Locators & Actions — quiz

A login form has `<button>Sign in</button>` with no test id and no stable class. Which locator is the most resilient and idiomatic in Playwright?

• page.locator('button.btn-primary')
• page.getByRole('button', { name: 'Sign in' })
• page.locator('xpath=//button[1]')
• page.locator('button:nth-child(2)')