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How to use PageAddStyleTagTests class of Microsoft.Playwright.Tests package

Best Playwright-dotnet code snippet using Microsoft.Playwright.Tests.PageAddStyleTagTests

PageAddStyleTagTests.cs

Source:PageAddStyleTagTests.cs

...25using Microsoft.Playwright.NUnit;26using NUnit.Framework;27namespace Microsoft.Playwright.Tests28{29    public class PageAddStyleTagTests : PageTestEx30    {31        [PlaywrightTest("page-add-style-tag.spec.ts", "should work with a url")]32        public async Task ShouldWorkWithAUrl()33        {34            await Page.GotoAsync(Server.EmptyPage);35            var styleHandle = await Page.AddStyleTagAsync(new() { Url = "/injectedstyle.css" });36            Assert.NotNull(styleHandle);37            Assert.AreEqual("rgb(255, 0, 0)", await Page.EvaluateAsync<string>("window.getComputedStyle(document.querySelector('body')).getPropertyValue('background-color')"));38        }39        [PlaywrightTest("page-add-style-tag.spec.ts", "should throw an error if loading from url fail")]40        public async Task ShouldThrowAnErrorIfLoadingFromUrlFail()41        {42            await Page.GotoAsync(Server.EmptyPage);43            await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() =>...

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System;4using System.Threading.Tasks;5{6    static async Task Main(string[] args)7    {8        using var playwright = await Playwright.CreateAsync();9        await using var browser = await playwright.Chromium.LaunchAsync();10        var page = await browser.NewPageAsync();11        await PageAddStyleTagTests.AddStyleTagAsync(page);12    }13}14using Microsoft.Playwright;15using Microsoft.Playwright.Tests;16using System;17using System.Threading.Tasks;18{19    static async Task Main(string[] args)20    {21        using var playwright = await Playwright.CreateAsync();22        await using var browser = await playwright.Chromium.LaunchAsync();23        var page = await browser.NewPageAsync();24        await PageAddStyleTagTests.AddStyleTagWithContentAsync(page);25    }26}27using Microsoft.Playwright;28using Microsoft.Playwright.Tests;29using System;30using System.Threading.Tasks;31{32    static async Task Main(string[] args)33    {34        using var playwright = await Playwright.CreateAsync();35        await using var browser = await playwright.Chromium.LaunchAsync();36        var page = await browser.NewPageAsync();37        await PageAddStyleTagTests.AddMultipleStyleTagsAsync(page);38    }39}40using Microsoft.Playwright;41using Microsoft.Playwright.Tests;42using System;43using System.Threading.Tasks;44{45    static async Task Main(string[] args)46    {47        using var playwright = await Playwright.CreateAsync();48        await using var browser = await playwright.Chromium.LaunchAsync();49        var page = await browser.NewPageAsync();50        await PageAddStyleTagTests.AddStyleTagWithMediaAsync(page);51    }52}53using Microsoft.Playwright;54using Microsoft.Playwright.Tests;55using System;56using System.Threading.Tasks;57{58    static async Task Main(string[] args)59    {60        using var playwright = await Playwright.CreateAsync();

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System;4using System.Collections.Generic;5using System.Text;6using System.Threading.Tasks;7using Xunit;8using Xunit.Abstractions;9{10    {11        public async Task ShouldWorkWithAPath()12        {13            await Page.GotoAsync(Server.Prefix + "/grid.html");14            var styleHandle = await Page.AddStyleTagAsync(new PageAddStyleTagOptions15            {16            });17            Assert.NotNull(styleHandle);18            var styleContent = await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.querySelector('body')).getPropertyValue('background-color')");19            Assert.Equal("rgb(255, 0, 0)", styleContent);20        }21    }22}23using Microsoft.Playwright;24using Microsoft.Playwright.Tests;25using NUnit.Framework;26using System.Threading.Tasks;27{28    {29        public async Task ShouldWorkWithAPath()30        {31            await Page.GotoAsync(Server.Prefix + "/grid.html");32            var styleHandle = await Page.AddStyleTagAsync(new PageAddStyleTagOptions33            {34            });35            Assert.NotNull(styleHandle);36            var styleContent = await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.querySelector('body')).getPropertyValue('background-color')");37            Assert.AreEqual("rgb(255, 0, 0)", styleContent);38        }39    }40}41using Microsoft.Playwright;42using Microsoft.Playwright.Tests;43using System.Threading.Tasks;44using Xunit;45using Xunit.Abstractions;46{47    {

