How to use FrameEvaluateTests class of PuppeteerSharp.Tests.EvaluationTests package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests

FrameEvaluateTests.cs

Source: FrameEvaluateTests.cs Github

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...6using Xunit.Abstractions;7namespace PuppeteerSharp.Tests.EvaluationTests8{9 [Collection(TestConstants.TestFixtureCollectionName)]10 public class FrameEvaluateTests : PuppeteerPageBaseTest11 {12 public FrameEvaluateTests(ITestOutputHelper output) : base(output)13 {14 }15 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should have different execution contexts")]16 [PuppeteerFact]17 public async Task ShouldHaveDifferentExecutionContexts()18 {19 await Page.GoToAsync(TestConstants.EmptyPage);20 await FrameUtils.AttachFrameAsync(Page, "frame1", TestConstants.EmptyPage);21 Assert.Equal(2, Page.Frames.Count());22 var frame1 = Page.MainFrame;23 var frame2 = Page.FirstChildFrame();24 await frame1.EvaluateExpressionAsync("window.FOO = 'foo'");25 await frame2.EvaluateExpressionAsync("window.FOO = 'bar'");26 Assert.Equal("foo", await frame1.EvaluateExpressionAsync<string>("window.FOO"));...

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FrameEvaluateTests

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1using PuppeteerSharp.Tests.EvaluationTests;2using System.Threading.Tasks;3{4 {5 static async Task Main(string[] args)6 {7 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions8 {9 }))10 using (var page = await browser.NewPageAsync())11 {12 await FrameEvaluateTests.ShouldAwaitPromise();13 await page.ScreenshotAsync("google.png");14 }15 }16 }17}

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FrameEvaluateTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.EvaluationTests;4{5 {6 static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });9 var page = await browser.NewPageAsync();10 await FrameEvaluateTests.ShouldThrowErrorWhenEvaluationTriggersReload();11 }12 }13}

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FrameEvaluateTests

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1using PuppeteerSharp.Tests.EvaluationTests;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 await FrameEvaluateTests.TestEvaluateHandle();9 }10 }11}12using PuppeteerSharp.Tests.EvaluationTests;13using System;14using System.Threading.Tasks;15{16 {17 static async Task Main(string[] args)18 {19 await FrameEvaluateTests.TestEvaluateHandle();20 }21 }22}23using PuppeteerSharp.Tests.EvaluationTests;24using System;25using System.Threading.Tasks;26{27 {28 static async Task Main(string[] args)29 {30 await FrameEvaluateTests.TestEvaluateHandle();31 }32 }33}34using PuppeteerSharp.Tests.EvaluationTests;35using System;36using System.Threading.Tasks;37{38 {39 static async Task Main(string[] args)40 {41 await FrameEvaluateTests.TestEvaluateHandle();42 }43 }44}45using PuppeteerSharp.Tests.EvaluationTests;46using System;47using System.Threading.Tasks;48{49 {50 static async Task Main(string[] args)51 {52 await FrameEvaluateTests.TestEvaluateHandle();53 }54 }55}56using PuppeteerSharp.Tests.EvaluationTests;57using System;58using System.Threading.Tasks;59{60 {61 static async Task Main(string[] args)62 {63 await FrameEvaluateTests.TestEvaluateHandle();64 }65 }66}67using PuppeteerSharp.Tests.EvaluationTests;68using System;69using System.Threading.Tasks;

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FrameEvaluateTests

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1using PuppeteerSharp.Tests.EvaluationTests;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions9 {10 Args = new string[] { "--no-sandbox" }11 });12 var page = await browser.NewPageAsync();13 var frame = page.MainFrame;14 var element = await frame.QuerySelectorAsync("input[name='q']");15 var result = await frame.EvaluateFunctionAsync<string>("element => element.value", element);16 Console.WriteLine(result);17 await browser.CloseAsync();18 }19 }20}21using PuppeteerSharp.Tests.EvaluationTests;22using System;23using System.Threading.Tasks;24{25 {26 static async Task Main(string[] args)27 {28 var browser = await Puppeteer.LaunchAsync(new LaunchOptions29 {30 Args = new string[] { "--no-sandbox" }31 });32 var page = await browser.NewPageAsync();33 var frame = page.MainFrame;34 var element = await frame.QuerySelectorAsync("input[name='q']");35 var result = await frame.EvaluateExpressionAsync<string>("element => element.value", element);36 Console.WriteLine(result);37 await browser.CloseAsync();38 }39 }40}41using PuppeteerSharp.Tests.EvaluationTests;42using System;43using System.Threading.Tasks;44{45 {46 static async Task Main(string[] args)47 {48 var browser = await Puppeteer.LaunchAsync(new LaunchOptions49 {50 Args = new string[] { "--no-sandbox" }51 });

