All browsers in parallel

[mmarkelov]

Thinking about #19
Try to find out simple way to do it. Get inspired by qawolf and qawolf/qawolf#352
Just add helper script to run tests for all browsers in parallel, I could also add script for running it one by one. But I'm not sure that it is very convenient and easy way.
So you should run this script like so:

"test:all-browsers": "node node_modules/jest-playwright-preset/lib/parallel.js"

And you will get something like this:

So what do you think about it?

[mmarkelov]

As a workaround we can use bin:

"bin": {
    "jest-playwright": "./lib/bin/index.js"
  },

bin/index.js:

#!/usr/bin/env node

import { spawnSync } from 'child_process'
const [,, ...args] = process.argv

if (args[0] === '--parallel') {
    const exec = (browser = 'chromium') => {
        spawnSync('node', ['node_modules/.bin/jest'], {
            stdio: 'inherit',
            shell: true,
            env: {
                ...process.env,
                BROWSER: browser,
            },
        })
    }
    exec()
    exec('firefox')
    exec('webkit')
}

Also we could add another option to run it one by one.

And then we can use it like so:

"test:browsers": "jest-playwright --parallel"