Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use ScreenshotHelper class of PuppeteerSharp.Tests package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.ScreenshotHelper

PageScreenshotTests.cs

Source:PageScreenshotTests.cs

...34                }35                await page.ScreenshotAsync(outputFile);36                fileInfo = new FileInfo(outputFile);37                Assert.True(new FileInfo(outputFile).Length > 0);38                Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", outputFile));39                if (fileInfo.Exists)40                {41                    fileInfo.Delete();42                }43            }44        }45        [PuppeteerFact(Timeout = -1)]46        public async Task Usage()47        {48            var outputFile = Path.Combine(BaseDirectory, "Usage.png");49            var fileInfo = new FileInfo(outputFile);50            if (fileInfo.Exists)51            {52                fileInfo.Delete();53            }54            #region ScreenshotAsync55            using var browserFetcher = new BrowserFetcher();56            await browserFetcher.DownloadAsync();57            await using var browser = await Puppeteer.LaunchAsync(58                new LaunchOptions { Headless = true });59            await using var page = await browser.NewPageAsync();60            await page.GoToAsync("http://www.google.com");61            await page.ScreenshotAsync(outputFile);62            #endregion63            Assert.True(File.Exists(outputFile));64        }65        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should work")]66        [SkipBrowserFact(skipFirefox: true)]67        public async Task ShouldWork()68        {69            await using (var page = await Context.NewPageAsync())70            {71                await page.SetViewportAsync(new ViewPortOptions72                {73                    Width = 500,74                    Height = 50075                });76                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");77                var screenshot = await page.ScreenshotDataAsync();78                Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", screenshot));79            }80        }81        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should clip rect")]82        [PuppeteerFact]83        public async Task ShouldClipRect()84        {85            await using (var page = await Context.NewPageAsync())86            {87                await page.SetViewportAsync(new ViewPortOptions88                {89                    Width = 500,90                    Height = 50091                });92                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");93                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions94                {95                    Clip = new Clip96                    {97                        X = 50,98                        Y = 100,99                        Width = 150,100                        Height = 100101                    }102                });103                Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-rect.png", screenshot));104            }105        }106        [PuppeteerFact]107        public async Task ShouldClipScale()108        {109            await using (var page = await Context.NewPageAsync())110            {111                await page.SetViewportAsync(new ViewPortOptions112                {113                    Width = 500,114                    Height = 500115                });116                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");117                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions118                {119                    Clip = new Clip120                    {121                        X = 50,122                        Y = 100,123                        Width = 150,124                        Height = 100,125                        Scale = 2126                    }127                });128                Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-rect-scale.png", screenshot));129            }130        }131        [SkipBrowserFact(skipFirefox: true)]132        public async Task ShouldClipElementsToTheViewport()133        {134            await using (var page = await Context.NewPageAsync())135            {136                await page.SetViewportAsync(new ViewPortOptions { Width = 500, Height = 500 });137                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");138                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions139                {140                    Clip = new Clip141                    {142                        X = 50,143                        Y = 600,144                        Width = 100,145                        Height = 100146                    }147                });148                Assert.True(ScreenshotHelper.PixelMatch("screenshot-offscreen-clip.png", screenshot));149            }150        }151        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should run in parallel")]152        [PuppeteerFact]153        public async Task ShouldRunInParallel()154        {155            await using (var page = await Context.NewPageAsync())156            {157                await page.SetViewportAsync(new ViewPortOptions158                {159                    Width = 500,160                    Height = 500161                });162                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");163                var tasks = new List<Task<byte[]>>();164                for (var i = 0; i < 3; ++i)165                {166                    tasks.Add(page.ScreenshotDataAsync(new ScreenshotOptions167                    {168                        Clip = new Clip169                        {170                            X = 50 * i,171                            Y = 0,172                            Width = 50,173                            Height = 50174                        }175                    }));176                }177                await Task.WhenAll(tasks);178                Assert.True(ScreenshotHelper.PixelMatch("grid-cell-1.png", tasks[0].Result));179            }180        }181        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should take fullPage screenshots")]182        [SkipBrowserFact(skipFirefox: true)]183        public async Task ShouldTakeFullPageScreenshots()184        {185            await using (var page = await Context.NewPageAsync())186            {187                await page.SetViewportAsync(new ViewPortOptions188                {189                    Width = 500,190                    Height = 500191                });192                