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

Copied to Clipboard!

How to use OnMessage method of Microsoft.Playwright.Transport.Channels.ChannelBase class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Transport.Channels.ChannelBase.OnMessage

FrameChannel.cs

Source:FrameChannel.cs

...38        {39        }40        internal event EventHandler<FrameNavigatedEventArgs> Navigated;41        internal event EventHandler<FrameChannelLoadStateEventArgs> LoadState;42        internal override void OnMessage(string method, JsonElement? serverParams)43        {44            switch (method)45            {46                case "navigated":47                    var e = serverParams?.ToObject<FrameNavigatedEventArgs>(Connection.DefaultJsonSerializerOptions);48                    if (serverParams.Value.TryGetProperty("newDocument", out var documentElement))49                    {50                        e.NewDocument = documentElement.ToObject<NavigateDocument>(Connection.DefaultJsonSerializerOptions);51                    }52                    Navigated?.Invoke(this, e);53                    break;54                case "loadstate":55                    LoadState?.Invoke(56                        this,...

Connection.cs

Source:Connection.cs

...63        public ConcurrentDictionary<string, IChannelOwner> Objects { get; } = new();64        internal AsyncLocal<List<ApiZone>> ApiZone { get; } = new();65        public bool IsClosed { get; private set; }66        internal bool IsRemote { get; set; }67        internal Func<object, Task> OnMessage { get; set; }68        internal JsonSerializerOptions DefaultJsonSerializerOptions { get; }69        public void Dispose()70        {71            Dispose(true);72            GC.SuppressFinalize(this);73        }74        internal Task<JsonElement?> SendMessageToServerAsync(75            string guid,76            string method,77            object args = null)78            => SendMessageToServerAsync<JsonElement?>(guid, method, args);79        internal Task<T> SendMessageToServerAsync<T>(80            string guid,81            string method,82            object args = null) => WrapApiCallAsync(() => InnerSendMessageToServerAsync<T>(guid, method, args));83        private async Task<T> InnerSendMessageToServerAsync<T>(84            string guid,85            string method,86            object args = null)87        {88            if (IsClosed)89            {90                throw new PlaywrightException($"Connection closed ({_reason})");91            }92            int id = Interlocked.Increment(ref _lastId);93            var tcs = new TaskCompletionSource<JsonElement?>(TaskCreationOptions.RunContinuationsAsynchronously);94            var callback = new ConnectionCallback95            {96                TaskCompletionSource = tcs,97            };98            _callbacks.TryAdd(id, callback);99            var sanitizedArgs = new Dictionary<string, object>();100            if (args != null)101            {102                if (args is IDictionary<string, object> dictionary && dictionary.Keys.Any(f => f != null))103                {104                    foreach (var kv in dictionary)105                    {106                        if (kv.Value != null)107                        {108                            sanitizedArgs.Add(kv.Key, kv.Value);109                        }110                    }111                }112                else113                {114                    foreach (PropertyDescriptor propertyDescriptor in TypeDescriptor.GetProperties(args))115                    {116                        object obj = propertyDescriptor.GetValue(args);117                        if (obj != null)118                        {119#pragma warning disable CA1845 // Use span-based 'string.Concat' and 'AsSpan' instead of 'Substring120                            string name = propertyDescriptor.Name.Substring(0, 1).ToLower() + propertyDescriptor.Name.Substring(1);121#pragma warning restore CA2000 // Use span-based 'string.Concat' and 'AsSpan' instead of 'Substring122                            sanitizedArgs.Add(name, obj);123                        }124                    }125                }126            }127            await _queue.EnqueueAsync(() =>128            {129                var message = new MessageRequest130                {131                    Id = id,132                    Guid = guid,133                    Method = method,134                    Params = sanitizedArgs,135                    Metadata = ApiZone.Value[0],136                };137                TraceMessage("pw:channel:command", message);138                return OnMessage(message);139            }).ConfigureAwait(false);140            var result = await tcs.Task.ConfigureAwait(false);141            if (typeof(T) == typeof(JsonElement?))142            {143                return (T)(object)result?.Clone();144            }145            else if (result == null)146            {147                return default;148            }149            else if (typeof(ChannelBase).IsAssignableFrom(typeof(T)) || typeof(ChannelBase[]).IsAssignableFrom(typeof(T)))150            {151                var enumerate = result.Value.EnumerateObject();152                return enumerate.Any()153                    ? enumerate.FirstOrDefault().Value.ToObject<T>(DefaultJsonSerializerOptions)154                    : default;155            }156            else157            {158                return result.Value.ToObject<T>(DefaultJsonSerializerOptions);159            }160        }161        internal IChannelOwner GetObject(string guid)162        {163            Objects.TryGetValue(guid, out var result);164            return result;165        }166        internal void MarkAsRemote() => IsRemote = true;167        internal Task<PlaywrightImpl> InitializePlaywrightAsync()168        {169            return _rootObject.InitializeAsync();170        }171        internal void OnObjectCreated(string guid, IChannelOwner result)172        {173            Objects.TryAdd(guid, result);174        }175        internal void Dispatch(PlaywrightServerMessage message)176        {177            if (message.Id.HasValue)178            {179                TraceMessage("pw:channel:response", message);180                if (_callbacks.TryRemove(message.Id.Value, out var callback))181                {182                    if (message.Error != null)183                    {184                        callback.TaskCompletionSource.TrySetException(CreateException(message.Error.Error));185                    }186                    else187                    {188                        callback.TaskCompletionSource.TrySetResult(message.Result);189                    }190                }191                return;192            }193            TraceMessage("pw:channel:event", message);194            try195            {196                if (message.Method == "__create__")197                {198                    var createObjectInfo = message.Params.Value.ToObject<CreateObjectInfo>(DefaultJsonSerializerOptions);199                    CreateRemoteObject(message.Guid, createObjectInfo.Type, createObjectInfo.Guid, createObjectInfo.Initializer);200                    return;201                }202                if (message.Method == "__dispose__")203                {204                    Objects.TryGetValue(message.Guid, out var disableObject);205                    disableObject?.DisposeOwner();206                    return;207                }208                Objects.TryGetValue(message.Guid, out var obj);209                obj?.Channel?.OnMessage(message.Method, message.Params);210            }211            catch (Exception ex)212            {213                DoClose(ex);214            }215        }216        private void CreateRemoteObject(string parentGuid, ChannelOwnerType type, string guid, JsonElement? initializer)217        {218            IChannelOwner result = null;219            var parent = string.IsNullOrEmpty(parentGuid) ? _rootObject : Objects[parentGuid];220#pragma warning disable CA2000 // Dispose objects before losing scope221            switch (type)222            {223                case ChannelOwnerType.Artifact:...

