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

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

ElementHandleScreenshotTests.cs

Source:ElementHandleScreenshotTests.cs

...40            await Page.GotoAsync(Server.Prefix + "/grid.html");41            await Page.EvaluateAsync("window.scrollBy(50, 100)");42            var elementHandle = await Page.QuerySelectorAsync(".box:nth-of-type(3)");43            byte[] screenshot = await elementHandle.ScreenshotAsync();44            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-bounding-box.png", screenshot));45        }46        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should take into account padding and border")]47        public async Task ShouldTakeIntoAccountPaddingAndBorder()48        {49            await Page.SetViewportSizeAsync(500, 500);50            await Page.SetContentAsync(@"51                <div style=""height: 14px"">oooo</div>52                <style>div {53                    border: 2px solid blue;54                    background: green;55                    width: 50px;56                    height: 50px;57                }58                </style>59                <div id=""d""></div>");60            var elementHandle = await Page.QuerySelectorAsync("div#d");61            byte[] screenshot = await elementHandle.ScreenshotAsync();62            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-padding-border.png", screenshot));63        }64        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should capture full element when larger than viewport in parallel")]65        public async Task ShouldCaptureFullElementWhenLargerThanViewportInParallel()66        {67            await Page.SetViewportSizeAsync(500, 500);68            await Page.SetContentAsync(@"69                <div style=""height: 14px"">oooo</div>70                <style>71                div.to-screenshot {72                  border: 1px solid blue;73                  width: 600px;74                  height: 600px;75                  margin-left: 50px;76                }77                ::-webkit-scrollbar{78                  display: none;79                }80                </style>81                <div class=""to-screenshot""></div>82                <div class=""to-screenshot""></div>83                <div class=""to-screenshot""></div>84            ");85            var elementHandles = await Page.QuerySelectorAllAsync("div.to-screenshot");86            var screenshotTasks = elementHandles.Select(e => e.ScreenshotAsync()).ToArray();87            await TaskUtils.WhenAll(screenshotTasks);88            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-larger-than-viewport.png", screenshotTasks.ElementAt(2).Result));89        }90        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should capture full element when larger than viewport")]91        public async Task ShouldCaptureFullElementWhenLargerThanViewport()92        {93            await Page.SetViewportSizeAsync(500, 500);94            await Page.SetContentAsync(@"95                <div style=""height: 14px"">oooo</div>96                <style>97                div.to-screenshot {98                  border: 1px solid blue;99                  width: 600px;100                  height: 600px;101                  margin-left: 50px;102                }103                ::-webkit-scrollbar{104                  display: none;105                }106                </style>107                <div class=""to-screenshot""></div>108                <div class=""to-screenshot""></div>109                <div class=""to-screenshot""></div>");110            var elementHandle = await Page.QuerySelectorAsync("div.to-screenshot");111            byte[] screenshot = await elementHandle.ScreenshotAsync();112            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-larger-than-viewport.png", screenshot));113            await TestUtils.VerifyViewportAsync(Page, 500, 500);114        }115        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should scroll element into view")]116        public async Task ShouldScrollElementIntoView()117        {118            await Page.SetViewportSizeAsync(500, 500);119            await Page.SetContentAsync(@"120                <div style=""height: 14px"">oooo</div>121                <style>div.above {122                  border: 2px solid blue;123                  background: red;124                  height: 1500px;125                }126                div.to-screenshot {127                  border: 2px solid blue;128                  background: green;129                  width: 50px;130                  height: 50px;131                }132                </style>133                <div class=""above""></div>134                <div class=""to-screenshot""></div>");135            var elementHandle = await Page.QuerySelectorAsync("div.to-screenshot");136            byte[] screenshot = await elementHandle.ScreenshotAsync();137            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-scrolled-into-view.png", screenshot));138        }139        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should scroll 15000px into view")]140        public async Task ShouldScroll15000pxIntoView()141        {142            await Page.SetViewportSizeAsync(500, 500);143            await Page.SetContentAsync(@"144                <div style=""height: 14px"">oooo</div>145                <style>div.above {146                  border: 2px solid blue;147                  background: red;148                  height: 15000px;149                }150                div.to-screenshot {151                  border: 2px solid blue;152                  background: green;153                  width: 50px;154                  height: 50px;155                }156                </style>157                <div class=""above""></div>158                <div class=""to-screenshot""></div>");159            var elementHandle = await Page.QuerySelectorAsync("div.to-screenshot");160            byte[] screenshot = await elementHandle.ScreenshotAsync();161            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-scrolled-into-view.png", screenshot));162        }163        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should work with a rotated element")]164        public async Task ShouldWorkWithARotatedElement()165        {166            await Page.SetViewportSizeAsync(500, 500);167            await Page.SetContentAsync(@"168                <div style='position: absolute;169                top: 100px;170                left: 100px;171                width: 100px;172                height: 100px;173                background: green;174                transform: rotateZ(200deg); '>&nbsp;</div>175            ");176            var elementHandle = await Page.QuerySelectorAsync("div");177            byte[] screenshot = await elementHandle.ScreenshotAsync();178            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-rotate.png", screenshot));179        }180        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should fail to screenshot a detached element")]181        public async Task ShouldFailToScreenshotADetachedElement()182        {183            await Page.SetContentAsync("<h1>remove this</h1>");184            var elementHandle = await Page.QuerySelectorAsync("h1");185            await Page.EvaluateAsync("element => element.remove()", elementHandle);186            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => elementHandle.ScreenshotAsync());187            StringAssert.Contains("Element is not attached to the DOM", exception.Message);188        }189        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should timeout waiting for visible")]190        public async Task ShouldTimeoutWaitingForVisible()191        {192            await Page.SetContentAsync(@"<div style='width: 50px; height: 0'></div>");193            var elementHandle = await Page.QuerySelectorAsync("div");194            var exception = await PlaywrightAssert.ThrowsAsync<TimeoutException>(() => elementHandle.ScreenshotAsync(new() { Timeout = 3000 }));195            StringAssert.Contains("Timeout 3000ms exceeded", exception.Message);196            StringAssert.Contains("element is not visible", exception.Message);197        }198        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should wait for visible")]199        public async Task ShouldWaitForVisible()200        {201            await Page.SetViewportSizeAsync(500, 500);202            await Page.GotoAsync(Server.Prefix + "/grid.html");203            await Page.EvaluateAsync("() => window.scrollBy(50, 100)");204            var elementHandle = await Page.QuerySelectorAsync(".box:nth-of-type(3)");205            await elementHandle.EvaluateAsync("e => e.style.visibility = 'hidden'");206            var task = elementHandle.ScreenshotAsync();207            for (int i = 0; i < 10; i++)208            {209                await Page.EvaluateAsync("() => new Promise(f => requestAnimationFrame(f))");210            }211            Assert.False(task.IsCompleted);212            await elementHandle.EvaluateAsync("e => e.style.visibility = 'visible'");213            byte[] screenshot = await task;214            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-bounding-box.png", screenshot));215        }216        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should work for an element with fractional dimensions")]217        public async Task ShouldWorkForAnElementWithFractionalDimensions()218        {219            await Page.SetContentAsync("<div style=\"width:48.51px;height:19.8px;border:1px solid black;\"></div>");220            var elementHandle = await Page.QuerySelectorAsync("div");221            byte[] screenshot = await elementHandle.ScreenshotAsync();222            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-fractional.png", screenshot));223        }224        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should work with a mobile viewport")]225        [Skip(SkipAttribute.Targets.Firefox)]226        public async Task ShouldWorkWithAMobileViewport()227        {228            await using var context = await Browser.NewContextAsync(new()229            {230                ViewportSize = new()231                {232                    Width = 320,233                    Height = 480,234                },235                IsMobile = true,236            });237            var page = await context.NewPageAsync();238            await page.GotoAsync(Server.Prefix + "/grid.html");239            await page.EvaluateAsync("() => window.scrollBy(50, 100)");240            var elementHandle = await page.QuerySelectorAsync(".box:nth-of-type(3)");241            byte[] screenshot = await elementHandle.ScreenshotAsync();242            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-mobile.png", screenshot));243        }244        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should work with device scale factor")]245        [Skip(SkipAttribute.Targets.Firefox)]246        public async Task ShouldWorkWithDeviceScaleFactor()247        {248            await using var context = await Browser.NewContextAsync(new()249            {250                ViewportSize = new()251                {252                    Width = 320,253                    Height = 480,254                },255                DeviceScaleFactor = 2,256            });257            var page = await context.NewPageAsync();258            await page.GotoAsync(Server.Prefix + "/grid.html");259            await page.EvaluateAsync("() => window.scrollBy(50, 100)");260            var elementHandle = await page.QuerySelectorAsync(".box:nth-of-type(3)");261            byte[] screenshot = await elementHandle.ScreenshotAsync();262            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-mobile-dsf.png", screenshot));263        }264        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should work for an element with an offset")]265        public async Task ShouldWorkForAnElementWithAnOffset()266        {267            await Page.SetContentAsync("<div style=\"position:absolute; top: 10.3px; left: 20.4px;width:50.3px;height:20.2px;border:1px solid black;\"></div>");268            var elementHandle = await Page.QuerySelectorAsync("div");269            byte[] screenshot = await