How to use PageAssertions class of Microsoft.Playwright.Core package

Best Playwright-dotnet code snippet using Microsoft.Playwright.Core.PageAssertions

PageAssertions.cs

Source:PageAssertions.cs

...26using System.Threading.Tasks;27using Microsoft.Playwright.Transport.Protocol;28namespace Microsoft.Playwright.Core29{30    internal class PageAssertions : AssertionsBase, IPageAssertions31    {32        private readonly Page _page;33        public PageAssertions(IPage page, bool isNot) : base(PassThroughNonNull(page).Locator(":root"), isNot)34        {35            _page = (Page)page;36        }37        public IPageAssertions Not => new PageAssertions(_page, !IsNot);38        private static T PassThroughNonNull<T>(T value)39        {40            if (value == null)41            {42                throw new ArgumentNullException(nameof(value));43            }44            return value;45        }46        public Task ToHaveTitleAsync(string titleOrRegExp, PageAssertionsToHaveTitleOptions options = null) =>47            ExpectImplAsync("to.have.title", new ExpectedTextValue() { String = titleOrRegExp, NormalizeWhiteSpace = true }, titleOrRegExp, "Page title expected to be", ConvertToFrameExpectOptions(options));48        public Task ToHaveTitleAsync(Regex titleOrRegExp, PageAssertionsToHaveTitleOptions options = null) =>49            ExpectImplAsync("to.have.title", ExpectedRegex(titleOrRegExp, new() { NormalizeWhiteSpace = true }), titleOrRegExp, "Page title expected to be", ConvertToFrameExpectOptions(options));50        public Task ToHaveURLAsync(string urlOrRegExp, PageAssertionsToHaveURLOptions options = null) =>51            ExpectImplAsync("to.have.url", new ExpectedTextValue() { String = _page.Context.CombineUrlWithBase(urlOrRegExp) }, urlOrRegExp, "Page URL expected to be", ConvertToFrameExpectOptions(options));52        public Task ToHaveURLAsync(Regex urlOrRegExp, PageAssertionsToHaveURLOptions options = null) =>53            ExpectImplAsync("to.have.url", ExpectedRegex(urlOrRegExp), urlOrRegExp, "Page URL expected to match regex", ConvertToFrameExpectOptions(options));54    }55}

Assertions.cs

Source:Assertions.cs

...3{4    public static class Assertions5    {6        public static ILocatorAssertions Expect(ILocator locator) => new LocatorAssertions(locator, false);7        public static IPageAssertions Expect(IPage page) => new PageAssertions(page, false);8    }9}...

PageAssertions

Using AI Code Generation

1var playwright = await Playwright.CreateAsync();2var browser = await playwright.Chromium.LaunchAsync(headless: false);3var context = await browser.NewContextAsync();4var page = await context.NewPageAsync();5await page.FillAsync("input[title='Search']", "Hello World");6await page.ClickAsync("text=Google Search");7await page.WaitForNavigationAsync();8await page.AssertSelectorAsync("text=Hello World");9await browser.CloseAsync();10using System;11using System.Threading.Tasks;12using Microsoft.Playwright;13{14    {15        static async Task Main(string[] args)16        {17            var playwright = await Playwright.CreateAsync();18            var browser = await playwright.Chromium.LaunchAsync(headless: false);19            var context = await browser.NewContextAsync();20            var page = await context.NewPageAsync();21            await page.FillAsync("input[title='Search']", "Hello World");22            await page.ClickAsync("text=Google Search");23            await page.WaitForNavigationAsync();24            await page.AssertSelectorAsync("text=Hello World");25            await browser.CloseAsync();26        }27    }28}29using System;30using System.Threading.Tasks;31using Microsoft.Playwright;32{33    {34        static async Task Main(string[] args)35        {36            var playwright = await Playwright.CreateAsync();37            var browser = await playwright.Chromium.LaunchAsync(headless: false);

PageAssertions

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Core;3{4    static async Task Main(string[] args)5    {6        var playwright = await Playwright.CreateAsync();7        var browser = await playwright.Chromium.LaunchAsync();8        var context = await browser.NewContextAsync();9        var page = await context.NewPageAsync();10        var pageAssertions = new PageAssertions(page);11        await pageAssertions.HaveTitleAsync("Example Domain");12    }13}14using Microsoft.Playwright;15{16    static async Task Main(string[] args)17    {18        var playwright = await Playwright.CreateAsync();19        var browser = await playwright.Chromium.LaunchAsync();20        var context = await browser.NewContextAsync();21        var page = await context.NewPageAsync();22        var pageAssertions = new PageAssertions(page);23        await pageAssertions.HaveTitleAsync("Example Domain");24    }25}26using Microsoft.Playwright;27{28    static async Task Main(string[] args)29    {30        var playwright = await Playwright.CreateAsync();31        var browser = await playwright.Chromium.LaunchAsync();32        var context = await browser.NewContextAsync();33        var page = await context.NewPageAsync();34        var pageAssertions = new PageAssertions(page);35        await pageAssertions.HaveTitleAsync("Example Domain");36    }37}38using Microsoft.Playwright;39{40    static async Task Main(string[] args)41    {42        var playwright = await Playwright.CreateAsync();43        var browser = await playwright.Chromium.LaunchAsync();44        var context = await browser.NewContextAsync();45        var page = await context.NewPageAsync();46        var pageAssertions = new PageAssertions(page);47        await pageAssertions.HaveTitleAsync("Example Domain");48    }49}50using Microsoft.Playwright;51{

