Testing / Playwright Interview questions

What are assertions in Playwright?

Assertions verify that the application is in an expected state, and Playwright provides two kinds. Web-first assertions, written as expect(locator)..., automatically retry until the condition becomes true or a timeout is reached, which matches how real UIs update asynchronously.

await expect(page.getByRole('alert')).toBeVisible();
await expect(page.getByTestId('count')).toHaveText('3');

Common matchers include toBeVisible(), toBeEnabled(), toHaveText(), toHaveValue(), and toHaveCount(). Generic value assertions like expect(value).toBe(3) also exist for comparing plain JavaScript values, but these check once and don't retry, so they're meant for values that are already settled rather than UI state that's still updating.

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A web-first assertion such as toBeVisible() will: Check once and fail immediately if not true

✗ Try again if not.

Retry automatically until true or timeout

✓ Correct! Well done.

Only work outside of Playwright Test

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expect(value).toBe(3) on a plain JavaScript value: Retries the same as a web-first assertion

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Checks once, with no retrying

✓ Correct! Well done.

Requires a locator as input

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How do you take a screenshot in Playwright? How do you handle iframes in Playwright? How do you use the page.goto() method? What is a fixture in Playwright? What are assertions in Playwright? What is the difference between page.click() and locator().click()? What are the supported programming languages in Playwright? What are locators in Playwright? Describe the Playwright Inspector? List the different types of locators in Playwright? What is the Trace Viewer in Playwright? How do you use codegen in Playwright? What is the difference between Playwright and Selenium? How does Playwright handle multiple tabs and windows? What is Playwright? What are the supported browsers in Playwright? How do you install Playwright? What is the purpose of the Playwright Test Runner? Define auto-waiting in Playwright? What is the difference between expect().toBeVisible() and isVisible()?

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