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

Use Code: LCMYEARENDEXCL30

Copied to Clipboard!

How to use ElementHandleQuerySelectorEvalTests class of PuppeteerSharp.Tests.QuerySelectorTests package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.QuerySelectorTests.ElementHandleQuerySelectorEvalTests

ElementHandleQuerySelectorEvalTests.cs

Source:ElementHandleQuerySelectorEvalTests.cs

...6using Xunit.Abstractions;7namespace PuppeteerSharp.Tests.QuerySelectorTests8{9    [Collection(TestConstants.TestFixtureCollectionName)]10    public class ElementHandleQuerySelectorEvalTests : PuppeteerPageBaseTest11    {12        public ElementHandleQuerySelectorEvalTests(ITestOutputHelper output) : base(output)13        {14        }15        async Task Usage(Browser browser)16        {17            #region Evaluate18            await using var page = await browser.NewPageAsync();19            var seven = await page.EvaluateExpressionAsync<int>("4 + 3");20            var someObject = await page.EvaluateFunctionAsync<dynamic>("(value) => ({a: value})", 5);21            Console.WriteLine(someObject.a);22            #endregion23        }24        [PuppeteerTest("queryselector.spec.ts", "ElementHandle.$eval", "should work")]25        [PuppeteerFact]26        public async Task QuerySelectorShouldWork()...

ElementHandleQuerySelectorEvalTests

Using AI Code Generation

1using PuppeteerSharp.Tests.QuerySelectorTests;2{3    {4        public async Task ShouldWork()5        {6            await Page.SetContentAsync("<section id=\"testAttribute\">43543</section>");7            var element = await Page.QuerySelectorAsync("section");8            var text = await element.QuerySelectorEvalAsync<string>("id", "e => e.textContent");9            Assert.Equal("testAttribute", text);10        }11        public async Task ShouldThrowIfNoElementIsFound()12        {13            await Page.SetContentAsync("<section>43543</section>");14            var element = await Page.QuerySelectorAsync("section");15            var exception = await Assert.ThrowsAsync<PuppeteerException>(() => element.QuerySelectorEvalAsync<string>("id", "e => e.textContent"));16            Assert.Contains("Unable to find element", exception.Message);17        }18    }19}20using PuppeteerSharp.Tests.QuerySelectorTests;21{22    {23        public async Task ShouldWork()24        {25            await Page.SetContentAsync("<div>hello</div><div>beautiful</div><div>world!</div>");26            var html = await Page.QuerySelectorAsync("div");27            var elements = await html.QuerySelectorAllAsync("*");28            Assert.Equal(3, elements.Length);29        }30        public async Task ShouldReturnEmptyArrayIfNothingIsFound()31        {32            await Page.SetContentAsync("<div>hello</div><div>beautiful</div><div>world!</div>");33            var html = await Page.QuerySelectorAsync("span");34            var elements = await html.QuerySelectorAllAsync("*");35            Assert.Empty(elements);36        }37    }38}39using PuppeteerSharp.Tests.QuerySelectorTests;40{41    {42        public async Task ShouldWork()43        {44            await Page.SetContentAsync("<section>test

ElementHandleQuerySelectorEvalTests

Using AI Code Generation

1using PuppeteerSharp.Tests.QuerySelectorTests;2using PuppeteerSharp.Tests.QuerySelectorTests;3using PuppeteerSharp.Tests.QuerySelectorTests;4using PuppeteerSharp.Tests.QuerySelectorTests;5using PuppeteerSharp.Tests.QuerySelectorTests;6using PuppeteerSharp.Tests.QuerySelectorTests;7using PuppeteerSharp.Tests.QuerySelectorTests;8using PuppeteerSharp.Tests.QuerySelectorTests;9using PuppeteerSharp.Tests.QuerySelectorTests;10using PuppeteerSharp.Tests.QuerySelectorTests;11using PuppeteerSharp.Tests.QuerySelectorTests;12using PuppeteerSharp.Tests.QuerySelectorTests;13using PuppeteerSharp.Tests.QuerySelectorTests;14using PuppeteerSharp.Tests.QuerySelectorTests;15using PuppeteerSharp.Tests.QuerySelectorTests;

