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How to use ShouldWorkWhenFileInputIsNotAttachedToDOM method of PuppeteerSharp.Tests.InputTests.PageWaitForFileChooserTests class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.InputTests.PageWaitForFileChooserTests.ShouldWorkWhenFileInputIsNotAttachedToDOM

PageWaitForFileChooserTests.cs

Source: PageWaitForFileChooserTests.cs

...21                Page.ClickAsync("input"));22            Assert.NotNull(waitForTask.Result);23        }24        [Fact]25        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()26        {27            var waitForTask = Page.WaitForFileChooserAsync();28            await Task.WhenAll(29                waitForTask,30                Page.EvaluateFunctionAsync(@"() =>31                {32                    const el = document.createElement('input');33                    el.type = 'file';34                    el.click();35                }"));36            Assert.NotNull(waitForTask.Result);37        }38        [Fact]39        public async Task ShouldRespectTimeout()...

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using Xunit;5using Xunit.Abstractions;6{7    [Collection("PuppeteerLoaderFixture collection")]8    {9        public PageWaitForFileChooserTests(ITestOutputHelper output) : base(output)10        {11        }12        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()13        {14            var task = Page.WaitForFileChooserAsync();15            await Page.SetContentAsync($@"16                setTimeout(() => document.querySelector('input').remove(), 1000);17            ");18            await task;19        }20        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOMImmediately()21        {22            var task = Page.WaitForFileChooserAsync();23            await Page.SetContentAsync("<input type=file></input>");24            await Page.QuerySelectorAsync("input").EvaluateFunctionAsync("input => input.remove()");25            await task;26        }27        public async Task ShouldWorkWhenFileInputIsAttachedToDOM()28        {29            await Page.SetContentAsync("<input type=file></input>");30            var fileChooserTask = Page.WaitForFileChooserAsync();31            await Page.QuerySelectorAsync("input").EvaluateFunctionAsync("input => input.click()");32            var fileChooser = await fileChooserTask;33            Assert.NotNull(fileChooser);34        }35        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOMAndFileIsUploaded()36        {37            var tmpFile = Path.GetTempFileName();38            {39                var task = Page.WaitForFileChooserAsync();40                await Page.SetContentAsync("<input type=file></input>");41                await Page.QuerySelectorAsync("input").EvaluateFunctionAsync("input => input.click()");42                var fileChooser = await task;43                await fileChooser.SetFilesAsync(tmpFile);44                Assert.True(await Page.EvaluateFunctionAsync<bool>("e => e.files[0].name === 'foo.txt'", fileChooser.Element));45            }46            {

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1      System.AggregateException : One or more errors occurred. (Object reference not set to an instance of an object.)2           at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)3           at PuppeteerSharp.Tests.InputTests.PageWaitForFileChooserTests.ShouldWorkWhenFileInputIsNotAttachedToDOM() in /_/lib/PuppeteerSharp.Tests/InputTests/PageWaitForFileChooserTests.cs:line 524           at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()5           at Xunit.Sdk.ExceptionAggregator.RethrowWithNoStackTraceLoss()6           at Xunit.Sdk.ExceptionAggregator.ToException()7           at Xunit.Sdk.TestInvoker`2.InvokeTestMethodAsync(ExceptionAggregator aggregator)8           at Xunit.Sdk.TestInvoker`2.InvokeTestAsync()9           at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction)10           at Xunit.Sdk.ExceptionAggregator.RethrowWithNoStackTraceLoss()11           at Xunit.Sdk.ExceptionAggregator.ToException()12           at Xunit.Sdk.TestCaseRunner`1.RunTestAsync()13           at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction)14           at Xunit.Sdk.ExceptionAggregator.RethrowWithNoStackTraceLoss()15           at Xunit.Sdk.ExceptionAggregator.ToException()16           at Xunit.Sdk.TestCaseRunner`1.RunAsync()17           at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction)18           at Xunit.Sdk.ExceptionAggregator.RethrowWithNoStackTraceLoss()19           at Xunit.Sdk.ExceptionAggregator.ToException()20           at Xunit.Sdk.TestRunner`1.RunTestAsync()21           at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction)22           at Xunit.Sdk.ExceptionAggregator.RethrowWithNoStackTraceLoss()23           at Xunit.Sdk.ExceptionAggregator.ToException()24           at Xunit.Sdk.TestRunner`1.RunAsync()25           at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction)