elementHandle.ScreenshotAsync();270            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-fractional-offset.png", screenshot));271        }272        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should take screenshots when default viewport is null")]273        public async Task ShouldTakeScreenshotsWhenDefaultViewportIsNull()274        {275            await using var context = await Browser.NewContextAsync(new()276            {277                ViewportSize = ViewportSize.NoViewport278            });279            var page = await context.NewPageAsync();280            await page.SetContentAsync("<div style='height: 10000px; background: red'></div>");281            var windowSize = await page.EvaluateAsync<ViewportSize>("() => ({ width: window.innerWidth * window.devicePixelRatio, height: window.innerHeight * window.devicePixelRatio })");282            var sizeBefore = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");283            byte[] screenshot = await page.ScreenshotAsync();284            Assert.NotNull(screenshot);285            var decoded = Image.Load(screenshot);286            Assert.AreEqual(windowSize.Width, decoded.Width);287            Assert.AreEqual(windowSize.Height, decoded.Height);288            var sizeAfter = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");289            Assert.AreEqual(sizeBefore.Width, sizeAfter.Width);290            Assert.AreEqual(sizeBefore.Height, sizeAfter.Height);291        }292        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should take fullPage screenshots when default viewport is null")]293        public async Task ShouldTakeFullPageScreenshotsWhenDefaultViewportIsNull()294        {295            await using var context = await Browser.NewContextAsync(new()296            {297                ViewportSize = ViewportSize.NoViewport298            });299            var page = await context.NewPageAsync();300            await page.GotoAsync(Server.Prefix + "/grid.html");301            var sizeBefore = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");302            byte[] screenshot = await page.ScreenshotAsync(new() { FullPage = true });303            Assert.NotNull(screenshot);304            var sizeAfter = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");305            Assert.AreEqual(sizeBefore.Width, sizeAfter.Width);306            Assert.AreEqual(sizeBefore.Height, sizeAfter.Height);307        }308        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should restore default viewport after fullPage screenshot")]309        public async Task ShouldRestoreDefaultViewportAfterFullPageScreenshot()310        {311            await using var context = await Browser.NewContextAsync(new()312            {313                ViewportSize = new() { Width = 456, Height = 789 },314            });315            var page = await context.NewPageAsync();316            await TestUtils.VerifyViewportAsync(page, 456, 789);317            byte[] screenshot = await page.ScreenshotAsync(new() { FullPage = true });318            Assert.NotNull(screenshot);319            await TestUtils.VerifyViewportAsync(page, 456, 789);320        }321        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should take element screenshot when default viewport is null and restore back")]322        public async Task ShouldTakeElementScreenshotWhenDefaultViewportIsNullAndRestoreBack()323        {324            await using var context = await Browser.NewContextAsync(new()325            {326                ViewportSize = ViewportSize.NoViewport,327            });328            var page = await context.NewPageAsync();329            await page.SetContentAsync(@"330                <div style=""height: 14px"">oooo</div>331                <style>332                div.to-screenshot {333                border: 1px solid blue;334                width: 600px;335                height: 600px;336                margin-left: 50px;337                }338                ::-webkit-scrollbar{339                display: none;340                }341                </style>342                <div class=""to-screenshot""></div>343                <div class=""to-screenshot""></div>344                <div class=""to-screenshot""></div>");345            var sizeBefore = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");346            var elementHandle = await page.QuerySelectorAsync("div.to-screenshot");347            byte[] screenshot = await elementHandle.ScreenshotAsync();348            Assert.NotNull(screenshot);349            var sizeAfter = await page.EvaluateAsync<ViewportSize>("() => ({ width: document.body.offsetWidth, height: document.body.offsetHeight })");350            Assert.AreEqual(sizeBefore.Width, sizeAfter.Width);351            Assert.AreEqual(sizeBefore.Height, sizeAfter.Height);352        }353        [PlaywrightTest("elementhandle-screenshot.spec.ts", "should take screenshot of disabled button")]354        public async Task ShouldTakeScreenshotOfDisabledButton()355        {356            await Page.SetViewportSizeAsync(500, 500);357            await Page.SetContentAsync("<button disabled>Click me</button>");358            var button = await Page.QuerySelectorAsync("button");359            byte[] screenshot = await button.ScreenshotAsync();360            Assert.NotNull(screenshot);361        }362        [PlaywrightTest("elementhandle-screenshot.spec.ts", "path option should create subdirectories")]363        public async Task PathOptionShouldCreateSubdirectories()364        {365            await Page.SetViewportSizeAsync(500, 500);366            await Page.GotoAsync(Server.Prefix + "/grid.html");367            await Page.EvaluateAsync("() => window.scrollBy(50, 100)");368            var elementHandle = await Page.QuerySelectorAsync(".box:nth-of-type(3)");369            using var tmpDir = new TempDirectory();370            string outputPath = Path.Combine(tmpDir.Path, "these", "are", "directories", "screenshot.png");371            await elementHandle.ScreenshotAsync(new() { Path = outputPath });372            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-bounding-box.png", outputPath));373        }374    }375}...