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");193                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions194                {195                    FullPage = true196                });197                Assert.True(ScreenshotHelper.PixelMatch("screenshot-grid-fullpage.png", screenshot));198            }199        }200        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should run in parallel in multiple pages")]201        [SkipBrowserFact(skipFirefox: true)]202        public async Task ShouldRunInParallelInMultiplePages()203        {204            var n = 2;205            var pageTasks = new List<Task<Page>>();206            for (var i = 0; i < n; i++)207            {208                async Task<Page> func()209                {210                    var page = await Context.NewPageAsync();211                    await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");212                    return page;213                }214                pageTasks.Add(func());215            }216            await Task.WhenAll(pageTasks);217            var screenshotTasks = new List<Task<byte[]>>();218            for (var i = 0; i < n; i++)219            {220                screenshotTasks.Add(pageTasks[i].Result.ScreenshotDataAsync(new ScreenshotOptions221                {222                    Clip = new Clip223                    {224                        X = 50 * i,225                        Y = 0,226                        Width = 50,227                        Height = 50228                    }229                }));230            }231            await Task.WhenAll(screenshotTasks);232            for (var i = 0; i < n; i++)233            {234                Assert.True(ScreenshotHelper.PixelMatch($"grid-cell-{i}.png", screenshotTasks[i].Result));235            }236            var closeTasks = new List<Task>();237            for (var i = 0; i < n; i++)238            {239                closeTasks.Add(pageTasks[i].Result.CloseAsync());240            }241            await Task.WhenAll(closeTasks);242        }243        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should allow transparency")]244        [SkipBrowserFact(skipFirefox: true)]245        public async Task ShouldAllowTransparency()246        {247            await using (var page = await Context.NewPageAsync())248            {249                await page.SetViewportAsync(new ViewPortOptions250                {251                    Width = 100,252                    Height = 100253                });254                await page.GoToAsync(TestConstants.EmptyPage);255                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions256                {257                    OmitBackground = true258                });259                Assert.True(ScreenshotHelper.PixelMatch("transparent.png", screenshot));260            }261        }262        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should render white background on jpeg file")]263        [SkipBrowserFact(skipFirefox: true)]264        public async Task ShouldRenderWhiteBackgroundOnJpegFile()265        {266            await using (var page = await Context.NewPageAsync())267            {268                await page.SetViewportAsync(new ViewPortOptions { Width = 100, Height = 100 });269                await page.GoToAsync(TestConstants.EmptyPage);270                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions271                {272                    OmitBackground = true,273                    Type = ScreenshotType.Jpeg274                });275                Assert.True(ScreenshotHelper.PixelMatch("white.jpg", screenshot));276            }277        }278        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should work with odd clip size on Retina displays")]279        [PuppeteerFact]280        public async Task ShouldWorkWithOddClipSizeOnRetinaDisplays()281        {282            await using (var page = await Context.NewPageAsync())283            {284                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions285                {286                    Clip = new Clip287                    {288                        X = 0,289                        Y = 0,290                        Width = 11,291                        Height = 11292                    }293                });294                Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-odd-size.png", screenshot));295            }296        }297        [PuppeteerTest("screenshot.spec.ts", "Page.screenshot", "should return base64")]298        [SkipBrowserFact(skipFirefox: true)]299        public async Task ShouldReturnBase64()300        {301            await using (var page = await Context.NewPageAsync())302            {303                await page.SetViewportAsync(new ViewPortOptions304                {305                    Width = 500,306                    Height = 500307                });308                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");309                var screenshot = await page.ScreenshotBase64Async();310                Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", Convert.FromBase64String(screenshot)));311            }312        }313        [PuppeteerFact]314        public void ShouldInferScreenshotTypeFromName()315        {316            Assert.Equal(ScreenshotType.Jpeg, ScreenshotOptions.GetScreenshotTypeFromFile("Test.jpg"));317            Assert.Equal(ScreenshotType.Jpeg, ScreenshotOptions.GetScreenshotTypeFromFile("Test.jpe"));318            Assert.Equal(ScreenshotType.Jpeg, ScreenshotOptions.GetScreenshotTypeFromFile("Test.jpeg"));319            Assert.Equal(ScreenshotType.Png, ScreenshotOptions.GetScreenshotTypeFromFile("Test.png"));320            Assert.Null(ScreenshotOptions.GetScreenshotTypeFromFile("Test.exe"));321        }322        [SkipBrowserFact(skipFirefox: true)]323        public async Task ShouldWorkWithQuality()324        {325            await using (var page = await Context.NewPageAsync())326            {327                await page.SetViewportAsync(new ViewPortOptions328                {329                    Width = 500,330                    Height = 500331                });332                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");333                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions334                {335                    Type = ScreenshotType.Jpeg,336                    FullPage = true,337                    Quality = 100338                });339                Assert.True(ScreenshotHelper.PixelMatch("screenshot-grid-fullpage.png", screenshot));340            }341        }342    }343}...

