Selenium - Automating UI Testing for Websites using Visual Studio Unit Tests

Selenium is a well-known open source tool for UI automation of websites across a range of browsers. To know more, please refer http://seleniumhq.org/

A huge benefit of using Selenium is that you don’t need an interactive desktop session to run the automated UI tests.

Here we will discuss about integrating Selenium with Visual Studio Unit Tests written in C#

Test

·         Open Bing http://www.bing.com

·         Search for James Bond

·         Verify the results contain a Wikipedia link for James Bond

Steps

·         Download the IE Driver (needed only for running tests in IE) and the C# Client Drivers from http://seleniumhq.org/download/

·         Create a Unit Test Project in Visual Studio using File-New-Project->Test->Test Project

·         Add a folder called Dependencies and add the following files with Copy Always to Output:

o   WebDriver.dll

o   IEDriverServer.exe

o   Ionic.Zip.dll

o   Newtonsoft.Json.dll

·         Add a Reference to WebDriver.dll

·         Make sure Enable Deployment is checked in the Test Settings File, see http://msdn.microsoft.com/en-us/library/ms182475(v=vs.90).aspx

·         Import the following namespaces

using Microsoft.VisualStudio.TestTools.UnitTesting;

using OpenQA.Selenium;

using OpenQA.Selenium.IE;

using System.Drawing.Imaging;

·         Create a Test Class with DeploymentItem Attribute   

[TestClass]
[DeploymentItem("Dependencies\\IEDriverServer.exe")]

public class IETests

·         Create a web driver in Class Initialize and Quit in Class Cleanup

private static InternetExplorerDriver _webDriver;       

[ClassInitialize()]

public static void MyClassInitialize(TestContext testContext)

{

            _webDriver = new InternetExplorerDriver(new InternetExplorerOptions() {IntroduceInstabilityByIgnoringProtectedModeSettings = true});

       }

 

[ClassCleanup()]

public static void MyClassCleanup()

       {

            _webDriver.Quit();

       }

 

       private TestContext testContextInstance;    

       public TestContext TestContext

       {

            get

            {

                return testContextInstance;

            }

            set

            {

                testContextInstance = value;

            }

       } 

·         Create a Test Method

[TestMethod]

       public void TestBing()

       {

            // Test Case Steps

            _webDriver.Navigate().GoToUrl("http://www.bing.com");

            IWebElement search = _webDriver.FindElement(By.Name("q"));

            IWebElement go = _webDriver.FindElement(By.Name("go")); 

            search.SendKeys("james bond");

            go.Click(); 

            // Save screenshot if required

            Screenshot screenshot = _webDriver.GetScreenshot();

            screenshot.SaveAsFile("Result.png", ImageFormat.Png); 

            // Verfication

            IWebElement msWebsite =

                _webDriver.FindElement(

                    By.XPath(

                        "//a[@href='http://en.wikipedia.org/wiki/James_Bond']")); 

            Assert.IsNotNull(msWebsite, "Could not find wikipedia link for James Bond");

       } 

·         To test with Firefox, we can similarly create a Firefox web driver

private static FirefoxDriver _webDriver;

 Troubleshooting

If you see the error Class Initialization method Selenium.IETests.MyClassInitialize threw exception. System.InvalidOperationException: System.InvalidOperationException: Unexpected error launching Internet Explorer. Protected Mode settings are not the same for all zones. Enable Protected Mode must be set to the same value (enabled or disabled) for all zones. (NoSuchDriver).

This could be if you instantiated the IE Driver using new InternetExplorerDriver()
The fix is to either use new InternetExplorerDriver(new InternetExplorerOptions() IntroduceInstabilityByIgnoringProtectedModeSettings = true})

Or enable Protected Mode setting for all zones. Go to Tools->Internet Option->Security and check “Enable Protected Mode” for all zones.