PageScreenshotTests.cs

Source:PageScreenshotTests.cs

...38        {39            await Page.SetViewportSizeAsync(500, 500);40            await Page.GotoAsync(Server.Prefix + "/grid.html");41            byte[] screenshot = await Page.ScreenshotAsync();42            Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", screenshot));43        }44        [PlaywrightTest("page-screenshot.spec.ts", "should clip rect")]45        public async Task ShouldClipRect()46        {47            await Page.SetViewportSizeAsync(500, 500);48            await Page.GotoAsync(Server.Prefix + "/grid.html");49            byte[] screenshot = await Page.ScreenshotAsync(new()50            {51                Clip = new()52                {53                    X = 50,54                    Y = 100,55                    Width = 150,56                    Height = 10057                }58            }59            );60            Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-rect.png", screenshot));61        }62        [PlaywrightTest("page-screenshot.spec.ts", "should clip rect with fullPage")]63        public async Task ShouldClipRectWithFullPage()64        {65            await Page.SetViewportSizeAsync(500, 500);66            await Page.GotoAsync(Server.Prefix + "/grid.html");67            await Page.EvaluateAsync("() => window.scrollBy(150, 200)");68            byte[] screenshot = await Page.ScreenshotAsync(new()69            {70                FullPage = true,71                Clip = new()72                {73                    X = 50,74                    Y = 100,75                    Width = 150,76                    Height = 100,77                }78            });79            Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-rect.png", screenshot));80        }81        [PlaywrightTest("page-screenshot.spec.ts", "should clip elements to the viewport")]82        public async Task ShouldClipElementsToTheViewport()83        {84            await Page.SetViewportSizeAsync(500, 500);85            await Page.GotoAsync(Server.Prefix + "/grid.html");86            byte[] screenshot = await Page.ScreenshotAsync(new()87            {88                Clip = new()89                {90                    X = 50,91                    Y = 450,92                    Width = 1000,93                    Height = 100,94                }95            });96            Assert.True(ScreenshotHelper.PixelMatch("screenshot-offscreen-clip.png", screenshot));97        }98        [PlaywrightTest("page-screenshot.spec.ts", "should throw on clip outside the viewport")]99        public async Task ShouldThrowOnClipOutsideTheViewport()100        {101            await Page.SetViewportSizeAsync(500, 500);102            await Page.GotoAsync(Server.Prefix + "/grid.html");103            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => Page.ScreenshotAsync(new()104            {105                Clip = new()106                {107                    X = 50,108                    Y = 650,109                    Width = 100,110                    Height = 100,111                }112            }));113            StringAssert.Contains("Clipped area is either empty or outside the resulting image", exception.Message);114        }115        [PlaywrightTest("page-screenshot.spec.ts", "should run in parallel")]116        public async Task ShouldRunInParallel()117        {118            await Page.SetViewportSizeAsync(500, 500);119            await Page.GotoAsync(Server.Prefix + "/grid.html");120            var tasks = new List<Task<byte[]>>();121            for (int i = 0; i < 3; ++i)122            {123                tasks.Add(Page.ScreenshotAsync(new()124                {125                    Clip = new()126                    {127                        X = 50 * i,128                        Y = 0,129                        Width = 50,130                        Height = 50131                    }132                }));133            }134            await TaskUtils.WhenAll(tasks);135            Assert.True(ScreenshotHelper.PixelMatch("grid-cell-1.png", tasks[0].Result));136        }137        [PlaywrightTest("page-screenshot.spec.ts", "should take fullPage screenshots")]138        public async Task ShouldTakeFullPageScreenshots()139        {140            await Page.SetViewportSizeAsync(500, 500);141            await Page.GotoAsync(Server.Prefix + "/grid.html");142            byte[] screenshot = await Page.ScreenshotAsync(new() { FullPage = true });143            Assert.True(ScreenshotHelper.PixelMatch("screenshot-grid-fullpage.png", screenshot));144        }145        [PlaywrightTest("page-screenshot.spec.ts", "should restore viewport after fullPage screenshot")]146        public async Task ShouldRestoreViewportAfterFullPageScreenshot()147        {148            await Page.SetViewportSizeAsync(500, 500);149            await Page.GotoAsync(Server.Prefix + "/grid.html");150            await Page.ScreenshotAsync(new() { FullPage = true });151            Assert.AreEqual(500, Page.ViewportSize.Width);152            Assert.AreEqual(500, Page.ViewportSize.Height);153        }154        [PlaywrightTest("page-screenshot.spec.ts", "should run in parallel in multiple pages")]155        public async Task ShouldRunInParallelInMultiplePages()156        {157            int n = 5;158            var pageTasks = new List<Task<IPage>>();159            for (int i = 0; i < n; i++)160            {161                async Task<IPage> Func()162                {163                    var page = await Context.NewPageAsync();164                    await page.GotoAsync(Server.Prefix + "/grid.html");165                    return page;166                }167                pageTasks.Add(Func());168            }169            await TaskUtils.WhenAll(pageTasks);170            var screenshotTasks = new List<Task<byte[]>>();171            for (int i = 0; i < n; i++)172            {173                screenshotTasks.Add(pageTasks[i].Result.ScreenshotAsync(new()174                {175                    Clip = new()176                    {177                        X = 50 * (i % 2),178                        Y = 0,179                        Width = 50,180                        Height = 50181                    }182                }));183            }184            await TaskUtils.WhenAll(screenshotTasks);185            for (int i = 0; i < n; i++)186            {187                Assert.True(ScreenshotHelper.PixelMatch($"grid-cell-{i % 2}.png", screenshotTasks[i].Result));188            }189            var closeTasks = new List<Task>();190            for (int i = 0; i < n; i++)191            {192                closeTasks.Add(pageTasks[i].Result.CloseAsync());193            }194            await TaskUtils.WhenAll(closeTasks);195        }196        [PlaywrightTest("page-screenshot.spec.ts", "should allow transparency")]197        [Skip(SkipAttribute.Targets.Firefox)]198        public async Task ShouldAllowTransparency()199        {200            await Page.SetViewportSizeAsync(50, 150);201            await Page.GotoAsync(Server.EmptyPage);202            byte[] screenshot = await Page.ScreenshotAsync(new() { OmitBackground = true });203            Assert.True(ScreenshotHelper.PixelMatch("transparent.png", screenshot));204        }205        [PlaywrightTest("page-screenshot.spec.ts", "should render white background on jpeg file")]206        public async Task ShouldRenderWhiteBackgroundOnJpegFile()207        {208            await Page.SetViewportSizeAsync(100, 100);209            await Page.GotoAsync(Server.EmptyPage);210            byte[] screenshot = await Page.ScreenshotAsync(new()211            {212                OmitBackground = true,213                Type = ScreenshotType.Jpeg,214            });215            Assert.True(ScreenshotHelper.PixelMatch("white.jpg", screenshot));216        }217        [PlaywrightTest("page-screenshot.spec.ts", "should work with odd clip size on Retina displays")]218        public async Task ShouldWorkWithOddClipSizeOnRetinaDisplays()219        {220            byte[] screenshot = await Page.ScreenshotAsync(new()221            {222                Clip = new()223                {224                    X = 0,225                    Y = 0,226                    Width = 11,227                    Height = 11228                }229            });230            Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-odd-size.png", screenshot));231        }232        [PlaywrightTest("page-screenshot.spec.ts", "should work with a mobile viewport")]233        [Skip(SkipAttribute.Targets.Firefox)]234        public async Task ShouldWorkWithAMobileViewport()235        {236            await using var context = await Browser.NewContextAsync(new()237            {238                ViewportSize = new()239                {240                    Width = 320,241                    Height = 480,242                },243                IsMobile = true,244            });245            var page = await context.NewPageAsync();246            await page.GotoAsync(Server.Prefix + "/overflow.html");247            byte[] screenshot = await page.ScreenshotAsync();248            Assert.True(ScreenshotHelper.PixelMatch("screenshot-mobile.png", screenshot));249        }250        [PlaywrightTest("page-screenshot.spec.ts", "should work with a mobile viewport and clip")]251        [Skip(SkipAttribute.Targets.Firefox)]252        public async Task ShouldWorkWithAMobileViewportAndClip()253        {254            await using var context = await Browser.NewContextAsync(new()255            {256                ViewportSize = new()257                {258                    Width = 320,259                    Height = 480,260                },261                IsMobile = true,262            });263            var page = await context.NewPageAsync();264            await page.GotoAsync(Server.Prefix + "/overflow.html");265            byte[] screenshot = await page.ScreenshotAsync(new()266            {267                Clip = new()268                {269                    X = 10,270                    Y = 10,271                    Width = 100,272                    Height = 150273                }274            });275            Assert.True(ScreenshotHelper.PixelMatch("screenshot-mobile-clip.png", screenshot));276        }277        [PlaywrightTest("page-screenshot.spec.ts", "should work with a mobile viewport and fullPage")]278        [Skip(SkipAttribute.Targets.Firefox)]279        public async Task ShouldWorkWithAMobileViewportAndFullPage()280        {281            await using var context = await Browser.NewContextAsync(new()282            {283                ViewportSize = new()284                {285                    Width = 320,286                    Height = 480,287                },288                IsMobile = true,289            });290            var page = await context.NewPageAsync();291            await page.GotoAsync(Server.Prefix + "/overflow-large.html");292            byte[] screenshot = await page.ScreenshotAsync(new() { FullPage = true });293            Assert.True(ScreenshotHelper.PixelMatch("screenshot-mobile-fullpage.png", screenshot));294        }295        [PlaywrightTest("page-screenshot.spec.ts", "should work for canvas")]296        public async Task ShouldWorkForCanvas()297        {298            await