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using Microsoft.Playwright;3using System.Threading.Tasks;4using Xunit;5using Xunit.Abstractions;6{7    {8        public PageAddStyleTagTests(ITestOutputHelper output) : base(output)9        {10        }11        public async Task ShouldWork()12        {13            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");14            var styleHandle = await Page.AddStyleTagAsync(new() { Content = "body { background-color: green; }" });15            Assert.Contains("green", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));16            await styleHandle.DisposeAsync();17            Assert.Contains("white", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));18        }19    }20}21using Microsoft.Playwright;22using System.Threading.Tasks;23using Xunit;24using Xunit.Abstractions;25{26    {27        public PageAddStyleTagTests(ITestOutputHelper output) : base(output)28        {29        }30        public async Task ShouldWork()31        {32            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");33            var styleHandle = await Page.AddStyleTagAsync(new() { Content = "body { background-color: green; }" });34            Assert.Contains("green", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));35            await styleHandle.DisposeAsync();36            Assert.Contains("white", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));37        }38    }39}

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using NUnit.Framework;4using System.Threading.Tasks;5{6    {7        public async Task ShouldWork()8        {9            using var playwright = await Playwright.CreateAsync();10            using var browser = await playwright.Chromium.LaunchAsync();11            using var context = await browser.NewContextAsync();12            var page = await context.NewPageAsync();13            var styleHandle = await page.AddStyleTagAsync(new()14            {15                Content = "body {background-color: green;}",16            });17            Assert.AreEqual("green", await page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));18            await styleHandle.DisposeAsync();19            Assert.AreEqual("rgba(0, 0, 0, 0)", await page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));20        }21        public async Task ShouldThrowWhenAddedWithUrlAndPath()22        {23            using var playwright = await Playwright.CreateAsync();24            using var browser = await playwright.Chromium.LaunchAsync();25            using var context = await browser.NewContextAsync();26            var page = await context.NewPageAsync();27            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => page.AddStyleTagAsync(new()28            {29            }));30            StringAssert.Contains("Either path or url options must be specified", exception.Message);31        }32        public async Task ShouldThrowWhenAddedWithUrlAndContent()33        {34            using var playwright = await Playwright.CreateAsync();35            using var browser = await playwright.Chromium.LaunchAsync();36            using var context = await browser.NewContextAsync();37            var page = await context.NewPageAsync();38            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => page.AddStyleTagAsync(new()39            {40                Content = "body {background-color: green;}",41            }));42            StringAssert.Contains("Either path or url options must be specified", exception.Message);43        }44        public async Task ShouldThrowWhenAddedWithUrlAndPathAndType()45        {46            using var playwright = await Playwright.CreateAsync();

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using NUnit.Framework;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static void Main(string[] args)11        {12            PageAddStyleTagTests p = new PageAddStyleTagTests();13            p.PageAddStyleTag();14        }15    }16}17using Microsoft.Playwright.Tests;18using NUnit.Framework;19using System;20using System.Collections.Generic;21using System.Linq;22using System.Text;23using System.Threading.Tasks;24{25    {26        static void Main(string[] args)27        {28            PageAddStyleTagTests p = new PageAddStyleTagTests();29            p.PageAddStyleTagWithContent();30        }31    }32}33using Microsoft.Playwright.Tests;34using NUnit.Framework;35using System;36using System.Collections.Generic;37using System.Linq;38using System.Text;39using System.Threading.Tasks;40{41    {42        static void Main(string[] args)43        {44            PageAddStyleTagTests p = new PageAddStyleTagTests();45            p.PageAddStyleTagWithUrl();46        }47    }48}49using Microsoft.Playwright.Tests;50using NUnit.Framework;51using System;52using System.Collections.Generic;53using System.Linq;54using System.Text;55using System.Threading.Tasks;56{57    {58        static void Main(string[] args)59        {60            PageAddStyleTagTests p = new PageAddStyleTagTests();61            p.PageAddStyleTagWithUrlAndPath();62        }63    }64}65using Microsoft.Playwright.Tests;66using NUnit.Framework;67using System;68using System.Collections.Generic;69using System.Linq;70using System.Text;71using System.Threading.Tasks;72{73    {74        static void Main(string[] args)75        {76            PageAddStyleTagTests p = new PageAddStyleTagTests();

PageAddStyleTagTests

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Playwright.Tests;7using Microsoft.Playwright;8{9    {10        static async Task Main(string[] args)11        {12            using var playwright = await Playwright.CreateAsync();13            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions14            {15            });16            var context = await browser.NewContextAsync();17            var page = await context.NewPageAsync();18            await page.AddStyleTagAsync(new PageAddStyleTagOptions19            {20                Content = "body { background-color: green; }",21            });22            await Task.Delay(3000);23            await browser.CloseAsync();24        }25    }26}27using System;28using System.Collections.Generic;29using System.Linq;30using System.Text;31using System.Threading.Tasks;32using Microsoft.Playwright.Tests;33using Microsoft.Playwright;34using var playwright = await Playwright.CreateAsync();35await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions36{37});38var context = await browser.NewContextAsync();39var page = await context.NewPageAsync();40await page.AddStyleTagAsync(new PageAddStyleTagOptions41{42    Content = "body { background-color: green; }",43});44await Task.Delay(3000);45await browser.CloseAsync();

