What are the recommended strategies for parallel test execution with Playwright?

Product Support
,
#1

What are the recommended strategies for parallel test execution with Playwright?

#2

Hey Mark

Achieving parallel test execution in Playwright is crucial for optimizing test suite performance. One highly recommended approach is to leverage test runners that inherently support parallelism, such as Jest or Playwright Test.

  1. Jest Parallel Execution: Jest is a popular JavaScript testing framework that provides excellent support for parallel test execution. You can run multiple test files concurrently, improving overall test suite execution time. To set up Jest with Playwright, you’ll need to install the necessary packages:

    npm install --save-dev jest playwright

    Configure Jest in your package.json or through a separate configuration file, and then run your tests using the --runInBand option to enable parallel execution:

    npx jest --runInBand=false

    Jest will automatically parallelize the test execution for you.

  2. Playwright Test: Playwright Test is a testing library specifically designed for Playwright. It offers built-in parallelism, making it a seamless choice for parallel test execution. With Playwright Test, you can write tests in a straightforward manner and execute them concurrently.

    Here’s a simple example of using Playwright Test:

    const { test, expect } = require('@playwright/test');

test('example test', async ({ page }) => {
  await page.goto('https://example.com');
  expect(await page.title()).toBe('Example Domain');
});

    Run tests in parallel using the following command:

    npx folio --param parallel=3

    Adjust the parallel parameter based on your infrastructure capabilities.

These test runners streamline parallel execution, significantly reducing the time required to run your entire test suite. Additionally, they often provide features like test isolation, efficient resource management, and clear reporting.

If you have any more questions or if there’s something specific you’d like assistance with, feel free to let us know. We are here to make your testing easy :blush: