[Question] Best way to use playwright in parallel?

Hi there!

I have an electron app that is doing a browser automation (navigation, form population, saving files, etc). The user can add a various of scripts in the “script store” and they will run in parallel.

Currently I am using mocha because it has parallel mode (since 8 version) and I am more familiar with it. I have a function like this:

function runMochaTest(pathToScript, reportFileName, callback) {
  const mocha = new Mocha({
    parallel: true,
    reporter: "xunit",
    reporterOptions: {
      output: `${exeDirectory}/../reports/${reportFileName}.xml`
    },
  });

  mocha.addFile(pathToScript);

  mocha.run(() => {
    callback();
  });
}

And a typical script is look like this:

const data = require('./somedata.json');

describe("parallel playwright execution via mocha 8.0", async function () {
  data.forEach(async function (product) {
    it(`parsing data for ${product}`, async function () {
      this.timeout(120000);
      const browser = await chromium.launch();
      const context = await browser.newContext({
        ignoreHTTPSErrors: true,
        viewport: null,
        httpCredentials: {
          username: credentials.username,
          password: credentials.password,
        },
      });

      const page = await context.newPage();
      await page.goto("http://website.com", { waitUntil: "load"});

     //... some data related stuff 

      await browser.close();
    });
  });
});

So far everything is working, but since I don’t need any mocha features beside the parallel execution and xml report, I want to explore other alternatives to what I am doing now.

So, my question is: What are the “best practices” to execute playwright in parallel? Are you using something like jest or other test runners?

[nicoandmee]

Check out: https://github.com/agaricide/puppeteer-functional-patterns (although it is for puppeteer, still directly applicable)

[aslushnikov]

@MihailPertsev one other option to run Playwright in parallel would be our very own playwright-test which is in preview.