Cross-Browser testing with Selenium WebDriver using C#

Here is one easy solution for your problem. You can use NUnit to execute selenium tests on multiple browsers. All you need to do is download Nunit from NuGet and reference it in your project. Here is a sample code which works just fine.

using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium.IE;
using OpenQA.Selenium.Chrome;

namespace MultipleBrowserTesting
{
[TestFixture(typeof(FirefoxDriver))]
[TestFixture(typeof(ChromeDriver))]
[TestFixture(typeof(InternetExplorerDriver))]
public class BlogTest<TWebDriver> where TWebDriver : IWebDriver, new()
{
    private IWebDriver _driver;

    [Test]
    public void Can_Visit_Google()
    {
        _driver = new TWebDriver();

        // Navigate
        _driver.Manage().Window.Maximize();
        _driver.Navigate().GoToUrl("http://www.google.com/");
    }

    [TestFixtureTearDown]
    public void FixtureTearDown()
    {
        if (_driver != null) 
            _driver.Close();
    }
}
}

If you are using Visual Studio, you can make use of ordered tests. What I did, I have created three separate test cases namely SetIE, SetChrome and SetFireFox.

 [TestMethod]
    public void SetIE()
    {
        Browser.Type = "IE";

    }


    [TestMethod]
    public void SetFireFox()
    {
        Browser.Type = "FF";

    }


    [TestMethod]
    public void SetChrome()
    {

        Browser.Type = "CR";
    }

These methods just set a string in a class variable and do nothing else. Create a method to initialize your webDriver

   IWebDriver WebDriver = null;

public static void InitializeDriver(TestContext t)
    {
      if (WebDriver == null)
            {

                string DRIVER_PATH = @"C:\automation\driversFolder\";

                switch (Browser.Type)
                {
                    case "IE":

                        WebDriver = new InternetExplorerDriver(DRIVER_PATH);                         

                        break;

                    case "FF": 

                        WebDriver = new FirefoxDriver();
                        break;


                    case "CR":

                        WebDriver = new ChromeDriver(DRIVER_PATH);
                        break;

                    default:
                        WebDriver = new FirefoxDriver();                           
                        break;

                }

            }

    }

See this blog post which more or less describes this solution.

Now what you have to do is to create an ordered test for IE. Put the first test case SetIE there. and below that put your other test case like login etc. Now you have one suite ready to execute your test cases in IE. Similary create ordered tests for Chrome and FireFox. After that , create a fourth orderedtest named "All Browsers". Inside it ,place all of your 3 ordered tests.

After that , here is what you can do now. A) If you want to run a single test case against a specific browser, just change the browser name in your class and run that test case.

B) if you want to run all test against a particular browser, just execute the ordered test of that particular broser .

C) If you want to run all tests on all browsers, run your fourth ordered test.

I hope it helps.