Page.SetViewportSizeAsync(500, 500);299            await Page.GotoAsync(Server.Prefix + "/screenshots/canvas.html");300            byte[] screenshot = await Page.ScreenshotAsync();301            Assert.True(ScreenshotHelper.PixelMatch("screenshot-canvas.png", screenshot));302        }303        [PlaywrightTest("page-screenshot.spec.ts", "should work for webgl")]304        [Skip(SkipAttribute.Targets.Firefox, SkipAttribute.Targets.Webkit)]305        public async Task ShouldWorkForWebgl()306        {307            await Page.SetViewportSizeAsync(640, 480);308            await Page.GotoAsync(Server.Prefix + "/screenshots/webgl.html");309            byte[] screenshot = await Page.ScreenshotAsync();310            Assert.True(ScreenshotHelper.PixelMatch("screenshot-webgl.png", screenshot));311        }312        [PlaywrightTest("page-screenshot.spec.ts", "should work for translateZ")]313        public async Task ShouldWorkForTranslateZ()314        {315            await Page.SetViewportSizeAsync(500, 500);316            await Page.GotoAsync(Server.Prefix + "/screenshots/translateZ.html");317            byte[] screenshot = await Page.ScreenshotAsync();318            Assert.True(ScreenshotHelper.PixelMatch("screenshot-translateZ.png", screenshot));319        }320        [PlaywrightTest("page-screenshot.spec.ts", "should work while navigating")]321        public async Task ShouldWorkWhileNavigating()322        {323            await Page.SetViewportSizeAsync(500, 500);324            await Page.GotoAsync(Server.Prefix + "/redirectloop1.html");325            for (int i = 0; i < 10; ++i)326            {327                try328                {329                    await Page.ScreenshotAsync();330                }331                catch (Exception ex) when (ex.Message.Contains("Cannot take a screenshot while page is navigating"))332                {333                }334            }335        }336        [PlaywrightTest("page-screenshot.spec.ts", "should work with device scale factor")]337        public async Task ShouldWorkWithDeviceScaleFactor()338        {339            await using var context = await Browser.NewContextAsync(new()340            {341                ViewportSize = new()342                {343                    Width = 320,344                    Height = 480,345                },346                DeviceScaleFactor = 2,347            });348            var page = await context.NewPageAsync();349            await page.GotoAsync(Server.Prefix + "/grid.html");350            byte[] screenshot = await page.ScreenshotAsync();351            Assert.True(ScreenshotHelper.PixelMatch("screenshot-device-scale-factor.png", screenshot));352        }353        [PlaywrightTest("page-screenshot.spec.ts", "should work with iframe in shadow")]354        public async Task ShouldWorkWithiFrameInShadow()355        {356            await using var context = await Browser.NewContextAsync(new()357            {358                ViewportSize = new()359                {360                    Width = 500,361                    Height = 500,362                },363            });364            var page = await context.NewPageAsync();365            await page.GotoAsync(Server.Prefix + "/grid-iframe-in-shadow.html");366            byte[] screenshot = await page.ScreenshotAsync();367            Assert.True(ScreenshotHelper.PixelMatch("screenshot-iframe.png", screenshot));368        }369        [PlaywrightTest("page-screenshot.spec.ts", "path option should work")]370        public async Task PathOptionShouldWork()371        {372            await Page.SetViewportSizeAsync(500, 500);373            await Page.GotoAsync(Server.Prefix + "/grid.html");374            using var tmpDir = new TempDirectory();375            string outputPath = Path.Combine(tmpDir.Path, "screenshot.png");376            await Page.ScreenshotAsync(new() { Path = outputPath });377            Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", outputPath));378        }379        [PlaywrightTest("page-screenshot.spec.ts", "path option should create subdirectories")]380        public async Task PathOptionShouldCreateSubdirectories()381        {382            await Page.SetViewportSizeAsync(500, 500);383            await Page.GotoAsync(Server.Prefix + "/grid.html");384            using var tmpDir = new TempDirectory();385            string outputPath = Path.Combine(tmpDir.Path, "these", "are", "directories", "screenshot.png");386            await Page.ScreenshotAsync(new() { Path = outputPath });387            Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", outputPath));388        }389        [PlaywrightTest("page-screenshot.spec.ts", "path option should detect joeg")]390        public async Task PathOptionShouldDetectJpeg()391        {392            await Page.SetViewportSizeAsync(100, 100);393            await Page.GotoAsync(Server.EmptyPage);394            using var tmpDir = new TempDirectory();395            string outputPath = Path.Combine(tmpDir.Path, "screenshot.jpg");396            await Page.ScreenshotAsync(new() { Path = outputPath, OmitBackground = true });397            Assert.True(ScreenshotHelper.PixelMatch("white.jpg", outputPath));398        }399        [PlaywrightTest("page-screenshot.spec.ts", "path option should throw for unsupported mime type")]400        public async Task PathOptionShouldThrowForUnsupportedMimeType()401        {402            var exception = await PlaywrightAssert.ThrowsAsync<ArgumentException>(() => Page.ScreenshotAsync(new() { Path = "file.txt" }));403            StringAssert.Contains("path: unsupported mime type \"text/plain\"", exception.Message);404        }405    }406}...

