How to use PageEventsConsoleTests class of PuppeteerSharp.Tests.PageTests.Events package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.PageTests.Events.PageEventsConsoleTests

PageEventsConsoleTests.cs

Source: PageEventsConsoleTests.cs Github

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...7using PuppeteerSharp.Xunit;8namespace PuppeteerSharp.Tests.PageTests.Events9{10 [Collection(TestConstants.TestFixtureCollectionName)]11 public class PageEventsConsoleTests : PuppeteerPageBaseTest12 {13 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)14 {15 }16 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work")]17 [SkipBrowserFact(skipFirefox: true)]18 public async Task ShouldWork()19 {20 ConsoleMessage message = null;21 void EventHandler(object sender, ConsoleEventArgs e)22 {23 message = e.Message;24 Page.Console -= EventHandler;25 }26 Page.Console += EventHandler;27 await Page.EvaluateExpressionAsync("console.log('hello', 5, {foo: 'bar'})");...

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PageEventsConsoleTests

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1using PuppeteerSharp.Tests.PageTests.Events;2using Xunit;3using Xunit.Abstractions;4{5 [Collection("PuppeteerLoaderFixture collection")]6 {7 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)8 {9 }10 [Fact(Timeout = TestConstants.DefaultTestTimeout)]11 public async Task ShouldWork()12 {13 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");14 var messages = new List<ConsoleMessage>();15 Page.Console += (sender, e) => messages.Add(e.Message);16 await Page.EvaluateExpressionAsync("log()");17 Assert.Single(messages);18 Assert.Equal("yellow", messages[0].Text);19 }20 [Fact(Timeout = TestConstants.DefaultTestTimeout)]21 public async Task ShouldWorkForDifferentConsoleAPIs()22 {23 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");24 var messages = new List<ConsoleMessage>();25 Page.Console += (sender, e) => messages.Add(e.Message);26 await Page.EvaluateExpressionAsync("console.warn('yellow', 'warn', {foo: 'bar'})");27 await Page.EvaluateExpressionAsync("console.error('red', 'error')");28 await Page.EvaluateExpressionAsync("console.log('green', 'log')");29 await Page.EvaluateExpressionAsync("console.info('blue', 'info')");30 await Page.EvaluateExpressionAsync("console.dir('dir')");31 await Page.EvaluateExpressionAsync("console.dirxml(document.body)");32 await Page.EvaluateExpressionAsync("console.table([{a: 1, b: 'Y'}, {a: 'Z', b: 2}])");33 await Page.EvaluateExpressionAsync("console.trace('trace')");34 await Page.EvaluateExpressionAsync("console.debug('debug')");35 await Page.EvaluateExpressionAsync("console.count('count')");36 await Page.EvaluateExpressionAsync("console.countReset('count')");37 await Page.EvaluateExpressionAsync("console.assert(true, 'whoops')");38 await Page.EvaluateExpressionAsync("console.assert(false, 'whoops')");39 await Page.EvaluateExpressionAsync("console.clear()");40 await Page.EvaluateExpressionAsync("console.timeStamp('foobar')");41 Assert.Equal(13, messages.Count);42 Assert.Equal("yellow warn", messages[0].Text);43 Assert.Equal("red error", messages[1].Text);44 Assert.Equal("green log",

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PageEventsConsoleTests

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1using PuppeteerSharp.Tests.PageTests.Events;2using Xunit;3using Xunit.Abstractions;4{5 {6 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)7 {8 }9 public async Task ShouldWork()10 {11 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");12 Assert.Equal(new[]13 {14 }, await Page.EvaluateExpressionAsync<string[]>("colors"));15 }16 }17}18using PuppeteerSharp.Tests.PageTests.Events;19using Xunit;20using Xunit.Abstractions;21{22 {23 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)24 {25 }26 public async Task ShouldWork()27 {28 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");29 Assert.Equal(new[]30 {31 }, await Page.EvaluateExpressionAsync<string[]>("colors"));32 }33 }34}35using PuppeteerSharp.Tests.PageTests.Events;36using Xunit;37using Xunit.Abstractions;38{39 {40 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)41 {42 }43 public async Task ShouldWork()44 {45 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");46 Assert.Equal(new[]47 {48 }, await Page.EvaluateExpressionAsync<string[]>("colors"));49 }50 }51}52using PuppeteerSharp.Tests.PageTests.Events;53using Xunit;54using Xunit.Abstractions;55{

