarn
yarn add cypress-eslint-preprocessor --dev

Usage

If you are not currently using another plugin on the file:preprocessor event

// cypress/plugins/index.js

const cypressEslint = require('cypress-eslint-preprocessor');

module.exports = (on) => {
    on('file:preprocessor', cypressEslint());
};

If you are using another plugin on the file:preprocessor event, pass this in as a parameter to cypress eslint

// cypress/plugins/index.js

const cypressEslint = require('cypress-eslint-preprocessor');
const cypressBabelEsX = require('cypress-babel-esx-preprocessor');

module.exports = (on) => {
    on('file:preprocessor', cypressEslint(cypressBabelEsX()));
};