PageRequestFulfillTests.cs

Source:PageRequestFulfillTests.cs

...91                document.body.appendChild(img);92                return new Promise(fulfill => img.onload = fulfill);93            }", Server.Prefix);94            var img = await Page.QuerySelectorAsync("img");95            Assert.True(ScreenshotHelper.PixelMatch("mock-binary-response.png", await img.ScreenshotAsync()));96        }97        [PlaywrightTest("page-request-fulfill.spec.ts", "should allow mocking svg with charset")]98        [Ignore("We need screenshots for this")]99        public void ShouldAllowMockingSvgWithCharset()100        {101        }102        [PlaywrightTest("page-request-fulfill.spec.ts", "should work with file path")]103        [Ignore("We need screenshots for this")]104        public async Task ShouldWorkWithFilePath()105        {106            await Page.RouteAsync("**/*", (route) =>107            {108                route.FulfillAsync(new()109                {110                    ContentType = "shouldBeIgnored",111                    Path = TestUtils.GetAsset("pptr.png"),112                });113            });114            await Page.EvaluateAsync(@"PREFIX => {115                const img = document.createElement('img');116                img.src = PREFIX + '/does-not-exist.png';117                document.body.appendChild(img);118                return new Promise(fulfill => img.onload = fulfill);119            }", Server.Prefix);120            var img = await Page.QuerySelectorAsync("img");121            Assert.True(ScreenshotHelper.PixelMatch("mock-binary-response.png", await img.ScreenshotAsync()));122        }123        [PlaywrightTest("page-request-fulfill.spec.ts", "should stringify intercepted request response headers")]124        public async Task ShouldStringifyInterceptedRequestResponseHeaders()125        {126            await Page.RouteAsync("**/*", (route) =>127            {128                route.FulfillAsync(new()129                {130                    Status = (int)HttpStatusCode.OK,131                    Headers = new Dictionary<string, string>132                    {133                        ["foo"] = "true"134                    },135                    Body = "Yo, page!",...

ScreenshotHelper.cs

Source:ScreenshotHelper.cs

...26using SixLabors.ImageSharp;27using SixLabors.ImageSharp.PixelFormats;28namespace Microsoft.Playwright.Tests29{30    internal class ScreenshotHelper31    {32        internal static bool PixelMatch(string screenShotFile, string fileName)33            => PixelMatch(screenShotFile, File.ReadAllBytes(fileName));34        internal static bool PixelMatch(string screenShotFile, byte[] screenshot)35        {36            const int pixelThreshold = 10;37            const decimal totalTolerance = 0.05m;38            var baseImage = Image.Load<Rgb24>(Path.Combine(TestUtils.FindParentDirectory("Screenshots"), TestConstants.BrowserName, screenShotFile));39            var compareImage = Image.Load<Rgb24>(screenshot);40            //Just for debugging purpose41            compareImage.Save(Path.Combine(TestUtils.FindParentDirectory("Screenshots"), TestConstants.BrowserName, "test.png"));42            if (baseImage.Width != compareImage.Width || baseImage.Height != compareImage.Height)43            {44                return false;...