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FrameEvaluateTests

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1var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");2FrameEvaluateTests();3var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");4FrameEvaluateTests();5var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");6FrameEvaluateTests();7var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");8FrameEvaluateTests();9var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");10FrameEvaluateTests();11var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");12FrameEvaluateTests();13var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");14FrameEvaluateTests();15var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");16FrameEvaluateTests();17var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");18FrameEvaluateTests();19var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");20FrameEvaluateTests();21var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");22FrameEvaluateTests();23var FrameEvaluateTests = require("PuppeteerSharp.Tests.EvaluationTests.FrameEvaluateTests");24FrameEvaluateTests();

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FrameEvaluateTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.EvaluationTests;4using PuppeteerSharp.Tests.Attributes;5using Xunit;6using Xunit.Abstractions;7using PuppeteerSharp.Tests;8using System.Collections.Generic;9using System.Linq;10{11 [Collection("PuppeteerLoaderFixture collection")]12 {13 const string AddScriptUrl = "./​assets/​addScript.js";14 private readonly ITestOutputHelper output;15 public FrameEvaluateTests(ITestOutputHelper output)16 {17 this.output = output;18 }19 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should work with primitives")]20 public async Task ShouldWorkWithPrimitives()21 {22 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);23 var frame = Page.Frames[1];24 var result = await frame.EvaluateAsync("() => 7 * 3");25 Assert.Equal(21, result);26 }27 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer NaN")]28 public async Task ShouldTransferNaN()29 {30 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);31 var frame = Page.Frames[1];32 var result = await frame.EvaluateAsync<double>("a => a", double.NaN);33 Assert.Equal(double.NaN, result);34 }35 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer -0")]36 public async Task ShouldTransferNegative0()37 {38 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);39 var frame = Page.Frames[1];40 var result = await frame.EvaluateAsync<double>("a => a", -0);41 Assert.Equal(-0, result);42 }43 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer Infinity")]44 public async Task ShouldTransferInfinity()45 {46 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);47 var frame = Page.Frames[1];48 var result = await frame.EvaluateAsync<double>("a => a", double.PositiveInfinity);49 Assert.Equal(double.PositiveInfinity, result);50 }

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FrameEvaluateTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Tests;5using Xunit;6using System.Linq;7{8 {9 public async Task ShouldWork()10 {11 await Page.GoToAsync(TestConstants.ServerUrl + "/​tamperable.html");12 var (result, exception) = await Page.EvaluateExpressionHandleAsync("() => 7 * 3");13 Assert.Null(exception);14 Assert.Equal(21, await result.JsonValueAsync());15 }16 public async Task ShouldAwaitPromise()17 {18 await Page.GoToAsync(TestConstants.ServerUrl + "/​tamperable.html");19 var (result, exception) = await Page.EvaluateExpressionHandleAsync("() => Promise.resolve(8 * 7)");20 Assert.Null(exception);21 Assert.Equal(56, await result.JsonValueAsync());22 }23 public async Task ShouldWorkRightAfterFrameDetached()24 {25 await Page.GoToAsync(TestConstants.EmptyPage);26 var frame = await FrameUtils.AttachFrameAsync(Page, "frame1", TestConstants.EmptyPage);27 await Page.EvaluateExpressionAsync("window.frame = frame");28 await Page.EvaluateExpressionAsync("frame.remove()");29 var (result, exception) = await Page.EvaluateExpressionHandleAsync("() => 7 * 3");30 Assert.Null(exception);31 Assert.Equal(21, await result.JsonValueAsync());32 }33 public async Task ShouldThrowAnErrorIfEvaluationTriggersReload()34 {35 await Page.GoToAsync(TestConstants.ServerUrl + "/​tamperable.html");36 var watchdog = Page.WaitForNavigationAsync();37 var (result, exception) = await Page.EvaluateExpressionHandleAsync("() => location.reload()");38 Assert.Null(result);39 Assert.NotNull(exception);40 Assert.Equal("Protocol error (Runtime.callFunctionOn): Session closed. Most likely the page has been closed.", exception.Message);41 await watchdog;42 }43 public async Task ShouldReturnTheThrownValueAsAError()44 {45 await Page.GoToAsync(TestConstants.ServerUrl + "/​tamperable.html");46 var (result, exception) = await Page.EvaluateExpressionHandleAsync("() =>

