How to test gestures with Selenium using ChromeDriver?

Question

Based on the Mobile Emulation documentation and TouchActions Class I come up with the following code but I got exception: The IWebDriver object must implement or wrap a driver that implements IHasTouchScreen.

namespace Example
{
    using Microsoft.VisualStudio.TestTools.UnitTesting;
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;

    [TestClass]
    public class ExampleTest
    {
        IWebDriver chromeDriver;

        [TestInitialize]
        public void Init()
        {
            var chromeOptions = new ChromeOptions();
            chromeOptions.EnableMobileEmulation("Nexus 6P"); // Allows the Chrome browser to emulate a mobile device.
            chromeDriver = new ChromeDriver(chromeOptions);
        }

        [TestMethod]
        public void ExampleTestMethod()
        {
            chromeDriver.Navigate().GoToUrl("https://example.com");
            IWebElement link = chromeDriver.FindElement(By.CssSelector("a"));

            // Threw exception:
            // The IWebDriver object must implement or wrap a driver that implements IHasTouchScreen.
            var touchActions = new OpenQA.Selenium.Interactions.TouchActions(chromeDriver);

            touchActions
                .SingleTap(link)
                .Build()
                .Perform();
        }

        [TestCleanup]
        public void Cleanup()
        {
            chromeDriver.Quit();
        }
    }
}

I checked the documentation but there is no info about how to enable touch gestures on ChromeDriver.

Answer 1

The problem is ChromeDriver does not have TouchScreen by default.
We need to create a new class to support it, just need to implement IHasTouchScreen interface, with RemoteTouchScreen class.

namespace Example
{
    using Microsoft.VisualStudio.TestTools.UnitTesting;
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;
    using OpenQA.Selenium.Remote;

    public class ChromeDriverWithTouchScreen : ChromeDriver, IHasTouchScreen
    {
        public ITouchScreen TouchScreen => new RemoteTouchScreen(this);

        public ChromeDriverWithTouchScreen(ChromeOptions options) : base(options)
        {

        }
    }

    [TestClass]
    public class ExampleTest
    {
        IWebDriver chromeDriver;

        [TestInitialize]
        public void Init()
        {
            var chromeOptions = new ChromeOptions();
            chromeOptions.EnableMobileEmulation("Nexus 6P"); // Allows the Chrome browser to emulate a mobile device.
            chromeDriver = new ChromeDriverWithTouchScreen(chromeOptions);
        }

        [TestMethod]
        public void ExampleTestMethod()
        {
            chromeDriver.Navigate().GoToUrl("https://example.com");
            IWebElement link = chromeDriver.FindElement(By.CssSelector("a"));

            // Threw exception:
            // The IWebDriver object must implement or wrap a driver that implements IHasTouchScreen.
            var touchActions = new OpenQA.Selenium.Interactions.TouchActions(chromeDriver);

            touchActions
                .SingleTap(link)
                .Build()
                .Perform();
        }

        [TestCleanup]
        public void Cleanup()
        {
            chromeDriver.Quit();
        }
    }
}