How to use PageEmulateVisionDeficiencyTests class of PuppeteerSharp.Tests.EmulationTests package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.EmulationTests.PageEmulateVisionDeficiencyTests

PageEmulateVisionDeficiencyTests.cs

Source:PageEmulateVisionDeficiencyTests.cs

...5using Xunit.Abstractions;6namespace PuppeteerSharp.Tests.EmulationTests7{8    [Collection(TestConstants.TestFixtureCollectionName)]9    public class PageEmulateVisionDeficiencyTests : PuppeteerPageBaseTest10    {11        public PageEmulateVisionDeficiencyTests(ITestOutputHelper output) : base(output)12        {13        }14        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work")]15        [SkipBrowserFact(skipFirefox: true)]16        public async Task ShouldWork()17        {18            await Page.SetViewportAsync(new ViewPortOptions { Width = 500, Height = 500 });19            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");20            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.None);21            var screenshot = await Page.ScreenshotDataAsync();22            Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", screenshot));23            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Achromatopsia);24            screenshot = await Page.ScreenshotDataAsync();25            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-achromatopsia.png", screenshot));...

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp;7using PuppeteerSharp.Tests.EmulationTests;8{9    {10        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work")]11        public async Task ShouldWork()12        {13            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Achromatopsia);14            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");15            Assert.Equal("rgb(255, 255, 255)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#red")).BackgroundColor));16            Assert.Equal("rgb(0, 0, 0)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#green")).BackgroundColor));17            Assert.Equal("rgb(0, 0, 0)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#blue")).BackgroundColor));18            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Deuteranopia);19            Assert.Equal("rgb(255, 255, 255)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#red")).BackgroundColor));20            Assert.Equal("rgb(0, 0, 0)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#green")).BackgroundColor));21            Assert.Equal("rgb(0, 0, 0)", await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(document.querySelector(\"#blue")).BackgroundColor));22        }23    }24}25using System;26using System.Collections.Generic;27using System.Linq;28using System.Text;29using System.Threading.Tasks;30using PuppeteerSharp;31using PuppeteerSharp.Tests.EmulationTests;32{33    {34        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should throw on bad color space")]

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using PuppeteerSharp.Tests.EmulationTests;2using System;3using System.Collections.Generic;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7using Xunit;8using Xunit.Abstractions;9{10    [Collection("PuppeteerLoaderFixture collection")]11    {12        public PageEmulateVisionDeficiencyTests(ITestOutputHelper output) : base(output)13        {14        }15        public async Task ShouldWork()16        {17            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Protanopia);18            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");19            var screenshot = await Page.ScreenshotDataAsync();20            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-grid.png", screenshot) < 0.1);21        }22        public async Task ShouldSupportChaining()23        {24            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Protanopia);25            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Deuteranopia);26            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");27            var screenshot = await Page.ScreenshotDataAsync();28            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-grid.png", screenshot) < 0.1);29        }30        public async Task ShouldThrowWhenBadArgument()31        {32            var exception = await Assert.ThrowsAsync<ArgumentException>(()33                => Page.EmulateVisionDeficiencyAsync((VisionDeficiencyType)100));34            Assert.Equal("visionDeficiency", exception.ParamName);35        }36    }37}38using PuppeteerSharp.Tests.EvaluationTests;39using System;40using System.Collections.Generic;41using System.Linq;42using System.Text;43using System.Threading.Tasks;44using Xunit;45using Xunit.Abstractions;46{47    [Collection("PuppeteerLoaderFixture collection")]48    {49        public PageEvaluateTests(ITestOutputHelper output) : base(output)50        {51        }52        public async Task ShouldWork()53        {54            var result = await Page.EvaluateExpressionAsync<int>("7 * 3

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using PuppeteerSharp.Tests.EmulationTests;2using System.Threading.Tasks;3{4    {5        static async Task Main(string[] args)6        {7            await PageEmulateVisionDeficiencyTests.ShouldWork();8        }9    }10}11      System.InvalidOperationException : Protocol error (Emulation.setEmulatedMedia): 'Emulation.setEmulatedMedia' wasn't found12           at PuppeteerSharp.Connection.ProcessMessageAsync(String message)

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1{2    public static async Task Main(string[] args)3    {4        var browserFetcher = new BrowserFetcher();5        var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);6        var browser = await Puppeteer.LaunchAsync(new LaunchOptions7        {8        });9        var page = await browser.NewPageAsync();10        var emulationTests = new PuppeteerSharp.Tests.EmulationTests.PageEmulateVisionDeficiencyTests(page);11        await emulationTests.ShouldWork();12        await browser.CloseAsync();13    }14}15{16    public static async Task Main(string[] args)17    {18        var browserFetcher = new BrowserFetcher();19        var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);20        var browser = await Puppeteer.LaunchAsync(new LaunchOptions21        {22        });23        var page = await browser.NewPageAsync();24        var emulationTests = new PuppeteerSharp.Tests.EmulationTests.PageEmulateVisionDeficiencyTests(page);25        await emulationTests.ShouldWork();26        await browser.CloseAsync();27    }28}29{30    public static async Task Main(string[] args)31    {32        var browserFetcher = new BrowserFetcher();33        var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);34        var browser = await Puppeteer.LaunchAsync(new LaunchOptions35        {36        });37        var page = await browser.NewPageAsync();38        var emulationTests = new PuppeteerSharp.Tests.EmulationTests.PageEmulateVisionDeficiencyTests(page);39        await emulationTests.ShouldWork();40        await browser.CloseAsync();41    }42}43{44    public static async Task Main(string[] args)45    {46        var browserFetcher = new BrowserFetcher();

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Tests.EmulationTests;7using PuppeteerSharp.Tests.InputTests;8using PuppeteerSharp.Tests.PageTests;9{10    {11        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work")]12        public async Task ShouldWork()13        {14            await Page.EmulateVisionDeficiency(VisionDeficiency.Achromatopsia);15            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");16            var grid = await Page.EvaluateFunctionAsync<string>("() => window.getComputedStyle(document.querySelector('#grid')).backgroundImage");17            Assert.Equal("url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9gGDQsYDZi8aWwAAAAGdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAB1klEQVQoz3XQsQ3CUBCG4W8iG4g4C4i4C4i4C4i4C4i4C4i4C4i

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using PuppeteerSharp;5{6    {7        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work")]8        public async Task ShouldWork()9        {10            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");11            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Achromatopsia);12            var screenshot = await Page.ScreenshotDataAsync();13            Assert.True(ScreenshotHelper.PixelMatch("grid.achromatopsia.png", screenshot) < 0.1);14        }15        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should be detectable by page.accessibility.snapshot")]16        public async Task ShouldBeDetectableByPageAccessibilitySnapshot()17        {18            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");19            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Achromatopsia);20            var snapshot = await Page.Accessibility.SnapshotAsync();21            Assert.Contains("achromatopsia", snapshot.Children[0].Name);22        }23        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should force a style recalc")]24        public async Task ShouldForceAStyleRecalc()25        {26            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");27            await Page.EvaluateExpressionAsync("document.body.style.background = 'red'");28            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Achromatopsia);29            var screenshot = await Page.ScreenshotDataAsync();30            Assert.True(ScreenshotHelper.PixelMatch("grid.achromatopsia.png", screenshot) < 0.1);31        }32        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work with transparency")]33        public async Task ShouldWorkWithTransparency()34        {35            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Collections.Generic;4using System.Linq;5using System.Threading.Tasks;6{7    {8        [PuppeteerTest("emulation.spec.ts", "Page.EmulateVisionDeficiency", "should work")]9        public async Task ShouldWork()10        {11            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Deuteranopia);12            await Page.SetContentAsync(@"13                div {14                    background-color: blue;15                    width: 200px;16                    height: 200px;17                }18            ");19            var screenshot = await Page.ScreenshotDataAsync();20            Assert.True(TestUtils.CheckImage("emulation.visionDeficiency.deuteranopia.png", screenshot));21        }22        [PuppeteerTest("emulation.spec.ts", "Page.EmulateVisionDeficiency", "should throw on unknown type")]23        public async Task ShouldThrowOnUnknownType()24        {25            var exception = await Assert.ThrowsAsync<ArgumentException>(()26                => Page.EmulateVisionDeficiencyAsync((VisionDeficiencyType) 3));27            Assert.Contains("Unknown vision deficiency type", exception.Message);28        }29        [PuppeteerTest("emulation.spec.ts", "Page.EmulateVisionDeficiency", "should throw on unknown type")]30        public async Task ShouldThrowOnUnknownTypeWithEnumName()31        {32            var exception = await Assert.ThrowsAsync<ArgumentException>(()33                => Page.EmulateVisionDeficiencyAsync((VisionDeficiencyType) 3));34            Assert.Contains("Unknown vision deficiency type", exception.Message);35        }36        [PuppeteerTest("emulation.spec.ts", "Page.EmulateVisionDeficiency", "should throw on bad contrast")]37        public async Task ShouldThrowOnBadContrast()38        {39            var exception = await Assert.ThrowsAsync<ArgumentOutOfRangeException>(()

PageEmulateVisionDeficiencyTests

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.EmulationTests;4using PuppeteerSharp;5{6    {7        [PuppeteerTest("emulation.spec.ts", "Page.emulateVisionDeficiency", "should work")]8        public async Task ShouldWork()9        {10            await Page.EmulateVisionDeficiencyAsync(VisionDeficiencyType.Protanopia);11            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");12            var element = await Page.QuerySelectorAsync(".box:nth-of-type(13)");13            var result = await Page.EvaluateExpressionAsync<string>("window.getComputedStyle(arguments[0]).backgroundColor", element);14            Assert.Equal("rgb(255, 128, 0)", result);15        }16    }17}18using System;19using System.Threading.Tasks;20using PuppeteerSharp.Tests.EmulationTests;21using PuppeteerSharp;22{23    {24        [PuppeteerTest("emulation.spec.ts", "Page.emulateViewport", "should work")]25        public async Task ShouldWork()26        {27            await Page.EmulateViewportAsync(320, 480);28            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");29            Assert.Equal(320, await Page.EvaluateExpressionAsync<int>("window.innerWidth"));30            Assert.Equal(480, await Page.EvaluateExpressionAsync<int>("window.innerHeight"));31            Assert.Equal(320, await Page.EvaluateExpressionAsync<int>("document.body.clientWidth"));32            Assert.Equal(480, await Page.EvaluateExpressionAsync<int>("document.body.clientHeight"));33            Assert.Equal(320, await Page.EvaluateExpressionAsync<int>("document.body.offsetWidth"));34            Assert.Equal(480, await Page.EvaluateExpressionAsync<int>("document.body.offsetHeight"));35            Assert.Equal(320, await Page.EvaluateExpressionAsync<int>("document.documentElement.clientWidth"));36            Assert.Equal(480, await Page.EvaluateExpressionAsync<int>("document.documentElement.clientHeight"));37            Assert.Equal(320

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.