ScreenshotTests.cs

Source:ScreenshotTests.cs

...32                }33                await page.ScreenshotAsync(outputFile);34                fileInfo = new FileInfo(outputFile);35                Assert.True(new FileInfo(outputFile).Length > 0);36                Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", outputFile));37                if (fileInfo.Exists)38                {39                    fileInfo.Delete();40                }41            }42        }43        [Fact]44        public async Task ShouldWork()45        {46            using (var page = await Browser.NewPageAsync())47            {48                await page.SetViewportAsync(new ViewPortOptions49                {50                    Width = 500,51                    Height = 50052                });53                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");54                var screenshot = await page.ScreenshotDataAsync();55                Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", screenshot));56            }57        }58        [Fact]59        public async Task ShouldClipRect()60        {61            using (var page = await Browser.NewPageAsync())62            {63                await page.SetViewportAsync(new ViewPortOptions64                {65                    Width = 500,66                    Height = 50067                });68                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");69                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions70                {71                    Clip = new Clip72                    {73                        X = 50,74                        Y = 100,75                        Width = 150,76                        Height = 10077                    }78                });79                Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-rect.png", screenshot));80            }81        }82        [Fact]83        public async Task ShouldWorkForOffscreenClip()84        {85            using (var page = await Browser.NewPageAsync())86            {87                await page.SetViewportAsync(new ViewPortOptions88                {89                    Width = 500,90                    Height = 50091                });92                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");93                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions94                {95                    Clip = new Clip96                    {97                        X = 50,98                        Y = 600,99                        Width = 100,100                        Height = 100101                    }102                });103                Assert.True(ScreenshotHelper.PixelMatch("screenshot-offscreen-clip.png", screenshot));104            }105        }106        [Fact]107        public async Task ShouldRunInParallel()108        {109            using (var page = await Browser.NewPageAsync())110            {111                await page.SetViewportAsync(new ViewPortOptions112                {113                    Width = 500,114                    Height = 500115                });116                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");117                var tasks = new List<Task<byte[]>>();118                for (var i = 0; i < 3; ++i)119                {120                    tasks.Add(page.ScreenshotDataAsync(new ScreenshotOptions121                    {122                        Clip = new Clip123                        {124                            X = 50 * i,125                            Y = 0,126                            Width = 50,127                            Height = 50128                        }129                    }));130                }131                await Task.WhenAll(tasks);132                Assert.True(ScreenshotHelper.PixelMatch("grid-cell-1.png", tasks[0].Result));133            }134        }135        [Fact]136        public async Task ShouldTakeFullPageScreenshots()137        {138            using (var page = await Browser.NewPageAsync())139            {140                await page.SetViewportAsync(new ViewPortOptions141                {142                    Width = 500,143                    Height = 500144                });145                await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");146                