##### playwright.断言 - `expect()` - `expect(response)` - [[class APIResponseAssertions]] API响应断言 - `expect(locator)` - [[class LocatorAssertions]] 定位器断言 - `expect(page)` - [[class PageAssertions]] 页面断言 ```python from playwright.sync_api import expect locator = page.locator('.my-element') expect(locator).to_be_visible() # 期望可见 ```