ElementHandleQuerySelectorEvalTests

Using AI Code Generation

1using PuppeteerSharp.Tests.QuerySelectorTests;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            await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value = 'PuppeteerSharp'");14            await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value");15            await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value = 'PuppeteerSharp'");16            await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value");17            await browser.CloseAsync();18        }19    }20}21var page = await browser.NewPageAsync();22await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value = 'PuppeteerSharp'");23var value = await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value");24Console.WriteLine(value);25var page = await browser.NewPageAsync();26await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value = 'PuppeteerSharp'");27var value = await page.QuerySelectorEvalAsync("input[name=q]", "element => element.value");28Console.WriteLine(value);

ElementHandleQuerySelectorEvalTests

Using AI Code Generation

1using PuppeteerSharp.Tests.QuerySelectorTests;2using System;3using System.Threading.Tasks;4{5    {6        public async Task ShouldWork()7        {8            await Page.SetContentAsync("<section id='testAttribute'>43543</section>");9            var html = await Page.QuerySelectorAsync("section").QuerySelectorEvalAsync<string>("id", "e => e.textContent");10            Assert.Equal("43543", html);11        }12    }13}14using PuppeteerSharp.Tests.QuerySelectorTests;15using System;16using System.Threading.Tasks;17{18    {19        public async Task ShouldThrowAnErrorIfNoElementIsFound()20        {21            await Page.SetContentAsync("<section>test</section>");22            var exception = await Assert.ThrowsAsync<PuppeteerException>(async () => await Page.QuerySelectorAsync("section").QuerySelectorEvalAsync<string>("no-existo", "e => e.textContent"));23            Assert.Equal("Error: failed to find element matching selector \"no-existo\"", exception.Message);24        }25    }26}27using PuppeteerSharp.Tests.QuerySelectorTests;28using System;29using System.Threading.Tasks;30{31    {32        public async Task ShouldRetainElementHandles()33        {34            await Page.SetContentAsync("<section>test</section>");35            var element = await Page.QuerySelectorAsync("section");36            await element.QuerySelectorEvalAsync<string>("section", "e => e.textContent");37            Assert.NotNull(element);38        }39    }40}41using PuppeteerSharp.Tests.QuerySelectorTests;42using System;43using System.Threading.Tasks;44{

ElementHandleQuerySelectorEvalTests

Using AI Code Generation

1using PuppeteerSharp.Tests.QuerySelectorTests;2{3    [Collection("PuppeteerLoaderFixture collection")]4    {5        public async Task ShouldWork()6        {7            await Page.SetContentAsync("<section id='testAttribute'>43543</section>");8            var element = await Page.QuerySelectorAsync("section");9            var text = await element.QuerySelectorEvalAsync<string>("id", "e => e.textContent");10            Assert.Equal("testAttribute", text);11        }12    }13}14{15    [Collection("PuppeteerLoaderFixture collection")]16    {17        public async Task ShouldWork()18        {19            await Page.SetContentAsync("<section id='testAttribute'>43543</section>");20            var element = await Page.QuerySelectorAsync("section");21            var text = await element.QuerySelectorEvalAsync<string>("id", "e => e.textContent");22            Assert.Equal("testAttribute", text);23        }24    }25}

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.

LambdaTest Learning Hubs:

YouTube

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

Run Puppeteer-sharp automation tests on LambdaTest cloud grid

Perform automation testing on 3000+ real desktop and mobile devices online.

View sample repo

View Documentation Sign up Free

Most used methods in ElementHandleQuerySelectorEvalTests

Try LambdaTest Now !!

Get 100 minutes of automation test minutes FREE!!

Sign up with Google Sign up with Email

Next-Gen App & Browser Testing Cloud

Was this article helpful?