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How do I create a basic test assertion using Playwright?

Answer

To create a basic test assertion with @playwright/test, use the expect function and choose a suitable matcher. For instance, if you want to check if a variable success is truthy, write:

expect(success).toBeTruthy();

This assertion throws an error if success is falsy.

For web-specific async matchers, use await with expect. To check if an element with test id 'status' has text 'Submitted', write:

await expect(page.getByTestId('status')).toHaveText('Submitted');

Playwright re-tests the element until the condition is met or a timeout occurs. The default timeout is 5 seconds, but you can configure it in your test configuration file or pass it directly when making assertions.

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Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.