MochaChaiSelenium.ts

import { Builder, Capabilities, By, until, ThenableWebDriver } from 'selenium-webdriver';
import { expect, should } from 'chai';
should(); // this inits the chai should above up. for some reason
import { chaiWebDriver } from 'chai-webdriver';
import { spawn } from 'cross-spawn-async';
import 'mocha';

let iisPath = "C:\\Program Files (x86)\\IIS Express\\iisexpress.exe";

var webserver;
var webbrowser : ThenableWebDriver;

let webserverurlbase = "http://localhost:52322/"; // comes from debug port settings

describe("Test Base", () => {
    before(async () => {
        webserver = spawn(iisPath, ['/path:C:\\work\\xxx\\yyy\\', '/port:52322']); // points to asp.net 4.x project to launch
        var chromeCapabilities = Capabilities.chrome();
        var chromeOpts = { "args": ["--log-level=3"] }; // turn off any chromedriver messages
        chromeCapabilities.set('chromeOptions', chromeOpts);
        webbrowser = new Builder().withCapabilities(chromeCapabilities).build();
    });

    after(() => {       
        spawn("taskkill", ["/pid", webserver.pid, '/f', '/t']); //this nice code that kills the iisexpress server, dead (on Windows of course)
        webbrowser.quit();
    });

    it('should be redirected OK', async () => {
        await webbrowser.get(webserverurlbase);
        const title = await webbrowser.getTitle();
        title.should.equal("xxx");
    });

    it('should be login OK', async () => {
        await webbrowser.get(webserverurlbase);
        const title = await webbrowser.getTitle();
        title.should.equal("xxx");
    });
});

a part of package.json

.... "dependencies": { "@types/es6-promise": "^3.3.0", "@types/es6-shim": "^0.31.37", "@types/selenium-webdriver": "^3.0.8", "chromedriver": "^2.38.3", "selenium": "^2.20.0", "selenium-webdriver": "^4.0.0-alpha.1" }, "devDependencies": { "@types/chai": "^4.1.3", "@types/mocha": "^5.2.0", "chai": "^4.1.2", "chai-webdriver": "^1.2.0", "chrome-driver-standalone": "^2.37.0", "cross-spawn-async": "^2.2.5", "mocha": "^5.2.0", "ts-node": "^6.0.5", "typescript": "^2.9.1" }, "scripts": { "test": "mocha --require ts-node/register --lib ['es6'] --strict false ./test/*.spec.ts" },