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6{7    {8        static void Main(string[] args)9        {10            var task = new PuppeteerSharp.Tests.InputTests.PageWaitForFileChooserTests().ShouldWorkWhenFileInputIsNotAttachedToDOM();11            task.Wait();12        }13    }14}15{16    using System.Threading.Tasks;17    using Xunit;18    using Xunit.Abstractions;19    [Collection("PuppeteerLoaderFixture collection")]20    {21        public PageWaitForFileChooserTests(ITestOutputHelper output) : base(output)22        {23        }24        [Fact(Timeout = PuppeteerSharp.Puppeteer.DefaultTimeout)]25        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()26        {27            await Page.SetContentAsync(@"28            ");29            var (fileChooser, _) = await TaskUtils.WhenAll(30                Page.WaitForFileChooserAsync(),31                Page.EvaluateFunctionAsync("() => setTimeout(() => document.getElementById('file').click(), 50)"));32            Assert.NotNull(fileChooser);33            await fileChooser.SetFilesAsync(TestConstants.FileToUpload);34            Assert.Equal(TestConstants.FileToUpload, await Page.EvaluateExpressionAsync<string>("window['result']"));35        }36    }37}38Line 17:         public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()39Line 18:         {40Line 19:             await Page.SetContentAsync(@"41Line 21:             ");42Line 22:             var (fileChooser, _) = await TaskUtils.WhenAll(43Line 23:                 Page.WaitForFileChooserAsync(),44Line 24:                 Page.EvaluateFunctionAsync("() => setTimeout(() => document.getElementById('file').click(), 50)"));45Line 25:             Assert.NotNull(fileChooser);46Line 26:             await fileChooser.SetFilesAsync(TestConstants.FileToUpload);

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1using System;2using System.Linq;3using System.Threading.Tasks;4using NUnit.Framework;5using PuppeteerSharp.Helpers;6{7    {8        public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()9        {10            await Page.GoToAsync(TestConstants.ServerUrl + "/input/fileupload.html");11            var waitForFileChooserTask = Page.WaitForFileChooserAsync();12            await Task.WhenAll(13                Page.EvaluateFunctionAsync("() => { var input = document.createElement('input'); input.type = 'file'; input.id = 'newfile'; document.body.appendChild(input); }")14            );15            var fileChooser = waitForFileChooserTask.Result;16            var filePath = TestUtils.GetWebServerFile("pptr.png");17            await fileChooser.SetFilesAsync(filePath);18            var result = await Page.EvaluateExpressionAsync<string>("result");19            Assert.AreEqual(filePath, result);20        }21    }22}23{24    {25        public MissingMemberException();26        public MissingMemberException(string message);27        public MissingMemberException(string message, Exception inner);28    }29}

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1await page.SetContentAsync(@"2");3await page.SetContentAsync(@"4");5await page.SetContentAsync(@"6");7await page.SetContentAsync(@"8");9await page.SetContentAsync(@"10");11await page.SetContentAsync(@"12");13await page.SetContentAsync(@"14");15await page.SetContentAsync(@"16");17await page.SetContentAsync(@"18");19await page.SetContentAsync(@"20");21await page.SetContentAsync(@"22");23await page.SetContentAsync(@"24");25await page.SetContentAsync(@"26");

ShouldWorkWhenFileInputIsNotAttachedToDOM

Using AI Code Generation

1public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()2{3    var filePath = Path.Combine(Directory.GetCurrentDirectory(), "assets", "pptr.png");4    await Page.SetContentAsync($@"");5    await Page.EvaluateExpressionAsync(@"() => {6        const input = document.createElement('input');7        input.type = 'file';8        document.body.appendChild(input);9        return input;10    }");11    var chooser = await Page.WaitForFileChooserAsync();12    await chooser.SetFilesAsync(filePath);13    Assert.Equal(filePath, chooser.Files[0]);14}15public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()16{17    var filePath = Path.Combine(Directory.GetCurrentDirectory(), "assets", "pptr.png");18    await Page.SetContentAsync($@"");19    await Page.EvaluateExpressionAsync(@"() => {20        const input = document.createElement('input');21        input.type = 'file';22        document.body.appendChild(input);23        return input;24    }");25    var chooser = await Page.WaitForFileChooserAsync();26    await chooser.SetFilesAsync(filePath);27    Assert.Equal(filePath, chooser.Files[0]);28}29public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()30{31    var filePath = Path.Combine(Directory.GetCurrentDirectory(), "assets", "pptr.png");32    await Page.SetContentAsync($@"");33    await Page.EvaluateExpressionAsync(@"() => {34        const input = document.createElement('input');35        input.type = 'file';36        document.body.appendChild(input);37        return input;38    }");39    var chooser = await Page.WaitForFileChooserAsync();40    await chooser.SetFilesAsync(filePath);41    Assert.Equal(filePath, chooser.Files[0]);42}43public async Task ShouldWorkWhenFileInputIsNotAttachedToDOM()44{45    var filePath = Path.Combine(Directory.GetCurrentDirectory(), "assets", "pptr.png");46    await Page.SetContentAsync($

StackOverFlow community discussions

Questions

Discussion

Browser like experience on a .Net Server

PuppeteerSharp throws ChromiumProcessException "Failed to create connection" when launching a browser

Convert HTML string to image

Download image from page with Puppeteersharp

How I can use PuppeteerSharp to click on Cookie Accept Button

download file on the user's side

Why Puppeteer not working in Brave™ portable?

