KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use QuerySelectorTests class of Microsoft.Playwright.Tests package

Best Playwright-dotnet code snippet using Microsoft.Playwright.Tests.QuerySelectorTests

QuerySelectorTests.cs

Source:QuerySelectorTests.cs

...26using Microsoft.Playwright.NUnit;27using NUnit.Framework;28namespace Microsoft.Playwright.Tests29{30    public class QuerySelectorTests : PageTestEx31    {32        [PlaywrightTest("queryselector.spec.ts", "should query existing elements")]33        public async Task ShouldQueryExistingElements()34        {35            await Page.SetContentAsync("<div>A</div><br/><div>B</div>");36            var elements = await Page.QuerySelectorAllAsync("div");37            Assert.AreEqual(2, elements.Count());38            var tasks = elements.Select(element => Page.EvaluateAsync<string>("e => e.textContent", element));39            Assert.AreEqual(new[] { "A", "B" }, await TaskUtils.WhenAll(tasks));40        }41        [PlaywrightTest("queryselector.spec.ts", "should return empty array if nothing is found")]42        public async Task ShouldReturnEmptyArrayIfNothingIsFound()43        {44            await Page.GotoAsync(Server.EmptyPage);...

QuerySelectorTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync();10            var page = await browser.NewPageAsync();11            var querySelectorTests = new QuerySelectorTests(page);12            await querySelectorTests.ShouldThrowOnNonExistingElement();13        }14    }15}16Test failed: PlaywrightSharp.PlaywrightSharpException: Protocol error (Runtime.callFunctionOn): Object reference chain is too long at Object.callFunctionOn (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crProtocolHelper.js:98:23) at ExecutionContext._evaluateInternal (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crExecutionContext.js:141:56) at ExecutionContext.evaluate (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crExecutionContext.js:70:17) at DOMWorld.evaluate (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crDOMWorld.js:113:30) at Frame.evaluate (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crFrame.js:160:31) at Frame.evaluateHandle (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib\server\chromium\crFrame.js:171:31) at Page.evaluateHandle (C:\Users\microsoft\source\repos\PlaywrightTest\PlaywrightTest\node_modules\playwright\lib

QuerySelectorTests

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4using Microsoft.Playwright.Tests;5{6    static async Task Main(string[] args)7    {8        await using var playwright = await Playwright.CreateAsync();9        await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10        {11        });12        var page = await browser.NewPageAsync();13        await page.ClickAsync("text=Images");14        await page.ClickAsync("text=News");15        await page.ClickAsync("text=Videos");16        await page.ClickAsync("text=Maps");17        await page.ClickAsync("text=Marketplace");18        await page.ClickAsync("text=More");19        await page.ClickAsync("text=Weather");20        await page.ClickAsync("text=Finance");21        await page.ClickAsync("text=Sport");22        await page.ClickAsync("text=Entertainment");23        await page.ClickAsync("text=Food & Drink");24        await page.ClickAsync("text=Lifestyle");25        await page.ClickAsync("text=Autos");26        await page.ClickAsync("text=Travel");27        await page.ClickAsync("text=Health");28        await page.ClickAsync("text=Business");29        await page.ClickAsync("text=Shopping");30        await page.ClickAsync("text=Computer");31        await page.ClickAsync("text=Education");32        await page.ClickAsync("text=Home");33        await page.ClickAsync("text=Movies & TV");34        await page.ClickAsync("text=Music");35        await page.ClickAsync("text=People & Society");36        await page.ClickAsync("text=Religion & Spirituality");37        await page.ClickAsync("text=Science");38        await page.ClickAsync("text=Sports");39        await page.ClickAsync("text=Technology & Computing");40        await page.ClickAsync("text=Transportation");41        await page.ClickAsync("text=Web Search");42        await page.ClickAsync("text=World");43        await page.ClickAsync("text=All");44        await page.ClickAsync("text=English");45        await page.ClickAsync("text=Español");46        await page.ClickAsync("text=Português");47        await page.ClickAsync("text=Deutsch");48        await page.ClickAsync("text=Français");49        await page.ClickAsync("text=Italiano");

