Setting a cookie with WebDriverJS with parallel flows.

webdriverjs_parallel_flows.js

'use strict';

/**
 * Module dependencies.
 */
const webdriver = require('selenium-webdriver');

/**
 * Run clients in parallel and set cookie.
 * https://github.com/SeleniumHQ/selenium/blob/master/javascript/node/selenium-webdriver/example/parallel_flows.js
 */
for (let index = 0; index < 5; index++) {
    const flow = new webdriver.promise.ControlFlow();
    flow.on('uncaughtException', (error) => {
        console.error(index, 'uncaughtException in flow', error);
    });

    const builder = new webdriver.Builder();
    const driver = builder.forBrowser('phantomjs')
        .setControlFlow(flow)
        .build();

    driver.get(`https://httpbin.org/cookies/set?index=${index}`);
    driver.getTitle().then((title) => {
        console.log(index, title);
    });
    driver.manage().getCookies().then((cookies) => {
        console.log(index, cookies)
    });
    driver.quit();
}