TouchScreen always throw System.InvalidOperationException

[gis2all]

I want to simulate the mouse scrolling action, but I found that throwing an exception whenever I use the TouchScreen class.

Here I debug the WebDriverAPI example unit test and I get this error:

Error message in cmd:

{"status":13,"value":{"error":"unknown error","message":"An unknown error occurred in the remote end while processing the command."}}

I tried to troubleshoot

1. WinAppDriver.msi version, I have installed v1.1.1 and v1.1
2. Nuget package: Microsoft.WinAppDriver.Appium.WebDriver Selenium.Support and Selenium.WebDriver -- I tried 3.8.0, 3.9.0, 3.10.0, 3.14.0
3. Close Window Firewall and Defender
4. Run WinAppDriver.exe and VS2017 with administrator privileges

But the above attempts have failed, and the issue still exists.

My test environment is as follows

1. Window 10 Enterprise Version 1809 (OS Build 17763.720)
2. Visual Studio 2017 Professional 15.9 Release
3. WinAppDriver.exe v1.1.1
4. Nuget Microsoft.WinAppDriver.Appium.WebDriver 1.0.1-Preview Selenium.Support 3.8.0 Selenium.WebDriver 3.8.0

[hassanuz]

Hi @Assault72,

Can you please paste what WinAppDriver.exe console logs are showing?

A successful response should look something like the following:

========================================== POST /session/0A543F58-F490-4D6A-8690-B4FF7A48D4CA/touch/click HTTP/1.1 Accept: application/json, image/png Content-Length: 28 Content-Type: application/json;charset=utf-8 Host: 127.0.0.1:4723

{"element":"42.722532.4.16"} HTTP/1.1 200 OK Content-Length: 63 Content-Type: application/json

{"sessionId":"0A543F58-F490-4D6A-8690-B4FF7A48D4CA","status":0}

==========================================

Can you also try using the Actions API and see if you are able to perform a touch action using it? Check out our ActionsTouch tests as reference.

Thanks

[gis2all]

@hassanuz Response as below:

POST /session/770D500C-940B-4C97-B71C-9898E9E60ACC/touch/click HTTP/1.1 Accept: application/json, image/png Content-Length: 29 Content-Type: application/json;charset=utf-8 Host: 127.0.0.1:4723

{"element":"42.1314982.4.15"} HTTP/1.1 500 Internal Error Content-Length: 133 Content-Type: application/json

{"status":13,"value":{"error":"unknown error","message":"An unknown error occurred in the remote end while processing the command."}}

Try work with TouchActions, thow this exception

I guess the app itself needs to support part of the touch interfaces in Selenium. If it doesn't implement these interfaces, can't call the relevant API.

[FrankieHoomer]

@gis2all Try to create a wrapper over WindowsDriver and implement the IHasTouchScreen interface like follows:

    public class WindowsExtendedDriver : WindowsDriver<WindowsElement>, IHasTouchScreen
    {
        public WindowsExtendedDriver(Uri remoteAddress, AppiumOptions AppiumOptions) : base(remoteAddress, AppiumOptions)
        {
            TouchScreen = new RemoteTouchScreen(this);
        }

        public ITouchScreen TouchScreen { get; }
    }