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright.Tests;2PageAddStyleTagTests objPageAddStyleTagTests = new PageAddStyleTagTests();3objPageAddStyleTagTests.PageAddStyleTag();4using Microsoft.Playwright.Tests;5using Microsoft.Playwright;6using System.Threading.Tasks;7using System;8using System.Threading;9using System.IO;10using System.Text;11using System.Text.RegularExpressions;12using System.Collections.Generic;13using System.Linq;14using System.Net;15using System.Net.Http;16using System.Net.Http.Headers;17using System.Collections.Specialized;18using System.Collections;19using System.Runtime.Serialization;20using System.Runtime.Serialization.Json;21using System.Reflection;22using System.Diagnostics;23using System.Xml;24using System.Xml.Linq;25using System.Security.Cryptography;26using System.Security.Cryptography.X509Certificates;27using System.Security.Cryptography.Xml;28using System.Xml.Serialization;29using System.Xml.XPath;30using System.Xml.Xsl;31using Microsoft.Playwright.NUnit;32using NUnit.Framework;33{34    [Parallelizable(ParallelScope.Self)]35    {36        [PlaywrightTest("page-add-style-tag.spec.ts", "should work")]37        [Test, Timeout(TestConstants.DefaultTestTimeout)]38        public async Task ShouldWork()39        {40            await Page.AddStyleTagAsync(content: "body { background-color: green; }");41            Assert.AreEqual("rgb(0, 128, 0)", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));42        }43    }44}45using Microsoft.Playwright.Tests;46using Microsoft.Playwright;47{48    [Parallelizable(ParallelScope.Self)]49    {50        [PlaywrightTest("page-add-style-tag.spec.ts", "should work")]51        [Test, Timeout(TestConstants.DefaultTestTimeout)]52        public async Task ShouldWork()53        {54            await Page.AddStyleTagAsync(content: "body { background-color: green; }");55            Assert.AreEqual("rgb(0, 128, 0)", await Page.EvaluateAsync<string>("() => window.getComputedStyle(document.body).backgroundColor"));56        }57    }

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System;4using System.IO;5using System.Threading.Tasks;6{7    {8        static async Task Main(string[] args)9        {10            using var playwright = await Playwright.CreateAsync();11            await using var browser = await playwright.Chromium.LaunchAsync(new LaunchOptions { Headless = false });12            var context = await browser.NewContextAsync();13            var page = await context.NewPageAsync();14            await page.AddStyleTagAsync(new PageAddStyleTagOptions15            {16                Content = "body { background-color: green; }"17            });18            await page.WaitForTimeoutAsync(5000);19            await page.AddStyleTagAsync(new PageAddStyleTagOptions20            {21            });22            await page.WaitForTimeoutAsync(5000);23            await page.AddStyleTagAsync(new PageAddStyleTagOptions24            {25            });26            await page.WaitForTimeoutAsync(5000);27        }28    }29}

PageAddStyleTagTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Webkit.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            var pageAddStyleTagTests = new PageAddStyleTagTests(page);14            await pageAddStyleTagTests.AddStyleTag();15        }16    }17}18using Microsoft.Playwright;19using Microsoft.Playwright.Tests;20using System.Threading.Tasks;21{22    {23        static async Task Main(string[] args)24        {25            using var playwright = await Playwright.CreateAsync();26            await using var browser = await playwright.Webkit.LaunchAsync(new BrowserTypeLaunchOptions27            {28            });29            var page = await browser.NewPageAsync();30            var pageAddStyleTagTests = new PageAddStyleTagTests(page);31            await pageAddStyleTagTests.AddStyleTag();32        }33    }34}35using Microsoft.Playwright;36using Microsoft.Playwright.Tests;37using System.Threading.Tasks;38{39    {40        static async Task Main(string[] args)41        {42            using var playwright = await Playwright.CreateAsync();43            await using var browser = await playwright.Webkit.LaunchAsync(new BrowserTypeLaunchOptions44            {45            });46            var page = await browser.NewPageAsync();47            var pageAddStyleTagTests = new PageAddStyleTagTests(page);48            await pageAddStyleTagTests.AddStyleTag();49        }50    }51}

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.

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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.
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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.
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