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Speeding Up Test Execution in Playwright

Running a large number of tests quickly is possible with Playwright. Here's how you can do it.

Sharding Your Tests

Sharding is a technique where you split your test suite into smaller parts and run them on different machines. This way, you can distribute the load and reduce the time it takes to run all your tests. Here's how you can shard your tests in Playwright:

// Run the first shard
npx playwright test --shard=1/3

// Run the second shard
npx playwright test --shard=2/3

// Run the third shard
npx playwright test --shard=3/3

Using Soft Assertions

Soft assertions are a great way to improve productivity. Unlike hard assertions, they don't terminate the test execution when a check fails. Instead, they compile a list of failed assertions and display them once the test ends.

Utilizing UI Mode

UI mode provides a better developer experience with features like time travel debugging and watch mode. You can run your tests in UI mode like this:

npx playwright test --ui

Leveraging HTML Reporter

Playwright's HTML Reporter shows a full report of your tests, making it easy to filter them by browsers, status, and more. It's a handy tool for developers and testers who need quick access to test results.

By sharding your tests, using soft assertions and UI mode, and leveraging the HTML Reporter, you can run your tests faster while maintaining high quality standards. For more tips on efficient testing with Playwright, check out this blog post.