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FrameEvaluateTests

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1using PuppeteerSharp.Tests.EvaluationTests;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions9 {10 Args = new string[] { "--no-sandbox" }11 });12 var page = await browser.NewPageAsync();13 var frame = page.MainFrame;14 var element = await frame.QuerySelectorAsync("input[name='q']");15 var result = await frame.EvaluateFunctionAsync<string>("element => element.value", element);16 Console.WriteLine(result);17 await browser.CloseAsync();18 }19 }20}21using PuppeteerSharp.Tests.EvaluationTests;22using System;23using System.Threading.Tasks;24{25 {26 static async Task Main(string[] args)27 {28 var browser = await Puppeteer.LaunchAsync(new LaunchOptions29 {30 Args = new string[] { "--no-sandbox" }31 });32 var page = await browser.NewPageAsync();33 var frame = page.MainFrame;34 var element = await frame.QuerySelectorAsync("input[name='q']");35 var result = await frame.EvaluateExpressionAsync<string>("element => element.value", element);36 Console.WriteLine(result);37 await browser.CloseAsync();38 }39 }40}41using PuppeteerSharp.Tests.EvaluationTests;42using System;43using System.Threading.Tasks;44{45 {46 static async Task Main(string[] args)47 {48 var browser = await Puppeteer.LaunchAsync(new LaunchOptions49 {50 Args = new string[] { "--no-sandbox" }51 });

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FrameEvaluateTests

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.EvaluationTests;4using PuppeteerSharp.Tests.Attributes;5using Xunit;6using Xunit.Abstractions;7using PuppeteerSharp.Tests;8using System.Collections.Generic;9using System.Linq;10{11 [Collection("PuppeteerLoaderFixture collection")]12 {13 const string AddScriptUrl = "./​assets/​addScript.js";14 private readonly ITestOutputHelper output;15 public FrameEvaluateTests(ITestOutputHelper output)16 {17 this.output = output;18 }19 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should work with primitives")]20 public async Task ShouldWorkWithPrimitives()21 {22 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);23 var frame = Page.Frames[1];24 var result = await frame.EvaluateAsync("() => 7 * 3");25 Assert.Equal(21, result);26 }27 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer NaN")]28 public async Task ShouldTransferNaN()29 {30 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);31 var frame = Page.Frames[1];32 var result = await frame.EvaluateAsync<double>("a => a", double.NaN);33 Assert.Equal(double.NaN, result);34 }35 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer -0")]36 public async Task ShouldTransferNegative0()37 {38 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);39 var frame = Page.Frames[1];40 var result = await frame.EvaluateAsync<double>("a => a", -0);41 Assert.Equal(-0, result);42 }43 [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should transfer Infinity")]44 public async Task ShouldTransferInfinity()45 {46 await FrameUtils.AttachFrame(Page, "frame1", TestConstants.EmptyPage);47 var frame = Page.Frames[1];48 var result = await frame.EvaluateAsync<double>("a => a", double.PositiveInfinity);49 Assert.Equal(double.PositiveInfinity, result);50 }

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StackOverFlow community discussions

Questions
Discussion

Is there a remove page method corresponding to NewPageAsync() in PuppeteerSharp?

how to use puppeteer-sharp touchStart and touchEnd and touch move

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PuppeteerSharp throws ChromiumProcessException &quot;Failed to create connection&quot; when launching a browser

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PuppeteerSharp - querySelectorAll + click

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PuppeteerSharp best practices

PuppeteerSharp evaluate expression to complex type?

Puppeteer Sharp strange behaviour

You can close the page using CloseAsync:

var page = browser.NewPageAsync();
////
await page.CloseAsync();

An using block will also close the page:

using (var page = await new browser.PageAsync())
{
///
}

Puppeteer-Sharp v2.0.3+ also supports await using blocks

await using (var page = await new browser.PageAsync())
{
 ///
}
https://stackoverflow.com/questions/61517099/is-there-a-remove-page-method-corresponding-to-newpageasync-in-puppeteersharp

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