QuerySelectorTests

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Tests;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            await Playwright.InstallAsync();9            using var playwright = await Playwright.CreateAsync();10            var browser = await playwright.Chromium.LaunchAsync();11            var page = await browser.NewPageAsync();12            await page.QuerySelectorAsync("input[name=q]");13            var querySelectorTests = new QuerySelectorTests(page);14            await querySelectorTests.QuerySelectorShouldThrowIfNodeIsRemoved();15            await browser.CloseAsync();16        }17    }18}19      System.ArgumentNullException: Value cannot be null. (Parameter 'selector')20         at Microsoft.Playwright.Core.Page.QuerySelectorAsync(String selector)21         at Microsoft.Playwright.Tests.QuerySelectorTests.QuerySelectorShouldThrowIfNodeIsRemoved() in /home/runner/work/playwright-dotnet/playwright-dotnet/src/Playwright.Tests/Page/QuerySelectorTests.cs:line 3222         at Microsoft.Playwright.Tests.PlaywrightTest.RunTestAsync(String testName) in /home/runner/work/playwright-dotnet/playwright-dotnet/src/Playwright.Tests/PlaywrightTest.cs:line 13823      System.ArgumentNullException: Value cannot be null. (Parameter 'selector')24         at Microsoft.Playwright.Core.Page.QuerySelectorAsync(String selector)25         at Microsoft.Playwright.Tests.QuerySelectorTests.QuerySelectorShouldThrowIfNodeIsRemoved() in /home/runner/work/playwright-dotnet/playwright-dotnet/src/Playwright.Tests/Page/QuerySelectorTests.cs:line 3226         at Microsoft.Playwright.Tests.PlaywrightTest.RunTestAsync(String testName) in /home/runner/work/playwright-dotnet/playwright-dotnet/src/Playwright.Tests/PlaywrightTest.cs:line 13827      System.ArgumentNullException: Value cannot be null. (Parameter 'selector')28         at Microsoft.Playwright.Core.Page.QuerySelectorAsync(String selector)

QuerySelectorTests

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using Microsoft.Playwright;3using Microsoft.Playwright.NUnit;4using NUnit.Framework;5using System;6using System.Threading.Tasks;7{8    [Parallelizable(ParallelScope.Self)]9    {10        public async Task TestMethod()11        {12            using var playwright = await Playwright.CreateAsync();13            var browserType = playwright.Chromium;14            var browser = await browserType.LaunchAsync(new BrowserTypeLaunchOptions15            {16            });17            var context = await browser.NewContextAsync();18            var page = await context.NewPageAsync();19            var test = new QuerySelectorTests(page);20            await test.ShouldThrowWhenElementIsNotVisibleAsync();21        }22    }23}24  at NUnit.Framework.Assert.That[TActual](TActual actual, IResolveConstraint expression, String message, Object[] args)25  at NUnit.Framework.Assert.That[TActual](TActual actual, IResolveConstraint expression, String message, Object[] args)26  at NUnit.Framework.Assert.ThrowsAsync[T](Func`1 code, String message, Object[] args)27  at Microsoft.Playwright.Tests.QuerySelectorTests.ShouldThrowWhenElementIsNotVisibleAsync() in C:\Users\kalyan\source\repos\PlaywrightTest\PlaywrightTest\5.cs:line 3628  at PlaywrightTest.TestClass.TestMethod() in C:\Users\kalyan\source\repos\PlaywrightTest\PlaywrightTest\5.cs:line 25

QuerySelectorTests

Using AI Code Generation

1using Microsoft.Playwright.Tests;2using NUnit.Framework;3using System;4using System.Threading.Tasks;5{6    {7        private QuerySelectorTests querySelectorTests;8        public void Setup()9        {10            querySelectorTests = new QuerySelectorTests();11        }12        public async Task Test1()13        {14            await querySelectorTests.ShouldWorkWithPage();15        }16    }17}

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.