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PageEventsConsoleTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Tests.PageTests.Events;5{6 {7 static async Task Main(string[] args)8 {9 await PageEventsConsoleTests.PageEventsConsoleTestsMain();10 }11 }12}13using System;14using System.Threading.Tasks;15using PuppeteerSharp;16using PuppeteerSharp.Tests.PageTests.Events;17{18 {19 static async Task Main(string[] args)20 {21 await PageEventsConsoleTests.PageEventsConsoleTestsMain();22 }23 }24}25using System;26using System.Threading.Tasks;27using PuppeteerSharp;28using PuppeteerSharp.Tests.PageTests.Events;29{30 {31 static async Task Main(string[] args)32 {33 await PageEventsConsoleTests.PageEventsConsoleTestsMain();34 }35 }36}37using System;38using System.Threading.Tasks;39using PuppeteerSharp;40using PuppeteerSharp.Tests.PageTests.Events;41{42 {43 static async Task Main(string[] args)44 {45 await PageEventsConsoleTests.PageEventsConsoleTestsMain();46 }47 }48}49using System;50using System.Threading.Tasks;51using PuppeteerSharp;52using PuppeteerSharp.Tests.PageTests.Events;53{54 {55 static async Task Main(string[] args)56 {57 await PageEventsConsoleTests.PageEventsConsoleTestsMain();58 }59 }60}61using System;62using System.Threading.Tasks;63using PuppeteerSharp;64using PuppeteerSharp.Tests.PageTests.Events;65{66 {67 static async Task Main(string[] args)68 {

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PageEventsConsoleTests

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1using PuppeteerSharp.Tests.PageTests.Events;2using System.Threading.Tasks;3{4 {5 public async Task ShouldWork()6 {7 await Page.EvaluateExpressionAsync("() => console.log('yellow', 'text')");8 var msg = await Page.WaitForConsoleMessageAsync();9 Assert.Equal(ConsoleType.Log, msg.Type);10 Assert.Equal("yellow text", msg.Text);11 }12 }13}

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PageEventsConsoleTests

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1using PuppeteerSharp.Tests.PageTests.Events;2using System;3using System.Threading.Tasks;4{5 {6 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work")]7 public async Task ShouldWork()8 {9 Task<ConsoleMessage> task = null;10 Page.Console += (sender, e) => task = Task.FromResult(e.Message);11 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");12 var message = await task;13 Assert.Equal("yellow", message.Text);14 Assert.Equal("warning", message.Type);15 }16 }17}18using PuppeteerSharp.Tests.PageTests.Events;19using System;20using System.Threading.Tasks;21{22 {23 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work for different console API calls")]24 public async Task ShouldWorkForDifferentConsoleAPICalls()25 {26 var messages = new List<ConsoleMessage>();27 Page.Console += (sender, e) => messages.Add(e.Message);28 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");29 Assert.Collection(messages,30 msg => Assert.Equal("yellow", msg.Text),31 msg => Assert.Equal("red", msg.Text)32 );33 }34 }35}36using PuppeteerSharp.Tests.PageTests.Events;37using System;38using System.Threading.Tasks;39{40 {41 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should not fail for window object")]42 public async Task ShouldNotFailForWindowObject()43 {44 var messages = new List<ConsoleMessage>();45 Page.Console += (sender, e) => messages.Add(e.Message);46 await Page.EvaluateFunctionAsync(@"() => {

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PageEventsConsoleTests

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1using PuppeteerSharp.Tests.PageTests.Events;2using System;3using System.Threading.Tasks;4{5 {6 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work")]7 public async Task ShouldWork()8 {9 var messages = new List<string>();10 Page.Console += (sender, e) => messages.Add(e.Message.Text);11 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");12 Assert.Equal(new[] {13 }, messages);14 }15 }16}17using PuppeteerSharp.Tests.PageTests.Events;18using System;19using System.Threading.Tasks;20{21 {22 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work with different console API calls")]23 public async Task ShouldWorkWithDifferentConsoleAPICalls()24 {25 var messages = new List<string>();26 Page.Console += (sender, e) => messages.Add(e.Message.Text);27 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");28 Assert.Equal(new[] {29 }, messages);30 }31 }32}33using PuppeteerSharp.Tests.PageTests.Events;34using System;35using System.Threading.Tasks;36{37 {38 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should trigger correct Log")]39 public async Task ShouldTriggerCorrectLog()40 {41 var messages = new List<string>();42 Page.Console += (sender, e) => messages.Add(e.Message.Text);43 await Page.GoToAsync(TestConstants.ServerUrl + "/​

