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How to use verify_viewport method in Playwright Python

Best Python code snippet using playwright-python

test_browsercontext.py

Source:test_browsercontext.py

...70    assert browser.contexts == []71async def test_page_event_should_propagate_default_viewport_to_the_page(browser, utils):72    context = await browser.new_context(viewport={"width": 456, "height": 789})73    page = await context.new_page()74    await utils.verify_viewport(page, 456, 789)75    await context.close()76async def test_page_event_should_respect_device_scale_factor(browser):77    context = await browser.new_context(device_scale_factor=3)78    page = await context.new_page()79    assert await page.evaluate("window.devicePixelRatio") == 380    await context.close()81async def test_page_event_should_not_allow_device_scale_factor_with_null_viewport(82    browser,83):84    with pytest.raises(Error) as exc_info:85        await browser.new_context(no_viewport=True, device_scale_factor=1)86    assert (87        exc_info.value.message88        == '"deviceScaleFactor" option is not supported with null "viewport"'...

test_defaultbrowsercontext.py

Source:test_defaultbrowsercontext.py

...127    else:128        assert cookies == []129async def test_should_support_viewport_option(launch_persistent, utils):130    (page, context) = await launch_persistent(viewport={"width": 456, "height": 789})131    await utils.verify_viewport(page, 456, 789)132    page2 = await context.new_page()133    await utils.verify_viewport(page2, 456, 789)134async def test_should_support_device_scale_factor_option(launch_persistent, utils):135    (page, context) = await launch_persistent(device_scale_factor=3)136    assert await page.evaluate("window.devicePixelRatio") == 3137async def test_should_support_user_agent_option(launch_persistent, server):138    (page, context) = await launch_persistent(user_agent="foobar")139    assert await page.evaluate("() => navigator.userAgent") == "foobar"140    [request, _] = await asyncio.gather(141        server.wait_for_request("/empty.html"),142        page.goto(server.EMPTY_PAGE),143    )144    assert request.getHeader("user-agent") == "foobar"145async def test_should_support_bypass_csp_option(launch_persistent, server):146    (page, context) = await launch_persistent(bypass_csp=True)147    await page.goto(server.PREFIX + "/csp.html")...

utils.py

Source:utils.py

...50        )51        for child in sorted_frames:52            result = result + utils.dump_frames(child, "    " + indentation)53        return result54    def verify_viewport(self, page: Page, width: int, height: int):55        assert cast(ViewportSize, page.viewport_size)["width"] == width56        assert cast(ViewportSize, page.viewport_size)["height"] == height57        assert page.evaluate("window.innerWidth") == width58        assert page.evaluate("window.innerHeight") == height59    def register_selector_engine(self, selectors: Selectors, *args, **kwargs) -> None:60        try:61            selectors.register(*args, **kwargs)62        except Error as exc:63            if "has been already registered" not in exc.message:64                raise exc...

Playwright tutorial

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