salix/e2e/helpers/nightmare.js

const Nightmare = require('nightmare');
let nightmare;

module.exports = function createNightmare(width = 1280, height = 720) {
    if (nightmare)
        return nightmare;

    nightmare = new Nightmare({
        show: process.env.E2E_SHOW,
        typeInterval: 10,
        x: 0,
        y: 0,
        waitTimeout: 2000
    }).viewport(width, height);

    nightmare.on('console', (type, message, ...args) => {
        if (type === 'error')
            throw new Error(message);
        else
            console[type](message, ...args);
    });

    nightmare.header('Accept-Language', 'en');
    return nightmare;
};