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions147                {148                    FullPage = true149                });150                Assert.True(ScreenshotHelper.PixelMatch("screenshot-grid-fullpage.png", screenshot));151            }152        }153        [Fact]154        public async Task ShouldRunInParallelInMultiplePages()155        {156            var n = 2;157            var pageTasks = new List<Task<Page>>();158            for (var i = 0; i < n; i++)159            {160                Func<Task<Page>> func = async () =>161                {162                    var page = await Browser.NewPageAsync();163                    await page.GoToAsync(TestConstants.ServerUrl + "/grid.html");164                    return page;165                };166                pageTasks.Add(func());167            }168            await Task.WhenAll(pageTasks);169            var screenshotTasks = new List<Task<byte[]>>();170            for (var i = 0; i < n; i++)171            {172                screenshotTasks.Add(pageTasks[i].Result.ScreenshotDataAsync(new ScreenshotOptions173                {174                    Clip = new Clip175                    {176                        X = 50 * i,177                        Y = 0,178                        Width = 50,179                        Height = 50180                    }181                }));182            }183            await Task.WhenAll(screenshotTasks);184            for (var i = 0; i < n; i++)185            {186                Assert.True(ScreenshotHelper.PixelMatch($"grid-cell-{i}.png", screenshotTasks[i].Result));187            }188            var closeTasks = new List<Task>();189            for (var i = 0; i < n; i++)190            {191                closeTasks.Add(pageTasks[i].Result.CloseAsync());192            }193            await Task.WhenAll(closeTasks);194        }195        [Fact]196        public async Task ShouldAllowTransparency()197        {198            using (var page = await Browser.NewPageAsync())199            {200                await page.SetViewportAsync(new ViewPortOptions201                {202                    Width = 100,203                    Height = 100204                });205                await page.GoToAsync(TestConstants.EmptyPage);206                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions207                {208                    OmitBackground = true209                });210                Assert.True(ScreenshotHelper.PixelMatch("transparent.png", screenshot));211            }212        }213        [Fact]214        public async Task ShouldWorkWithOddClipSizeOnRetinaDisplays()215        {216            using (var page = await Browser.NewPageAsync())217            {218                var screenshot = await page.ScreenshotDataAsync(new ScreenshotOptions219                {220                    Clip = new Clip221                    {222                        X = 0,223                        Y = 0,224                        Width = 11,225                        Height = 11226                    }227                });228                Assert.True(ScreenshotHelper.PixelMatch("screenshot-clip-odd-size.png", screenshot));229            }230        }231    }232}...

RequestRespondTests.cs

Source:RequestRespondTests.cs

...106                document.body.appendChild(img);107                return new Promise(fulfill => img.onload = fulfill);108            }", TestConstants.ServerUrl);109            var img = await Page.QuerySelectorAsync("img");110            Assert.True(ScreenshotHelper.PixelMatch("mock-binary-response.png", await img.ScreenshotDataAsync()));111        }112        [PuppeteerTest("requestinterception.spec.ts", "Request.respond", "should stringify intercepted request response headers")]113        [SkipBrowserFact(skipFirefox: true)]114        public async Task ShouldStringifyInterceptedRequestResponseHeaders()115        {116            await Page.SetRequestInterceptionAsync(true);117            Page.Request += async (_, e) =>118            {119                await e.Request.RespondAsync(new ResponseData120                {121                    Status = HttpStatusCode.OK,122                    Headers = new Dictionary<string, object>123                    {124                        ["foo"] = true...