ElementHandleChannel.cs

Source:ElementHandleChannel.cs

...39            Object = owner;40        }41        internal event EventHandler<PreviewUpdatedEventArgs> PreviewUpdated;42        public new ElementHandle Object { get; set; }43        internal override void OnMessage(string method, JsonElement? serverParams)44        {45            switch (method)46            {47                case "previewUpdated":48                    PreviewUpdated?.Invoke(this, new() { Preview = serverParams.Value.GetProperty("preview").ToString() });49                    break;50            }51        }52        internal Task<ElementHandleChannel> WaitForSelectorAsync(string selector, WaitForSelectorState? state, float? timeout, bool? strict)53        {54            var args = new Dictionary<string, object>55            {56                ["selector"] = selector,57                ["timeout"] = timeout,...

BrowserType.cs

Source:BrowserType.cs

...161                browser?.DidClose();162                connection.DoClose(closeError != null ? closeError : DriverMessages.BrowserClosedExceptionMessage);163            }164            pipe.Closed += (_, _) => OnPipeClosed();165            connection.OnMessage = async (object message) =>166            {167                try168                {169                    await pipe.SendAsync(message).ConfigureAwait(false);170                }171                catch (Exception e) when (DriverMessages.IsSafeCloseError(e))172                {173                    // swallow exception174                }175                catch176                {177                    OnPipeClosed();178                }179            };...