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PageEventsConsoleTests

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1using System;2using System.Collections.Generic;3using System.Text;4using System.Threading.Tasks;5using PuppeteerSharp.Tests.PageTests.Events;6using PuppeteerSharp.Tests.Attributes;7using Xunit;8using Xunit.Abstractions;9{10 [Collection(TestConstants.TestFixtureCollectionName)]11 {12 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)13 {14 }15 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work")]16 public async Task ShouldWork()17 {18 await Page.GoToAsync(TestConstants.EmptyPage);19 Page.Console += (sender, e) => Assert.Contains(TestConstants.EmptyPage, e.Message.Text);20 await Page.EvaluateFunctionAsync("() => console.log('hello', 5, {foo: 'bar'})");21 }22 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work for different console API calls")]23 public async Task ShouldWorkForDifferentConsoleAPICalls()24 {25 await Page.GoToAsync(TestConstants.EmptyPage);26 var messages = new List<string>();27 Page.Console += (sender, e) => messages.Add(e.Message.Text);28 await Page.EvaluateFunctionAsync("() => console.error('error', new Error('oops'), 'a', 5)");29 await Page.EvaluateFunctionAsync("() => console.log(Promise.resolve('a'), 'b')");30 await Page.EvaluateFunctionAsync("() => console.dir(document.body)");31 await Page.EvaluateFunctionAsync("() => console.clear()");32 await Page.EvaluateFunctionAsync("() => console.count('test')");33 await Page.EvaluateFunctionAsync("() => console.countReset('test')");34 await Page.EvaluateFunctionAsync("() => console.assert(true, 'bad')");35 await Page.EvaluateFunctionAsync("() => console.trace('foo', {a: 1})");36 await Page.EvaluateFunctionAsync("() => console.debug('foo', {a: 1})");37 await Page.EvaluateFunctionAsync("() => console.info('foo', {a: 1})");38 await Page.EvaluateFunctionAsync("() => console.table([{a: 1, b: 'Y'}, {a: 'Z', b: 2}

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PageEventsConsoleTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.PageTests.Events;4{5 {6 [PuppeteerTest("page.spec.ts", "Page.Events.Console", "should work")]7 public async Task ShouldWork()8 {9 var messages = new List<string>();10 Page.Console += (sender, e) => messages.Add(e.Message.Text);11 await Page.GoToAsync(TestConstants.ServerUrl + "/​consolelog.html");12 Assert.Equal(new[] {

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PageEventsConsoleTests

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1using System;2using System.Collections.Generic;3using System.Text;4using System.Threading.Tasks;5using PuppeteerSharp.Tests.PageTests.Events;6using Xunit;7using Xunit.Abstractions;8{9 [Collection(TestConstants.TestFixtureCollectionName)]10 {11 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)12 {13 }14 public async Task ShouldFire()15 {16 await Page.GoToAsync(TestConstants.EmptyPage);17 Page.Console += (sender, e) => Console.WriteLine(e.Message.Text);18 await Page.EvaluateExpressionAsync("console.log('hello', 5, {foo: 'bar'})");19 }20 }21}22using System;23using System.Collections.Generic;24using System.Text;25using System.Threading.Tasks;26using PuppeteerSharp.Tests.PageTests.Events;27using Xunit;28using Xunit.Abstractions;29{30 [Collection(TestConstants.TestFixtureCollectionName)]31 {32 public PageEventsConsoleTests(ITestOutputHelper output) : base(output)33 {34 }35 public async Task ShouldFire()36 {37 await Page.GoToAsync(TestConstants.EmptyPage);38 Page.Console += (sender, e) => Console.WriteLine(e.Message.Text);39 await Page.EvaluateExpressionAsync("console.log('hello', 5, {foo: 'bar'})");40 }41 }42}43using System;44using System.Collections.Generic;45using System.Text;46using System.Threading.Tasks;47using PuppeteerSharp.Tests.PageTests.Events;48using Xunit;49using Xunit.Abstractions;50{51 [Collection(Test

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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

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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.

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You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

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