ElementHandleScreenshotTests.cs

Source:ElementHandleScreenshotTests.cs

...26            await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");27            await Page.EvaluateExpressionAsync("window.scrollBy(50, 100)");28            var elementHandle = await Page.QuerySelectorAsync(".box:nth-of-type(3)");29            var screenshot = await elementHandle.ScreenshotDataAsync();30            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-bounding-box.png", screenshot));31        }32        [PuppeteerTest("screenshot.spec.ts", "ElementHandle.screenshot", "should take into account padding and border")]33        [PuppeteerFact]34        public async Task ShouldTakeIntoAccountPaddingAndBorder()35        {36            await Page.SetViewportAsync(new ViewPortOptions37            {38                Width = 500,39                Height = 50040            });41            await Page.SetContentAsync(@"42                something above43                <style> div {44                    border: 2px solid blue;45                    background: green;46                    width: 50px;47                    height: 50px;48                }49                </style>50                <div></div>51            ");52            var elementHandle = await Page.QuerySelectorAsync("div");53            var screenshot = await elementHandle.ScreenshotDataAsync();54            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-padding-border.png", screenshot));55        }56        [PuppeteerTest("screenshot.spec.ts", "ElementHandle.screenshot", "should capture full element when larger than viewport")]57        [SkipBrowserFact(skipFirefox: true)]58        public async Task ShouldCaptureFullElementWhenLargerThanViewport()59        {60            await Page.SetViewportAsync(new ViewPortOptions61            {62                Width = 500,63                Height = 50064            });65            await Page.SetContentAsync(@"66                something above67                <style>68                div.to-screenshot {69                  border: 1px solid blue;70                  width: 600px;71                  height: 600px;72                  margin-left: 50px;73                }74                ::-webkit-scrollbar{75                  display: none;76                }77                </style>78                <div class='to-screenshot'></div>"79            );80            var elementHandle = await Page.QuerySelectorAsync("div.to-screenshot");81            var screenshot = await elementHandle.ScreenshotDataAsync();82            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-larger-than-viewport.png", screenshot));83            Assert.Equal(JToken.FromObject(new { w = 500, h = 500 }),84                await Page.EvaluateExpressionAsync("({ w: window.innerWidth, h: window.innerHeight })"));85        }86        [PuppeteerFact]87        public async Task ShouldScrollElementIntoView()88        {89            await Page.SetViewportAsync(new ViewPortOptions90            {91                Width = 500,92                Height = 50093            });94            await Page.SetContentAsync(@"95                something above96                <style> div.above {97                    border: 2px solid blue;98                    background: red;99                    height: 1500px;100                }101                div.to-screenshot {102                    border: 2px solid blue;103                    background: green;104                    width: 50px;105                    height: 50px;106                }107                </style>108                <div class='above'></div>109                <div class='to-screenshot'></div>110            ");111            var elementHandle = await Page.QuerySelectorAsync("div.to-screenshot");112            var screenshot = await elementHandle.ScreenshotDataAsync();113            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-scrolled-into-view.png", screenshot));114        }115        [PuppeteerFact]116        public async Task ShouldWorkWithARotatedElement()117        {118            await Page.SetViewportAsync(new ViewPortOptions119            {120                Width = 500,121                Height = 500122            });123            await Page.SetContentAsync(@"124                <div style='position: absolute;125                top: 100px;126                left: 100px;127                width: 100px;128                height: 100px;129                background: green;130                transform: rotateZ(200deg); '>&nbsp;</div>131            ");132            var elementHandle = await Page.QuerySelectorAsync("div");133            var screenshot = await elementHandle.ScreenshotDataAsync();134            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-rotate.png", screenshot));135        }136        [SkipBrowserFact(skipFirefox: true)]137        public async Task ShouldFailToScreenshotADetachedElement()138        {139            await Page.SetContentAsync("<h1>remove this</h1>");140            var elementHandle = await Page.QuerySelectorAsync("h1");141            await Page.EvaluateFunctionAsync("element => element.remove()", elementHandle);142            var exception = await Assert.ThrowsAsync<PuppeteerException>(elementHandle.ScreenshotStreamAsync);143            Assert.Equal("Node is either not visible or not an HTMLElement", exception.Message);144        }145        [PuppeteerFact]146        public async Task ShouldNotHangWithZeroWidthHeightElement()147        {148            await Page.SetContentAsync(@"<div style='width: 50px; height: 0'></div>");149            var elementHandle = await Page.QuerySelectorAsync("div");150            var exception = await Assert.ThrowsAsync<PuppeteerException>(elementHandle.ScreenshotDataAsync);151            Assert.Equal("Node has 0 height.", exception.Message);152        }153        [PuppeteerFact]154        public async Task ShouldWorkForAnElementWithFractionalDimensions()155        {156            await Page.SetContentAsync("<div style=\"width:48.51px;height:19.8px;border:1px solid black;\"></div>");157            var elementHandle = await Page.QuerySelectorAsync("div");158            var screenshot = await elementHandle.ScreenshotDataAsync();159            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-fractional.png", screenshot));160        }161        [SkipBrowserFact(skipFirefox: true)]162        public async Task ShouldWorkForAnElementWithAnOffset()163        {164            await Page.SetContentAsync("<div style=\"position:absolute; top: 10.3px; left: 20.4px;width:50.3px;height:20.2px;border:1px solid black;\"></div>");165            var elementHandle = await Page.QuerySelectorAsync("div");166            var screenshot = await elementHandle.ScreenshotDataAsync();167            Assert.True(ScreenshotHelper.PixelMatch("screenshot-element-fractional-offset.png", screenshot));168        }169    }170}...