ChannelBase.cs

Source:ChannelBase.cs

...32            Connection = connection;33        }34        public string Guid { get; }35        public Connection Connection { get; }36        internal virtual void OnMessage(string method, JsonElement? serverParams)37        {38        }39    }40}...

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Transport.Channels;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static async Task Main(string[] args)11        {12            using var playwright = await Playwright.CreateAsync();13            await using var browser = await playwright.Chromium.LaunchAsync();14            var page = await browser.NewPageAsync();15            await page.TypeAsync("input[title='Search']", "Playwright");16            await page.PressAsync("input[title='Search']", "Enter");17            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot.png" });18            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);19            await page.WaitForSelectorAsync("h3");20            await page.ClickAsync("h3");21            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot2.png" });22        }23    }24}25using Microsoft.Playwright;26using Microsoft.Playwright.Transport.Channels;27using System;28using System.Collections.Generic;29using System.Linq;30using System.Text;31using System.Threading.Tasks;32{33    {34        static async Task Main(string[] args)35        {36            using var playwright = await Playwright.CreateAsync();37            await using var browser = await playwright.Chromium.LaunchAsync();38            var page = await browser.NewPageAsync();39            await page.TypeAsync("input[title='Search']", "Playwright");40            await page.PressAsync("input[title='Search']", "Enter");41            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot.png" });42            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);43            await page.WaitForSelectorAsync("h3");44            await page.ClickAsync("h3");45            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot2.png" });46        }47    }48}49using Microsoft.Playwright;50using Microsoft.Playwright.Transport.Channels;51using System;52using System.Collections.Generic;

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2{3    {4        static async Task Main(string[] args)5        {6            await using var playwright = await Playwright.CreateAsync();7            await using var browser = await playwright.Chromium.LaunchAsync();8            await using var context = await browser.NewContextAsync();9            var page = await context.NewPageAsync();10            var element = await page.QuerySelectorAsync("input[name=q]");11            await element.TypeAsync("Hello World");12            var element2 = await page.QuerySelectorAsync("input[name=btnK]");13            await element2.ClickAsync();14            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);15            await element3.ClickAsync();16            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);17            await page.ScreenshotAsync("screenshot.png");18        }19    }20}21using Microsoft.Playwright;22{23    {24        static async Task Main(string[] args)25        {26            await using var playwright = await Playwright.CreateAsync();27            await using var browser = await playwright.Chromium.LaunchAsync();28            await using var context = await browser.NewContextAsync();29            var page = await context.NewPageAsync();30            var element = await page.QuerySelectorAsync("input[name=q]");31            await element.TypeAsync("Hello World");32            var element2 = await page.QuerySelectorAsync("input[name=btnK]");33            await element2.ClickAsync();34            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);35            await element3.ClickAsync();36            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);37            await page.ScreenshotAsync("screenshot.png");38        }39    }40}41using Microsoft.Playwright;42{43    {44        static async Task Main(string[] args)45        {

OnMessage

Using AI Code Generation

1{2    public static async Task Main(string[] args)3    {4        var playwright = await Playwright.CreateAsync();5        var browser = await playwright.Chromium.LaunchAsync();6        var page = await browser.NewPageAsync();7        await page.ScreenshotAsync("example.png");8        await browser.CloseAsync();9    }10}11{12    public static async Task Main(string[] args)13    {14        var playwright = await Playwright.CreateAsync();15        var browser = await playwright.Chromium.LaunchAsync();16        var page = await browser.NewPageAsync();17        await page.ScreenshotAsync("example.png");18        await browser.CloseAsync();19    }20}21{22    public static async Task Main(string[] args)23    {24        var playwright = await Playwright.CreateAsync();25        var browser = await playwright.Chromium.LaunchAsync();26        var page = await browser.NewPageAsync();27        await page.ScreenshotAsync("example.png");28        await browser.CloseAsync();29    }30}31{32    public static async Task Main(string[] args)33    {34        var playwright = await Playwright.CreateAsync();35        var browser = await playwright.Chromium.LaunchAsync();36        var page = await browser.NewPageAsync();37        await page.ScreenshotAsync("example.png");38        await browser.CloseAsync();39    }40}41{42    public static async Task Main(string[] args)43    {44        var playwright = await Playwright.CreateAsync();45        var browser = await playwright.Chromium.LaunchAsync();46        var page = await browser.NewPageAsync();

