Running Selenium tests in multiple browsers one by one with C # NUnit

Question

I am looking for a recommended / best way for Selenium tests to run in multiple browsers one by one. The website I'm testing is small, so I don't need a parallel solution yet.

I have the usual test setup methods with [SetUp] , [TearDown] and [Test] . Of course, SetUp creates an instance of the new ISelenium object with any browser that I want to test with.

So what I want to do is programmatically say: this test will run in Chrome, IE and Firefox browsers. How to do it?

EDIT:

This might help a bit. We use CruiseControl.NET to run NUnit tests after a successful build. Is there a way to pass the parameter to the NUnit executable, and then use this parameter in the test? Thus, we could start NUnit several times with different browser options.

Answer 1

NUnit 2.5+ now supports Generic Test Fixtures, which makes testing across multiple browsers very easy. http://www.nunit.org/index.php?p=testFixture&r=2.5

Running the following example will run GoogleTest twice, once in Firefox and once in IE.

 using NUnit.Framework; using OpenQA.Selenium; using OpenQA.Selenium.Firefox; using OpenQA.Selenium.IE; using System.Threading; namespace SeleniumTests { [TestFixture(typeof(FirefoxDriver))] [TestFixture(typeof(InternetExplorerDriver))] public class TestWithMultipleBrowsers<TWebDriver> where TWebDriver : IWebDriver, new() { private IWebDriver driver; [SetUp] public void CreateDriver () { this.driver = new TWebDriver(); } [Test] public void GoogleTest() { driver.Navigate().GoToUrl("http://www.google.com/"); IWebElement query = driver.FindElement(By.Name("q")); query.SendKeys("Bread" + Keys.Enter); Thread.Sleep(2000); Assert.AreEqual("bread - Google Search", driver.Title); driver.Quit(); } } } 

Answer 2

This is a recurring question and is addressed in several ways:

• The Factory method creates your ISelenium object. You have a helper class with the static getSelenium method. This method reads in some external configuration, which has a property that defines the browser that you want as a string. In your getSelenium, you then configure your browser accordingly. here is a handy entry on using configuration files from NUnit http://blog.coryfoy.com/2005/08/nunit-app-config-files-its-all-about-the-nunit-file/

• Others have success with introducing a browser through an IoC container. I really like this because TestNG works great with Guice in Java, but I'm not sure how easy it is to mix NUnit and Ninject, MEF, etc.

Answer 3

This is basically just an extension of the response to alaning (October 21, 2011 at 20:20). My case was similar, I just didn’t want to start with a parameterless constructor (and thus use the default path to the driver executable files). I had a separate folder with drivers that I wanted to test, and this seems to work well:

 [TestFixture(typeof(ChromeDriver))] [TestFixture(typeof(InternetExplorerDriver))] public class BrowserTests<TWebDriver> where TWebDriver : IWebDriver, new() { private IWebDriver _webDriver; [SetUp] public void SetUp() { string driversPath = Environment.CurrentDirectory + @"\..\..\..\WebDrivers\"; _webDriver = Activator.CreateInstance(typeof (TWebDriver), new object[] { driversPath }) as IWebDriver; } [TearDown] public void TearDown() { _webDriver.Dispose(); // Actively dispose it, doesn't seem to do so itself } [Test] public void Tests() { //TestCode } } 

}

Answer 4

I use the list of IWeb drivers to run tests in all browsers, line by line:

 [ClassInitialize] public static void ClassInitialize(TestContext context) { drivers = new List<IWebDriver>(); firefoxDriver = new FirefoxDriver(); chromeDriver = new ChromeDriver(path); ieDriver = new InternetExplorerDriver(path); drivers.Add(firefoxDriver); drivers.Add(chromeDriver); drivers.Add(ieDriver); baseURL = "http://localhost:4444/"; } [ClassCleanup] public static void ClassCleanup() { drivers.ForEach(x => x.Quit()); } ..and then am able to write tests like this: [TestMethod] public void LinkClick() { WaitForElementByLinkText("Link"); drivers.ForEach(x => x.FindElement(By.LinkText("Link")).Click()); AssertIsAllTrue(x => x.PageSource.Contains("test link")); } 