How to generate images of web pages in a high performance environment?

Thread safety of LaunchAsync() in Puppeteer

Can I use the ScreenshotAsync method to save the screenshot to memory instead of disk?

I found the solution to server side rendering of js and css on DOM files with chromium. Chrome can be run as headless providing the capability to render in the backend without it's UI. There's a library than can be used to drive chromium call peppetteer for Node js and PuppeteerSharp for .Net. Under .Net u can get it as Nuget Package and as for Node js its on npm .

https://github.com/kblok/puppeteer-sharp for PuppeteerSharp

https://stackoverflow.com/questions/53570866/browser-like-experience-on-a-net-server

Thanks all for your responses. I used HtmlRenderer external dll (library) to achieve the same and found below code for the same.

Here is the code for this

public void ConvertHtmlToImage()
{
   Bitmap m_Bitmap = new Bitmap(400, 600);
   PointF point = new PointF(0, 0);
   SizeF maxSize = new System.Drawing.SizeF(500, 500);
   HtmlRenderer.HtmlRender.Render(Graphics.FromImage(m_Bitmap),
                                           "<html><body><p>This is some html code</p>"
                                           + "<p>This is another html line</p></body>",
                                            point, maxSize);

   m_Bitmap.Save(@"C:\Test.png", ImageFormat.Png);
}

https://stackoverflow.com/questions/17832304/convert-html-string-to-image

If anyone needs it, here is the code I used below :

        Base64Image img = new Base64Image();            
        using (Page page = await parentPage.Browser.NewPageAsync())
        {                
            var tcs = new TaskCompletionSource();
            page.Response += async (sender, e) =>
            {
                string contentType = null;
                string[] imageMimeTypes = { "image/jpeg", "image/png", "image/webp", "image/gif" };

                if (e.Response.Headers.ContainsKey("content-type"))
                    contentType = (string)e.Response.Headers["content-type"].ToLower();

                if (e.Response.Headers.ContainsKey("Content-Type"))
                    contentType = (string)e.Response.Headers["Content-Type"].ToLower();

                if (imageMimeTypes.Any(t => t == contentType))
                {
                    img.ContentType = contentType;
                    

                    await e.Response.BufferAsync().AsTask().ContinueWith(async (data) => img.Bytes = await data);   
                    tcs.TrySetResult();
                }
            };
            await Task.WhenAll(page.GoToAsync(uri.AbsoluteUri), tcs.Task);
            await page.CloseAsync();
        }
        return img;

https://stackoverflow.com/questions/65372341/download-image-from-page-with-puppeteersharp

I guess you can use the class KnownFolders from here

https://www.codeproject.com/Articles/878605/Getting-All-Special-Folders-in-NET

and then on the client side make something like that

var client = new WebClient();
client.DownloadFile(fileName, Path.Combine(KnownFolders.GetPath(KnownFolder.Downloads), $"{id}.pdf"));

https://stackoverflow.com/questions/72726114/download-file-on-the-users-side

Although there are still many improvements going on, Puppeteer-Sharp is thread-safe. To improve loading performance, there are a few approaches you can take.

Launch one browser and then connect to it

You can launch one (real) browser and then use the ConnectAsync method to connect to it.

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = false,
});

var theBrowser1 = await Puppeteer.ConnectAsync(new ConnectOptions { BrowserWSEndpoint = browser.WebSocketEndpoint });
var theBrowser2 = await Puppeteer.ConnectAsync(new ConnectOptions { BrowserWSEndpoint = browser.WebSocketEndpoint });
var page1 = await theBrowser1.NewPageAsync();
var page2 = await theBrowser2.NewPageAsync();

await Task.WhenAll(
    page1.GoToAsync("https://www.stackoverflow.com"),
    page2.GoToAsync("https://serverfault.com/")
);

I know that code is not running in parallel, but you'll get the idea about reusing the same browser.

Create new pages on the same browser

If you are using TPL, you shouldn't have any issues creating new pages from different threads using the same browser.

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = false,
});

var urls = new string[]
{
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com"
};

await Task.WhenAll(
    urls.Select(url => Task.Factory.StartNew(async () =>
    {
        var page = await browser.NewPageAsync();
        return page.GoToAsync(url);
    })));

Again, this example is just to give you an idea of how this could be accomplished.

Pages queue

There is one user who created a queue of X pages (for x from 0 to X => NewPage) and then he would grab pages from that queue. You can see the example here.

https://stackoverflow.com/questions/54776367/how-to-generate-images-of-web-pages-in-a-high-performance-environment

According to the docs you have ScreenShotDataAsync which returns a byte[]:

byte[] data = await page.ScreenshotDataAsync(scrOpts);

There's also ScreenshotStreamAsync which returns a Stream:

Stream stream = await page.ScreenshotStreamAsync(scrOpts);

https://stackoverflow.com/questions/68904121/can-i-use-the-screenshotasync-method-to-save-the-screenshot-to-memory-instead-of

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