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Transport.Channels;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Reflection;7using System.Text;8using System.Threading.Tasks;9{10    {11        static async Task Main(string[] args)12        {13            using var playwright = await Playwright.CreateAsync();14            await using var browser = await playwright.Chromium.LaunchAsync();15            var page = await browser.NewPageAsync();16            var channel = page.Channel;17            var onMessageMethod = channel.GetType().GetMethod("OnMessage", BindingFlags.NonPublic | BindingFlags.Instance);18            channel.MessageReceived += (sender, e) => {19                Console.WriteLine(e.Message);20            };21            await page.EvaluateAsync(@"() => {22                const button = document.querySelector('button');23                button.addEventListener('click', () => {24                    button.innerText = 'Clicked';25                });26            }");27            await page.ClickAsync("text=Get started");28            await Task.Delay(10000);29        }30    }31}

OnMessage

Using AI Code Generation

1ChannelBase channel = (ChannelBase)page;2channel.OnMessage += Channel_OnMessage;3PageChannel pageChannel = (PageChannel)page;4pageChannel.OnMessage += PageChannel_OnMessage;5PageChannel pageChannel = (PageChannel)page;6pageChannel.OnMessage += PageChannel_OnMessage;7PageChannel pageChannel = (PageChannel)page;8pageChannel.OnMessage += PageChannel_OnMessage;9PageChannel pageChannel = (PageChannel)page;10pageChannel.OnMessage += PageChannel_OnMessage;11PageChannel pageChannel = (PageChannel)page;12pageChannel.OnMessage += PageChannel_OnMessage;13PageChannel pageChannel = (PageChannel)page;14pageChannel.OnMessage += PageChannel_OnMessage;15PageChannel pageChannel = (PageChannel)page;16pageChannel.OnMessage += PageChannel_OnMessage;17PageChannel pageChannel = (PageChannel)page;18pageChannel.OnMessage += PageChannel_OnMessage;19PageChannel pageChannel = (PageChannel)page;20pageChannel.OnMessage += PageChannel_OnMessage;

OnMessage

Using AI Code Generation

1{2    using System;3    using System.Collections.Generic;4    using System.Diagnostics;5    using System.Linq;6    using System.Text.Json;7    using System.Threading;8    using System.Threading.Tasks;9    using Microsoft.Playwright.Core;10    using Microsoft.Playwright.Transport.Protocol;11    {12        private readonly Dictionary<string, object> _guidToChannel = new Dictionary<string, object>();13        private readonly Dictionary<Type, object> _guidToOwner = new Dictionary<Type, object>();14        private readonly Dictionary<string, object> _guidToType = new Dictionary<string, object>();15        private readonly List<ChannelBase> _objects = new List<ChannelBase>();16        private readonly List<ChannelOwnerBase> _owners = new List<ChannelOwnerBase>();17        private readonly List<ChannelBase> _parents = new List<ChannelBase>();18        private readonly List<ChannelBase> _children = new List<ChannelBase>();19        private readonly List<ChannelBase> _removedObjects = new List<ChannelBase>();20        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForObjectTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();21        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForObjectTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();22        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForOwnerTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();23        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForOwnerTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();24        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForTypeTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();25        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForTypeTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();26        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForParentTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();27        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForParentTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();

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.