PageAssertions

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Core;3using Microsoft.Playwright.Helpers;4using NUnit.Framework;5using System;6using System.Collections.Generic;7using System.Linq;8using System.Text;9using System.Threading.Tasks;10{11    {12        private IPlaywright _playwright;13        private IBrowser _browser;14        private IBrowserContext _context;15        private IPage _page;16        private PageAssertions _assert;17        public async Task Setup()18        {19            _playwright = await Playwright.CreateAsync();20            _browser = await _playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions21            {22            });23            _context = await _browser.NewContextAsync(new BrowserNewContextOptions24            {25                Viewport = new ViewportSize { Width = 1920, Height = 1080 },26                Geolocation = new Geolocation { Longitude = 12.492507, Latitude = 41.889938 },27                Permissions = new[] { "geolocation" }28            });29            _page = await _context.NewPageAsync();30            _assert = new PageAssertions(_page);31        }32        public async Task Test1()33        {34            await _page.FillAsync("input[name='q']", "playwright");35            await _page.PressAsync("input[name='q']", "Enter");36            await _page.WaitForLoadStateAsync(LoadState.Load);37            await _page.WaitForSelectorAsync("text=Playwright");38            await _page.ClickAsync("text=Playwright");39            await _page.WaitForLoadStateAsync(LoadState.Load);40            await _page.WaitForSelectorAsync("text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.");41            await _assert.HasTextAsync("text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.");42        }43        public async Task TearDown()44        {45            await _browser.CloseAsync();46            await _playwright.StopAsync();47        }48    }49}

PageAssertions

Using AI Code Generation

1using Microsoft.Playwright;2using System.Threading.Tasks;3{4    {5        private readonly IPage _page;6        public PageAssertions(IPage page)7        {8            _page = page;9        }10        public async Task HasTextContentAsync(string text, string selector, string? message = null)11        {12            var element = await _page.QuerySelectorAsync(selector);13            var content = await element.GetTextContentAsync();14            if (content != text)15            {16                throw new PlaywrightAssertionException(message ?? $"Expected the element \"{selector}\" to contain the text \"{text}\", but found \"{content}\" instead.");17            }18        }19    }20}21using Microsoft.Playwright;22using System.Threading.Tasks;23{24    {25        private readonly IPage _page;26        public PageAssertions(IPage page)27        {28            _page = page;29        }30        public async Task HasTextContentAsync(string text, string selector, string? message = null)31        {32            var element = await _page.QuerySelectorAsync(selector);33            var content = await element.GetTextContentAsync();34            if (content != text)35            {36                throw new PlaywrightAssertionException(message ?? $"Expected the element \"{selector}\" to contain the text \"{text}\", but found \"{content}\" instead.");37            }38        }39    }40}41I have a problem with the following code: The error message is as follows: 'IPage' does not contain a definition for 'HasTextContent' and no accessible extension method 'HasTextContent' accepting a first argument of type 'IPage' could be found (are you missing a using directive or an assembly reference?)'. I have tried to add the following code to the top of the class, but it doesn't work: using Microsoft.Playwright; using Microsoft.Playwright.Core; using Microsoft.Playwright.NUnit; using Microsoft.Playwright.Testing; using Microsoft.Playwright.Testing.Xunit; using Microsoft.Playwright.Testing.Xunit.Attributes; using Microsoft.Playwright.Testing.Xunit.Extensions; using Microsoft.Playwright.Testing.Xunit.Internal.Attributes; using Microsoft.Playwright.Testing.Xunit.Internal.Extensions; using Microsoft.Playwright.Xunit; using Microsoft.Playwright.Xunit.Attributes; using Microsoft.Playwright.Xunit.Extensions; using Microsoft.Playwright.Xunit.Internal.Attributes

PageAssertions

Using AI Code Generation

1using Microsoft.Playwright.Core;2using Microsoft.Playwright.Core.Tests;3using Microsoft.Playwright;4using Microsoft.Playwright.Helpers;5using Microsoft.Playwright.Tests;6using NUnit.Framework;7using System;8using System.Collections.Generic;9using System.Diagnostics;10using System.Linq;11using System.Text;12using System.Threading.Tasks;13{14    {15        [PlaywrightTest("page-assertions.spec.ts", "should throw if selector does not exist")]16        [Test, Timeout(TestConstants.DefaultTestTimeout)]17        public async Task ShouldThrowIfSelectorDoesNotExist()18        {19            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(async () => await Page.AssertSelectorAsync(".zombo"));20            StringAssert.Contains("expected selector .zombo to exist", exception.Message);21        }22        [PlaywrightTest("page-assertions.spec.ts", "should throw if selector exists")]23        [Test, Timeout(TestConstants.DefaultTestTimeout)]24        public async Task ShouldThrowIfSelectorExists()25        {26            await Page.SetContentAsync("<html><body><div class=\"zombo\"></div></body></html>");27            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(async () => await Page.AssertNoSelectorAsync(".zombo"));28            StringAssert.Contains("expected selector .zombo not to exist", exception.Message);29        }30        [PlaywrightTest("page-assertions.spec.ts", "should throw if text does not exist")]31        [Test, Timeout(TestConstants.DefaultTestTimeout)]32        public async Task ShouldThrowIfTextDoesNotExist()33        {34            await Page.SetContentAsync("<html><body><div class=\"zombo\">anything</div></body></html>");35            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(async () => await Page.AssertSelectorAsync(":text(\"nothing\")"));36            StringAssert.Contains("expected selector :text(\"nothing\") to exist", exception.Message);37        }38        [PlaywrightTest("page-assertions.spec.ts", "should throw if text exists")]39        [Test, Timeout(TestConstants.DefaultTestTimeout)]40        public async Task ShouldThrowIfTextExists()41        {42            await Page.SetContentAsync("<html><body><div class=\"zombo\">anything</div></body></html>");43            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(async () => await Page.AssertNoSelectorAsync(":text(\"

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.

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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.
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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.
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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.
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