KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use PageEmulateMediaAsync method of Microsoft.Playwright.Tests.PageEmulateMediaTests class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Tests.PageEmulateMediaTests.PageEmulateMediaAsync

PageEmulateMediaAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System.Threading.Tasks;3{4    {5        static async Task Main(string[] args)6        {7            using var playwright = await Playwright.CreateAsync();8            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions9            {10            });11            var context = await browser.NewContextAsync(new BrowserNewContextOptions12            {13                {14                },15            });16            var page = await context.NewPageAsync();17            await page.EmulateMediaAsync(new PageEmulateMediaOptions18            {19            });20        }21    }22}

PageEmulateMediaAsync

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System.Threading.Tasks;4using Xunit;5using Xunit.Abstractions;6{7    {8        public PageEmulateMediaTests(ITestOutputHelper output) : base(output)9        {10        }11        [Fact(Timeout = PlaywrightSharp.Playwright.DefaultTimeout)]12        public async Task PageShouldWorkWhenEmulatingPrintMedia()13        {14            await Page.SetContentAsync(@"15                @media print {16                  body {17                    background: green;18                  }19                }20            ");21            await Page.EmulateMediaAsync(new PageEmulateMediaOptions22            {23            });24            Assert.Equal("rgb(0, 128, 0)", await Page.EvaluateAsync<string>("window.getComputedStyle(document.body).backgroundColor"));25        }26    }27}28{29    {30        internal PageEmulateMediaTests(ITestOutputHelper output) : base(output)31        {32        }33        [Fact(Timeout = PlaywrightSharp.Playwright.DefaultTimeout)]34        public async Task PageShouldWorkWhenEmulatingPrintMedia()35        {36            await Page.SetContentAsync(@"37                @media print {38                  body {39                    background: green;40                  }41                }42            ");43            await Page.EmulateMediaAsync(new PageEmulateMediaOptions44            {45            });46            Assert.Equal("rgb(0, 128, 0)", await Page.EvaluateAsync<string>("window.getComputedStyle(document.body).backgroundColor"));47        }48    }49}

PageEmulateMediaAsync

Using AI Code Generation

1await Page.EmulateMediaAsync(Media.Print);2await Page.EmulateMediaAsync(Media.Screen);3await Page.EmulateMediaAsync(Media.Print);4await Page.EmulateMediaAsync(Media.Screen);5await Page.EmulateMediaAsync(Media.Screen);6await Page.EmulateMediaAsync(Media.Screen);7await Page.EmulateMediaAsync(Media.Screen);8await Page.EmulateMediaAsync(Media.Screen);9await Page.EmulateMediaAsync(Media.Screen);10await Page.EmulateMediaAsync(Media.Screen);11await Page.EmulateMediaAsync(Media.Screen);12await Page.EmulateMediaAsync(Media.Screen);13await Page.EmulateMediaAsync(Media.Screen);

PageEmulateMediaAsync

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using Microsoft.Playwright.Tests.Attributes;4using System.Threading.Tasks;5using Xunit;6using Xunit.Abstractions;7{8    [Trait("Category", "firefox")]9    {10        internal PageEmulateMediaTests(ITestOutputHelper output) : base(output)11        {12        }13        [Fact(Timeout = PlaywrightSharp.Playwright.DefaultTimeout)]14        public async Task ShouldWork()15        {16            await Page.EmulateMediaAsync(MediaType.None);17            Assert.False(await Page.EvaluateAsync<bool>("matchMedia('screen').matches"));18            Assert.False(await Page.EvaluateAsync<bool>("matchMedia('print').matches"));19            await Page.EmulateMediaAsync(MediaType.Screen);20            Assert.True(await Page.EvaluateAsync<bool>("matchMedia('screen').matches"));21            Assert.False(await Page.EvaluateAsync<bool>("matchMedia('print').matches"));22            await Page.EmulateMediaAsync(MediaType.Print);23            Assert.False(await Page.EvaluateAsync<bool>("matchMedia('screen').matches"));24            Assert.True(await Page.EvaluateAsync<bool>("matchMedia('print').matches"));25        }26    }27}

PageEmulateMediaAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using System.Collections.Generic;4using System.Linq;5using Microsoft.Playwright.Tests;6using Microsoft.Playwright.Tests.Attributes;7using Microsoft.Playwright.Tests.Helpers;8using Microsoft.Playwright.Tests.BaseTests;9using Microsoft.Playwright.Transport.Channels;10using Microsoft.Playwright.Transport.Protocol;11using Microsoft.Playwright.Transport;12using Microsoft.Playwright;13{14    {15        [Fact(Timeout=PlaywrightSharp.Playwright.DefaultTimeout)]16        public async Task PageEmulateMediaAsync()17        {18            await Page.EmulateMediaAsync(MediaFeature.PrefersColorSchemeLight);19            await Page.GotoAsync(Server.Prefix + "/css-media.html");20            Assert.Equal("light", await Page.EvaluateAsync<string>("() => matchMedia('(prefers-color-scheme: light)').matches"));21            Assert.Equal("dark", await Page.EvaluateAsync<string>("() => matchMedia('(prefers-color-scheme: dark)').matches"));22            await Page.EmulateMediaAsync(MediaFeature.PrefersColorSchemeDark);23            Assert.Equal("dark", await Page.EvaluateAsync<string>("() => matchMedia('(prefers-color-scheme: light)').matches"));24            Assert.Equal("light", await Page.EvaluateAsync<string>("() => matchMedia('(prefers-color-scheme: dark)').matches"));25        }26    }27}28{29    {30        internal async Task EmulateMediaAsync(MediaFeature mediaFeature)31        {32            await Page.EvaluateAsync($"() => matchMedia('(prefers-color-scheme: {mediaFeature})').addEventListener('change', window.__onMediaChanged)");33            await Page.EvaluateAsync($"() => matchMedia('(prefers-color-scheme: {media

PageEmulateMediaAsync

Using AI Code Generation

1    var page = await context.NewPageAsync();2    await page.EmulateMediaAsync(media);3    await page.GoToAsync(TestConstants.ServerUrl + "/css-media.html");4    await page.EvalOnSelectorAsync("css=div", "div => div.className");5}6    var page = await context.NewPageAsync();7    await page.EmulateMediaAsync(media);8    await page.GoToAsync(TestConstants.ServerUrl + "/css-media.html");9    await page.EvalOnSelectorAsync("css=div", "div => div.className");10}11    var page = await context.NewPageAsync();12    await page.EmulateMediaAsync(media);13    await page.GoToAsync(TestConstants.ServerUrl + "/css-media.html");14    await page.EvalOnSelectorAsync("css=div", "div => div.className");15}16    var page = await context.NewPageAsync();17    await page.EmulateMediaAsync(media);18    await page.GoToAsync(TestConstants.ServerUrl + "/css-media.html");19    await page.EvalOnSelectorAsync("css=div", "div => div.className");20}

PageEmulateMediaAsync

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Playwright;7using Microsoft.Playwright.Tests;8using NUnit.Framework;9using NUnit.Framework.Internal;10{11    [Parallelizable(ParallelScope.Self)]12    {13        [PlaywrightTest("page-emulate-media.spec.ts", "should work")]14        [Test, Timeout(TestConstants.DefaultTestTimeout)]15        public async Task ShouldWork()16        {17            await Page.EmulateMediaAsync(null);18            Assert.AreEqual("screen", await Page.EvaluateAsync<string>("window.matchMedia('screen').matches"));19            Assert.AreEqual("screen", await Page.EvaluateAsync<string>("window.matchMedia('print').matches"));20            await Page.EmulateMediaAsync("print");21            Assert.AreEqual("print", await Page.EvaluateAsync<string>("window.matchMedia('screen').matches"));22            Assert.AreEqual("print", await Page.EvaluateAsync<string>("window.matchMedia('print').matches"));23            await Page.EmulateMediaAsync(null);24            Assert.AreEqual("screen", await Page.EvaluateAsync<string>("window.matchMedia('screen').matches"));25            Assert.AreEqual("screen", await Page.EvaluateAsync<string>("window.matchMedia('print').matches"));26        }27        [PlaywrightTest("page-emulate-media.spec.ts", "should work with colorScheme")]28        [Test, Timeout(TestConstants.DefaultTestTimeout)]29        public async Task ShouldWorkWithColorScheme()30        {31            await Page.EmulateMediaAsync(null);32            Assert.AreEqual("light", await Page.EvaluateAsync<string>("window.matchMedia('(prefers-color-scheme: light)').matches"));33            Assert.AreEqual("dark", await Page.EvaluateAsync<string>("window.matchMedia('(prefers-color-scheme: dark)').matches"));34            await Page.EmulateMediaAsync(null, "dark");35            Assert.AreEqual("dark", await Page.EvaluateAsync<string>("window.matchMedia('(prefers-color-s

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.