ScreenshotHelper

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using System;3{4    {5        static void Main(string[] args)6        {7            ScreenshotHelper screenshotHelper = new ScreenshotHelper();8            screenshotHelper.TakeScreenshot();9        }10    }11}12using Microsoft.Playwright;13using System;14using System.Collections.Generic;15using System.Text;16using System.Threading.Tasks;17{18    {19        public async Task TakeScreenshot()20        {21            var playwright = await Playwright.CreateAsync();22            var browser = await playwright.Chromium.LaunchAsync();23            var page = await browser.NewPageAsync();24            await page.ScreenshotAsync("google.png");25            await browser.CloseAsync();26        }27    }28}29using Microsoft.Playwright;30using System;31using System.Collections.Generic;32using System.Text;33using System.Threading.Tasks;34{35    {36        public async Task TakeScreenshot()37        {38            var playwright = await Playwright.CreateAsync();39            var browser = await playwright.Chromium.LaunchAsync();40            var page = await browser.NewPageAsync();41            await page.ScreenshotAsync("google.png");42            await browser.CloseAsync();43        }44    }45}

ScreenshotHelper

Using AI Code Generation

1ScreenshotHelper screenshotHelper = new ScreenshotHelper();2screenshotHelper.TakeScreenshot(page, "2.png");3ScreenshotHelper screenshotHelper = new ScreenshotHelper();4screenshotHelper.TakeScreenshot(page, "3.png");5ScreenshotHelper screenshotHelper = new ScreenshotHelper();6screenshotHelper.TakeScreenshot(page, "4.png");7ScreenshotHelper screenshotHelper = new ScreenshotHelper();8screenshotHelper.TakeScreenshot(page, "5.png");9ScreenshotHelper screenshotHelper = new ScreenshotHelper();10screenshotHelper.TakeScreenshot(page, "6.png");11ScreenshotHelper screenshotHelper = new ScreenshotHelper();12screenshotHelper.TakeScreenshot(page, "7.png");13ScreenshotHelper screenshotHelper = new ScreenshotHelper();14screenshotHelper.TakeScreenshot(page, "8.png");15ScreenshotHelper screenshotHelper = new ScreenshotHelper();16screenshotHelper.TakeScreenshot(page, "9.png");17ScreenshotHelper screenshotHelper = new ScreenshotHelper();18screenshotHelper.TakeScreenshot(page, "10.png");19ScreenshotHelper screenshotHelper = new ScreenshotHelper();20screenshotHelper.TakeScreenshot(page, "11.png");21ScreenshotHelper screenshotHelper = new ScreenshotHelper();22screenshotHelper.TakeScreenshot(page, "12.png");23ScreenshotHelper screenshotHelper = new ScreenshotHelper();24screenshotHelper.TakeScreenshot(page, "13.png");

ScreenshotHelper

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Playwright.CreateAsync().Chromium.LaunchAsync();9            var page = await browser.NewPageAsync();10            await page.ScreenshotAsync("google.png");11            await browser.CloseAsync();12        }13    }14}15Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "2", "2.csproj", "{7D9F2C3F-1E0D-4B6F-8B0E-6B2B6C4C4B4B}"16	GlobalSection(SolutionConfigurationPlatforms) = preSolution17	GlobalSection(ProjectConfigurationPlatforms) = postSolution18		{7D9F2C3F-1E0D-4B6F-8B0E-6B2B6C4C4B4B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU19		{7D9F2C3F-1E0D-4B6F-8B0E-6B2B6C4C4B4B}.Debug|Any CPU.Build.0 = Debug|Any CPU20		{7D9

ScreenshotHelper

Using AI Code Generation

1using Microsoft.Playwright.Tests;2ScreenshotHelper screenshotHelper = new ScreenshotHelper();3screenshotHelper.TakeScreenshot("2");4using Microsoft.Playwright.Tests;5ScreenshotHelper screenshotHelper = new ScreenshotHelper();6screenshotHelper.TakeScreenshot("3");

ScreenshotHelper

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using NUnit.Framework;3using System;4using System.Collections.Generic;5using System.IO;6using System.Text;7{8    {9        public async void Test1()10        {11            using var playwright = await Playwright.CreateAsync();12            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions13            {14                Args = new[] { "--no-sandbox" }15            });16            var page = await browser.NewPageAsync();17            await page.ScreenshotAsync(new PageScreenshotOptions18            {19            });20            await browser.CloseAsync();21        }22    }23}24using Microsoft.Playwright.Tests;25using NUnit.Framework;26using System;27using System.Collections.Generic;28using System.IO;29using System.Text;30{31    {32        public async void Test1()33        {34            using var playwright = await Playwright.CreateAsync();35            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions36            {37                Args = new[] { "--no-sandbox" }38            });39            var page = await browser.NewPageAsync();40            var path = Path.Combine(Directory.GetCurrentDirectory(), "Screenshots", "test.png");41            await page.ScreenshotAsync(new PageScreenshotOptions42            {43            });44            await browser.CloseAsync();45        }46    }47}

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.