How to use PageExposeFunctionAsync method of PuppeteerSharp.Tests.PageTests.ExposeFunctionTests class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.PageTests.ExposeFunctionTests.PageExposeFunctionAsync

PageExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.Attributes;4using Xunit;5using Xunit.Abstractions;6{7    [Collection(TestConstants.TestFixtureCollectionName)]8    {9        public ExposeFunctionTests(ITestOutputHelper output) : base(output)10        {11        }12        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work")]13        public async Task ShouldWork()14        {15            await Page.ExposeFunctionAsync("woof", (string s) => s + "woof");16            var result = await Page.EvaluateExpressionAsync<string>("woof('dog')");17            Assert.Equal("dogwoof", result);18        }19        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work with complex objects")]20        public async Task ShouldWorkWithComplexObjects()21        {22            await Page.ExposeFunctionAsync("complexObject", (ComplexObject obj) => obj.Foo + " " + obj.Bar);23            var result = await Page.EvaluateExpressionAsync<string>("complexObject({foo: 'foo', bar: 'bar'})");24            Assert.Equal("foo bar", result);25        }26        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should throw for non-functions")]27        public async Task ShouldThrowForNonFunctions()28        {29            var exception = await Assert.ThrowsAsync<ArgumentException>(()30                => Page.ExposeFunctionAsync("object", new object()));31            Assert.Equal("Expected to get |function| object, but got |object|", exception.Message);32        }33        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should survive navigation")]34        public async Task ShouldSurviveNavigation()35        {36            await Page.ExposeFunctionAsync("woof", (string s) => s + "woof");37            await Page.GoToAsync(TestConstants.EmptyPage);38            var result = await Page.EvaluateExpressionAsync<string>("woof('dog')");39            Assert.Equal("dogwoof", result);40        }41        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should await returned promise")]

PageExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Tests.Attributes;4using Xunit;5using Xunit.Abstractions;6{7    [Collection(TestConstants.TestFixtureCollectionName)]8    {9        public ExposeFunctionTests(ITestOutputHelper output) : base(output)10        {11        }12        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work")]13        public async Task ShouldWork()14        {15            await Page.ExposeFunctionAsync("woof", () => "WOOF WOOF");16            var result = await Page.EvaluateExpressionAsync<string>("woof()");17            Assert.Equal("WOOF WOOF", result);18        }19        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should throw if the page is closed")]20        public async Task ShouldThrowIfThePageIsClosed()21        {22            await Page.ExposeFunctionAsync("woof", () => "WOOF WOOF");23            await Page.CloseAsync();24            var exception = await Assert.ThrowsAsync<TargetClosedException>(() => Page.EvaluateExpressionAsync<string>("woof()"));25            Assert.Contains("Protocol error", exception.Message);26        }27        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should survive cross-process navigation")]28        public async Task ShouldSurviveCrossProcessNavigation()29        {30            await Page.ExposeFunctionAsync("woof", () => "WOOF WOOF");31            var response = await Page.GoToAsync(TestConstants.EmptyPage);32            Assert.Equal(200, response.Status);33            var result = await Page.EvaluateExpressionAsync<string>("woof()");34            Assert.Equal("WOOF WOOF", result);35        }36        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should await returned promise")]37        public async Task ShouldAwaitReturnedPromise()38        {39            await Page.ExposeFunctionAsync("asyncWoof", () => Task.FromResult("WOOF WOOF"));40            var result = await Page.EvaluateExpressionAsync<string>("asyncWoof()");41            Assert.Equal("WOOF WOOF", result);42        }43        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should

PageExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Tests.Attributes;5using Xunit;6using Xunit.Abstractions;7{8    [Collection(TestConstants.TestFixtureCollectionName)]9    {10        public ExposeFunctionTests(ITestOutputHelper output) : base(output)11        {12        }13        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work")]14        public async Task ShouldWork()15        {16            await Page.ExposeFunctionAsync("woof", (string a) => $"{a} woof");17            var result = await Page.EvaluateExpressionAsync<string>("woof('dog')");18            Assert.Equal("dog woof", result);19        }20        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work with complex objects")]21        public async Task ShouldWorkWithComplexObjects()22        {23            await Page.ExposeFunctionAsync("complexObject", (object a) => new { foo = a });24            var result = await Page.EvaluateExpressionAsync<ComplexObject>("complexObject({bar: 'baz'})");25            Assert.Equal("baz", result.Foo["bar"]);26        }27        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should throw for conflicting function names")]28        public async Task ShouldThrowForConflictingFunctionNames()29        {30            await Page.ExposeFunctionAsync("woof", (string a) => $"{a} woof");31            var exception = await Assert.ThrowsAsync<ArgumentException>(async () => await Page.ExposeFunctionAsync("woof", (string a) => $"{a} woof"));32            Assert.Equal("Failed to add page.exposeFunction('woof'): window['woof'] already exists", exception.Message);33        }34        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should survive cross-process navigation")]35        public async Task ShouldSurviveCrossProcessNavigation()36        {37            await Page.ExposeFunctionAsync("woof", (string a) => $"{a} woof");38            await Page.GoToAsync(TestConstants.EmptyPage);39            var result = await Page.EvaluateExpressionAsync<string>("woof('dog')");40            Assert.Equal("

PageExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Tests.Attributes;5{6    [Collection(TestConstants.TestFixtureCollectionName)]7    {8        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work")]9        public async Task ShouldWork()10        {11            await Page.ExposeFunctionAsync("woof", () => "WOOOF");12            var result = await Page.EvaluateFunctionAsync<string>("async() => { return await woof(); }");13            Assert.Equal("WOOOF", result);14        }15        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should throw in case of multiple registrations")]16        public async Task ShouldThrowInCaseOfMultipleRegistrations()17        {18            await Page.ExposeFunctionAsync("woof", () => "doggo");19            var exception = await Assert.ThrowsAsync<Exception>(() => Page.ExposeFunctionAsync("woof", () => "doggo"));20            Assert.Equal("Failed to add page method 'woof': window[\"woof\"] already exists", exception.Message);21        }22        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should survive cross-process navigation")]23        public async Task ShouldSurviveCrossProcessNavigation()24        {25            await Page.ExposeFunctionAsync("woof", () => "doggo");26            var response = await Page.GoToAsync(TestConstants.EmptyPage);27            Assert.True(response.Ok);28            var result = await Page.EvaluateFunctionAsync<string>("async() => { return await woof(); }");29            Assert.Equal("doggo", result);30        }31        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should await returned promise")]32        public async Task ShouldAwaitReturnedPromise()33        {34            await Page.ExposeFunctionAsync("woof", () => Task.FromResult("WOOF"));35            var result = await Page.EvaluateFunctionAsync<string>("async() => { return await woof(); }");36            Assert.Equal("WOOF", result);37        }38        [PuppeteerTest("page.spec.ts", "Page.exposeFunction", "should work right after cross-site navigation")]

PageExposeFunctionAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2await page.ExposeFunctionAsync("add", (Func<int, int, int>)((a, b) => a + b));3var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");4Console.WriteLine(result);5using System;6using System.Threading.Tasks;7using Xunit;8using Xunit.Abstractions;9{10    [Collection("PuppeteerLoaderFixture collection")]11    {12        public ExposeFunctionTests(ITestOutputHelper output) : base(output)13        {14        }15        public async Task ShouldWork()16        {17            await Page.ExposeFunctionAsync("add", (Func<int, int, int>)((a, b) => a + b));18            var result = await Page.EvaluateExpressionAsync<int>("add(5, 6)");19            Assert.Equal(11, result);20        }21    }22}23using System;24using System.Collections.Generic;25using System.Text;26{27    {28        public PageTests(ITestOutputHelper output) : base(output)29        {30        }31    }32}33using System;34using System.Collections.Generic;35using System.Text;36{37    {38        public PuppeteerBaseTest(ITestOutputHelper output)39        {40            Output = output;41        }42        public ITestOutputHelper Output { get; }43        public void Dispose()44        {

PageExposeFunctionAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2await page.ExposeFunctionAsync("add", (int a, int b) => a + b);3var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");4Console.WriteLine(result);5await browser.CloseAsync();6var page = await browser.NewPageAsync();7await page.ExposeFunctionAsync("readFile", async (string path) => File.ReadAllText(path));8var result = await page.EvaluateExpressionAsync<string>("readFile('/etc/hosts')");9Console.WriteLine(result);10await browser.CloseAsync();11var page = await browser.NewPageAsync();12await page.ExposeFunctionAsync("add", (int a, int b) => a + b);13var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");14Console.WriteLine(result);15await browser.CloseAsync();16var page = await browser.NewPageAsync();17await page.ExposeFunctionAsync("add", (int a, int b) => a + b);18var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");19Console.WriteLine(result);20await browser.CloseAsync();21var page = await browser.NewPageAsync();22await page.ExposeFunctionAsync("add", (int a, int b) => a + b);23var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");24Console.WriteLine(result);25await browser.CloseAsync();26var page = await browser.NewPageAsync();

PageExposeFunctionAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2await page.ExposeFunctionAsync("add", (Func<int, int, int>)Add);3var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");4Assert.Equal(11, result);5var page = await browser.NewPageAsync();6await page.ExposeFunctionAsync("readFile", (Func<string, Task<string>>)ReadFileAsync);7var result = await page.EvaluateExpressionAsync<string>("readFile('test.json')");8Assert.Equal("hello", result);9var page = await browser.NewPageAsync();10await page.ExposeFunctionAsync("add", (Func<int, int, int>)Add);11await page.EvaluateExpressionAsync("async function() { return await add(5, 6); }");12var page = await browser.NewPageAsync();13await page.ExposeFunctionAsync("readFile", (Func<string, Task<string>>)ReadFileAsync);14await page.EvaluateExpressionAsync("async function() { return await readFile('test.json'); }");15var page = await browser.NewPageAsync();16await page.ExposeFunctionAsync("add", (Func<int, int, int>)Add);17await page.EvaluateFunctionAsync("async function() { return await add(5, 6); }");18var page = await browser.NewPageAsync();19await page.ExposeFunctionAsync("readFile", (Func<string, Task<string>>)ReadFileAsync);20await page.EvaluateFunctionAsync("async function() { return await readFile('test.json'); }");

PageExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using System.IO;5{6    {7        public async Task ShouldWork()8        {9            await Page.ExposeFunctionAsync("woof", () => "WOOF WOOF");10            var result = await Page.EvaluateExpressionAsync<string>("woof()");11            Assert.Equal("WOOF WOOF", result);12        }13        public async Task ShouldWorkWithHandles()14        {15            await Page.ExposeFunctionAsync("add", (int a, int b) => a + b);16            var result = await Page.EvaluateExpressionAsync<int>("add(5, 6)");17            Assert.Equal(11, result);18        }19        public async Task ShouldWorkWithComplexObjects()20        {21            await Page.ExposeFunctionAsync("complexObject", () => new22            {23            });24            var result = await Page.EvaluateExpressionAsync<string>("complexObject().foo");25            Assert.Equal("bar!", result);26        }27        public async Task ShouldAwaitReturnedPromise()28        {29            await Page.ExposeFunctionAsync("asyncAdd", (int a, int b) => Task.FromResult(a + b));30            var result = await Page.EvaluateExpressionAsync<int>("asyncAdd(5, 6)");31            Assert.Equal(11, result);32        }33        public async Task ShouldWorkWithElementHandle()34        {35            await Page.SetContentAsync("<html><body><div class=\"tweet\"><div class=\"like\">100</div><div class=\"retweets\">10</div></div></body></html>");36            await Page.ExposeFunctionAsync("getLikes", (ElementHandle element) => element.QuerySelectorAsync(".like").Result.EvaluateFunctionAsync<int>("node => node.innerText"));37            var result = await Page.EvaluateExpressionAsync<int>("getLikes(document.querySelector('.tweet'))");38            Assert.Equal(100, result);39        }40        public async Task ShouldThrowExceptionInPageContext()41        {42            await Page.ExposeFunctionAsync("woof", () => throw new Exception("WOOF WOOF"));43            var exception = await Assert.ThrowsAsync<EvaluationFailedException>(()44                => Page.EvaluateExpressionAsync("woof()")45            );46            Assert.Contains("WOOF W

PageExposeFunctionAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2await page.ExposeFunctionAsync("add", (Func<int, int, int>)((a, b) => a + b));3var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");4var page = await browser.NewPageAsync();5await page.ExposeFunctionAsync("add", (Func<int, int, int>)((a, b) => a + b));6var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");7var page = await browser.NewPageAsync();8await page.ExposeFunctionAsync("add", (Func<int, int, int>)((a, b) => a + b));9var result = await page.EvaluateExpressionAsync<int>("add(5, 6)");

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