.. where I write my own methods WaitForElementByLinkText and AssertIsAllTrue to perform an operation for each driver and where something fails, I get a message that helps me determine which browsers may crash:

  public void WaitForElementByLinkText(string linkText) { List<string> failedBrowsers = new List<string>(); foreach (IWebDriver driver in drivers) { try { WebDriverWait wait = new WebDriverWait(clock, driver, TimeSpan.FromSeconds(5), TimeSpan.FromMilliseconds(250)); wait.Until((d) => { return d.FindElement(By.LinkText(linkText)).Displayed; }); } catch (TimeoutException) { failedBrowsers.Add(driver.GetType().Name + " Link text: " + linkText); } } Assert.IsTrue(failedBrowsers.Count == 0, "Failed browsers: " + string.Join(", ", failedBrowsers)); } 

IEDriver is painfully slow, but it will have 3 major browsers that run side-by-side tests

Answer 5

Well, one solution is to have shell tests that install the ISelenium object with different browsers. Then they pass this object to all other tests that use it instead of creating a new one, as it was before.

The downside is that I end up with one big test for each browser. Not the best solution. Still looking ...

EDIT:

Spent some more time on this. The solution I came up with is to have a text file in the solution that indicates the browser that will be used for testing. NUnit selects an option when creating a Selenium object.

I use CruiseControl.NET to run automated builds and tests. And instead of just running the test once, I configured it to run them twice. But before each test, I run a command line command that changes the browser in the text configuration file.

 <exec> <executable>cmd</executable> <buildArgs>/C echo firefox C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe > F:\...\selenium_browser.txt</buildArgs> </exec> <exec> <executable>F:\...\NUnit 2.5.7\bin\net-2.0\nunit-console.exe</executable> <baseDirectory>F:\...\bin\Debug</baseDirectory> <buildArgs>F:\...\...nunit /xml:"F:\CCXmlLog\Project\nunit-results.xml" /noshadow</buildArgs> <successExitCodes>0</successExitCodes> <buildTimeoutSeconds>1200</buildTimeoutSeconds> </exec> <exec> <executable>cmd</executable> <buildArgs>/C echo googlechrome C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe > F:\...\selenium_browser.txt</buildArgs> </exec> <exec> <executable>F:\...\NUnit 2.5.7\bin\net-2.0\nunit-console.exe</executable> <baseDirectory>F:\...\bin\Debug</baseDirectory> <buildArgs>F:\...\...nunit /xml:"F:\CCXmlLog\Project\nunit-results.xml" /noshadow</buildArgs> <successExitCodes>0</successExitCodes> <buildTimeoutSeconds>1200</buildTimeoutSeconds> </exec> 

Answer 6

This helped me solve a similar problem. How to run the nUnit test suite with two different settings?

Just install the various browsers in the setup method:]

Answer 7

I was interested to know about the same problem and finally I got a solution

Therefore, when you install the plugin, you can control in which browser the script should be tested.

Function example:

 @Browser:IE @Browser:Chrome Scenario Outline: Add Two Numbers Given I navigated to / And I have entered <SummandOne> into summandOne calculator And I have entered <SummandTwo> into summandTwo calculator When I press add Then the result should be <Result> on the screen Scenarios: | SummandOne | SummandTwo | Result | | 50 | 70 | 120 | | 1 | 10 | 11 | 

Implementation

 [Given(@"I have entered '(.*)' into the commentbox")] public void GivenIHaveEnteredIntoTheCommentbox(string p0) { Browser.Current.FindElement(By.Id("comments")).SendKeys(p0); } 

Additional Information

Answer 8

There should be a better way, but you can use T4 templates to create repeating test classes for each browser - essentially copy automation and - debugging tests for each browser.