How to use ShouldReturnNullForNonExistingElement method of PuppeteerSharp.Tests.QuerySelectorTests.PageQuerySelectorTests class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.QuerySelectorTests.PageQuerySelectorTests.ShouldReturnNullForNonExistingElement

PageQuerySelectorTests.cs

Source:PageQuerySelectorTests.cs

...20            Assert.NotNull(element);21        }22        [PuppeteerTest("queryselector.spec.ts", "Page.$", "should query existing element")]23        [PuppeteerFact]24        public async Task ShouldReturnNullForNonExistingElement()25        {26            var element = await Page.QuerySelectorAsync("non-existing-element");27            Assert.Null(element);28        }29    }30}...

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1{2    [Collection("PuppeteerLoaderFixture collection")]3    {4        public async Task ShouldReturnNullForNonExistingElement()5        {6            await Page.GoToAsync(TestConstants.EmptyPage);7            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));8        }9    }10}11{12    [Collection("PuppeteerLoaderFixture collection")]13    {14        public async Task ShouldReturnNullForNonExistingElement()15        {16            await Page.GoToAsync(TestConstants.EmptyPage);17            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));18        }19    }20}21{22    [Collection("PuppeteerLoaderFixture collection")]23    {24        public async Task ShouldReturnNullForNonExistingElement()25        {26            await Page.GoToAsync(TestConstants.EmptyPage);27            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));28        }29    }30}31{32    [Collection("PuppeteerLoaderFixture collection")]33    {34        public async Task ShouldReturnNullForNonExistingElement()35        {36            await Page.GoToAsync(TestConstants.EmptyPage);37            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));38        }39    }40}41{

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using NUnit.Framework;7using PuppeteerSharp.Tests.Attributes;8{9    {10        public async Task ShouldQueryExistingElement()11        {12            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");13            Assert.AreEqual("PLAYGROUND", await Page.QuerySelectorEvalAsync("h1", "x => x.id"));14        }15        public async Task ShouldReturnNullForNonExistingElement()16        {17            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");18            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));19        }20        public async Task ShouldWorkWithRemovedMutation()21        {22            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");23            await Page.EvaluateFunctionAsync("() => delete window['Node']");24            Assert.Null(await Page.QuerySelectorAsync("div"));25        }26        public async Task ShouldWorkWithShadowDom()27        {28            await Page.GoToAsync(TestConstants.ServerUrl + "/shadow.html");29            Assert.AreEqual("H1 in root", await Page.QuerySelectorEvalAsync("span >> css=div >> css=h1", "x => x.textContent"));30        }31        public async Task ShouldWorkWithShadowDomAndText()32        {33            await Page.GoToAsync(TestConstants.ServerUrl + "/shadow.html");34            Assert.AreEqual("H1 in root", await Page.QuerySelectorEvalAsync("css=div >> text=\"H1 in root\"", "x => x.textContent"));35        }36        public async Task ShouldWorkWithContentSlotted()37        {38            await Page.GoToAsync(TestConstants.ServerUrl + "/shadow.html");39            Assert.AreEqual("H1 in root", await Page.QuerySelectorEvalAsync("css=div >> css=section >> css=slot >> css=h1", "x => x.textContent"));40        }

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Xunit;4using PuppeteerSharp.Tests.Attributes;5using PuppeteerSharp.Xunit;6{7    [Collection(TestConstants.TestFixtureCollectionName)]8    {9        [PuppeteerTest("queryselector.spec.ts", "Page.$", "should return null for non-existing element")]10        public async Task ShouldReturnNullForNonExistingElement()11        {12            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));13        }14    }15}16using System;17using System.Threading.Tasks;18using Xunit;19using PuppeteerSharp.Tests.Attributes;20using PuppeteerSharp.Xunit;21{22    [Collection(TestConstants.TestFixtureCollectionName)]23    {24        [PuppeteerTest("queryselector.spec.ts", "Page.$", "should return the only element with matching selector")]25        public async Task ShouldReturnTheOnlyElementWithMatchingSelector()26        {27            await Page.SetContentAsync("<div>A</div><br/><div>B</div>");28            var element = await Page.QuerySelectorAsync("div");29            Assert.Equal("A", await Page.EvaluateFunctionAsync<string>("e => e.textContent", element));30        }31    }32}33using System;34using System.Threading.Tasks;35using Xunit;36using PuppeteerSharp.Tests.Attributes;37using PuppeteerSharp.Xunit;38{39    [Collection(TestConstants.TestFixtureCollectionName)]40    {41        [PuppeteerTest("queryselector.spec.ts", "Page.$", "should return the only element with matching xpath")]42        public async Task ShouldReturnTheOnlyElementWithMatchingXpath()43        {44            await Page.SetContentAsync("<div>A</div><br/><div>B</div>");45            var element = await Page.QuerySelectorAsync("./

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Tests.QuerySelectorTests;7{8    {9        static void Main(string[] args)10        {11            var test = new PageQuerySelectorTests();12            test.ShouldReturnNullForNonExistingElement();13        }14    }15}16using System;17using System.Collections.Generic;18using System.Linq;19using System.Text;20using System.Threading.Tasks;21using PuppeteerSharp.Tests.QuerySelectorTests;22{23    {24        static void Main(string[] args)25        {26            var test = new PageQuerySelectorTests();27            test.ShouldReturnNullForNonExistingElement();28        }29    }30}31using System;32using System.Collections.Generic;33using System.Linq;34using System.Text;35using System.Threading.Tasks;36using PuppeteerSharp.Tests.QuerySelectorTests;37{38    {39        static void Main(string[] args)40        {41            var test = new PageQuerySelectorTests();42            test.ShouldReturnNullForNonExistingElement();43        }44    }45}46using System;47using System.Collections.Generic;48using System.Linq;49using System.Text;50using System.Threading.Tasks;51using PuppeteerSharp.Tests.QuerySelectorTests;52{53    {54        static void Main(string[] args)55        {56            var test = new PageQuerySelectorTests();57            test.ShouldReturnNullForNonExistingElement();58        }59    }60}61using System;62using System.Collections.Generic;63using System.Linq;

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Xunit;4{5    [Collection("PuppeteerLoaderFixture collection")]6    {7        public async Task ShouldReturnNullForNonExistingElement()8        {9            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");10            Assert.Null(await Page.QuerySelectorAsync("non-existing-element"));11        }12    }13}14using System;15using System.Threading.Tasks;16using Xunit;17{18    [Collection("PuppeteerLoaderFixture collection")]19    {20        public async Task ShouldReturnTheOnlyElement()21        {22            await Page.GoToAsync(TestConstants.ServerUrl + "/playground.html");23            Assert.Equal("BUTTON", (await Page.QuerySelectorAsync("button")).TagName);24        }25    }26}27using System;28using System.Threading.Tasks;29using Xunit;30{31    [Collection("PuppeteerLoaderFixture collection")]32    {33        public async Task ShouldReturnTheOnlyElementInShadowDom()34        {35            await Page.GoToAsync(TestConstants.ServerUrl + "/shadow.html");36            Assert.Equal("PUPPETEER-SHADOW", (await Page.QuerySelectorAsync("section#inner")).TagName);37        }38    }39}40using System;41using System.Threading.Tasks;42using Xunit;43{44    [Collection("PuppeteerLoaderFixture collection")]

ShouldReturnNullForNonExistingElement

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    public static async Task Main(string[] args)6    {7        await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);8        using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))9        using (var page = await browser.NewPageAsync())10        {11            await page.QuerySelectorAsync("non-existing-element");12        }13    }14}15   at PuppeteerSharp.Page.QuerySelectorAsync(St

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