PageEmulateVisionDeficiencyTests.cs

Source:PageEmulateVisionDeficiencyTests.cs

...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));26            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.BlurredVision);27            screenshot = await Page.ScreenshotDataAsync();28            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-blurredVision.png", screenshot));29            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Deuteranopia);30            screenshot = await Page.ScreenshotDataAsync();31            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-deuteranopia.png", screenshot));32            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Protanopia);33            screenshot = await Page.ScreenshotDataAsync();34            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-protanopia.png", screenshot));35            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.Tritanopia);36            screenshot = await Page.ScreenshotDataAsync();37            Assert.True(ScreenshotHelper.PixelMatch("vision-deficiency-tritanopia.png", screenshot));38            await Page.EmulateVisionDeficiencyAsync(VisionDeficiency.None);39            screenshot = await Page.ScreenshotDataAsync();40            Assert.True(ScreenshotHelper.PixelMatch("screenshot-sanity.png", screenshot));41        }42    }43}...

RespondTests.cs

Source:RespondTests.cs

...57                document.body.appendChild(img);58                return new Promise(fulfill => img.onload = fulfill);59            }", TestConstants.ServerUrl);60            var img = await Page.QuerySelectorAsync("img");61            Assert.True(ScreenshotHelper.PixelMatch("mock-binary-response.png", await img.ScreenshotDataAsync()));62        }63    }64}...

ScreenshotHelper.cs

Source:ScreenshotHelper.cs

...3using SixLabors.ImageSharp;4using SixLabors.ImageSharp.PixelFormats;5namespace PuppeteerSharp.Tests6{7    public class ScreenshotHelper8    {9        public static bool PixelMatch(string screenShotFile, string fileName)10            => PixelMatch(screenShotFile, File.ReadAllBytes(fileName));11        public static bool PixelMatch(string screenShotFile, byte[] screenshot)12        {13            const int pixelThreshold = 10;14            const decimal totalTolerance = 0.05m;15            var baseImage = Image.Load(Path.Combine(TestUtils.FindParentDirectory("Screenshots"), screenShotFile));16            var compareImage = Image.Load(screenshot);17            //Just  for debugging purpose18            compareImage.Save(Path.Combine(TestUtils.FindParentDirectory("Screenshots"), "test.png"));19            if (baseImage.Width != compareImage.Width || baseImage.Height != compareImage.Height)20            {21                return false;...

Issue0764.cs

Source:Issue0764.cs

...23            };24            await Task.WhenAll(25                Page.GoToAsync(TestConstants.ServerUrl + "/grid.html"),26                tcs.Task);27            Assert.True(ScreenshotHelper.PixelMatch("0.png", await tcs.Task));28        }29    }30}...

