Multiple browsers tests with Webinator - Not pretty, but effective.

Example1.cs

 namespace Test
{
    class UnitTest
    {       
        private static MultipleBrowsers _multipleBrowsers;

        [ClassInitialize]
        public static void ClassInitialize(TestContext context)
        {
            _multipleBrowsers = new MultipleBrowsers();
        }

        /// <summary>
        /// Verifies if an alert message is being displayed given an invalid e-mail.
        /// </summary>
        [TestMethod]
        public void ShouldAlertWhenGivenInvalidEmail()
        {
            _multipleBrowsers.RunTest(_ShouldAlertWhenGivenInvalidEmail, 
                                      new Config.AvailableBrowsers[]
                                          {
                                              Config.AvailableBrowsers.InternetExplorer, 
                                              Config.AvailableBrowsers.Firefox,
                                              Config.AvailableBrowsers.Chrome
                                          });
        }

        private void _ShouldAlertWhenGivenInvalidEmail(IWebManager web)
        {
            var invalidEmail = "invalidemail.com";
            var invalidEmailMessage = "Invalid e-mail, please verify and try again.";

            RegisterWith(invalidEmail, web);

            var alertMessage = web.GetText(LocateBy.Xpath("//*[@id='RegistrationMessage']"));
            Assert.IsNotNull(alertMessage);
            Assert.AreEqual(invalidEmailMessage, alertMessage);
        }
    }
}

Example2.cs

 namespace Test
{
    class UnitTest
    {       
        private static MultipleBrowsers _multipleBrowsers;

        [ClassInitialize]
        public static void ClassInitialize(TestContext context)
        {
            _multipleBrowsers = new MultipleBrowsers();
        }

        /// <summary>
        /// Verifies if an alert message is being displayed given an invalid e-mail.
        /// </summary>
        [TestMethod]
        public void ShouldAlertWhenGivenInvalidEmail()
        {
            _multipleBrowsers.RunTest(delegate(IWebManager web)
                {
                    var invalidEmail = "invalidemail.com";
                    var invalidEmailMessage = "Invalid e-mail, please verify and try again.";

                    RegisterWith(invalidEmail, web);

                    var alertMessage =
                        web.GetText(LocateBy.Xpath("//*[@id='RegistrationMessage']"));
                    Assert.IsNotNull(alertMessage);
                    Assert.AreEqual(invalidEmailMessage, alertMessage);
                }, 
            new Config.AvailableBrowsers[]
                {
                    Config.AvailableBrowsers.InternetExplorer, 
                    Config.AvailableBrowsers.Firefox,
                    Config.AvailableBrowsers.Chrome
                });
        }
    }
}

MultipleBrowsers.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using Webinator;

namespace TestHelpers
{
    class MultipleBrowsers
    {
        private Config _config;

        public MultipleBrowsers()
        {
            _config = new Config
            {
                LogScreenshots = true,
                LogLevel = Config.AvailableLogLevels.Verbose,
                BaseUrl = "about:blank",
                Framework = Config.AvailableFrameworks.WebDriver
            };
        }

        public void RunTest(Action<IWebManager> action, Config.AvailableBrowsers[] browsers)
        {
            foreach(var browser in browsers)
            {
                // Diagnostics kinda deprecated, but should do the trick even with MSTest.
                Debug.WriteLine("Running test with " + browser);
                _config.Browser = browser;
                var web = WebManagerFactory.CreateInstance(_config);

                action(web);

                web.CloseBrowser(); 
            }
        }
    }
}

If the test fails for one browser, it will flag the whole test as failed. Disadvantage? I don't think so.
I think this as a safe measure for a feature. If it isn't consistent for one browser, it will get fixed. This process might introduce a bug in another browser.

Ok, found a proper way do this with NUnit: http://stackoverflow.com/a/7854838/1464825