ScreenshotHelper

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Tests;5using PuppeteerSharp.Helpers;6{7    {8        static async Task Main(string[] args)9        {10            var browser = await Puppeteer.LaunchAsync(new LaunchOptions11            {12            });13            var page = await browser.NewPageAsync();14            await page.ScreenshotAsync("google.png");15            await ScreenshotHelper.ScreenshotElementAsync(page, "#hplogo", "googlelogo.png");16            await browser.CloseAsync();17        }18    }19}20using System;21using System.Threading.Tasks;22using PuppeteerSharp;23using PuppeteerSharp.Helpers;24{25    {26        static async Task Main(string[] args)27        {28            var browser = await Puppeteer.LaunchAsync(new LaunchOptions29            {30            });31            var page = await browser.NewPageAsync();32            await page.ScreenshotAsync("google.png");33            await ScreenshotHelper.ScreenshotElementAsync(page, "#hplogo", "googlelogo.png");34            await browser.CloseAsync();35        }36    }37}38using System;39using System.Threading.Tasks;40using PuppeteerSharp;41{42    {43        static async Task Main(string[] args)44        {45            var browser = await Puppeteer.LaunchAsync(new LaunchOptions46            {47            });48            var page = await browser.NewPageAsync();49            await page.ScreenshotAsync("google.png");50            await browser.CloseAsync();51        }52    }53}54using System;55using System.Threading.Tasks;56using PuppeteerSharp;57using PuppeteerSharp.Tests;58{59    {60        static async Task Main(string[] args)61        {62            var browser = await Puppeteer.LaunchAsync(new LaunchOptions63            {

ScreenshotHelper

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            Console.WriteLine("Hello World!");9            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });10            var page = await browser.NewPageAsync();11            await page.ScreenshotAsync("google.png");12            await browser.CloseAsync();13        }14    }15}16using PuppeteerSharp;17using System;18using System.Threading.Tasks;19{20    {21        static async Task Main(string[] args)22        {23            Console.WriteLine("Hello World!");24            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });25            var page = await browser.NewPageAsync();26            await page.ScreenshotAsync("google.png");27            await browser.CloseAsync();28        }29    }30}31using PuppeteerSharp;32using System;33using System.Threading.Tasks;34{35    {36        static async Task Main(string[] args)37        {38            Console.WriteLine("Hello World!");39            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });40            var page = await browser.NewPageAsync();41            await page.ScreenshotAsync("google.png");42            await browser.CloseAsync();43        }44    }45}46Error	CS0234	The type or namespace name 'PuppeteerSharp' does not exist in the namespace 'PuppeteerSharp.Tests' (are you missing an assembly reference?)	2.cs

ScreenshotHelper

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using PuppeteerSharp;5using PuppeteerSharp.Tests;6using System.Drawing.Imaging;7using System.Drawing;8using System.Linq;9{10    {11        static async Task Main(string[] args)12        {13            Console.WriteLine("Hello World!");14            {15                Args = new string[] { "--no-sandbox", "--disable-setuid-sandbox" }16            };17            using (var browser = await Puppeteer.LaunchAsync(options))18            {19                using (var page = await browser.NewPageAsync())20                {21                    await page.ScreenshotAsync("screenshot.png", new ScreenshotOptions22                    {23                    });24                }25            }26        }27    }28}

ScreenshotHelper

Using AI Code Generation

1using PuppeteerSharp.Tests;2var screenshotHelper = new ScreenshotHelper();3await screenshotHelper.InitAsync();4await screenshotHelper.TakeScreenshotAsync("google.com", "google.png", new ViewPortOptions { Width = 1920, Height = 1080 });5await screenshotHelper.CloseAsync();6using PuppeteerSharp.Tests;7var screenshotHelper = new ScreenshotHelper();8await screenshotHelper.InitAsync();9await screenshotHelper.TakeScreenshotAsync("google.com", "google.png", new ViewPortOptions { Width = 1920, Height = 1080 });10await screenshotHelper.CloseAsync();

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.