Łukasz Walec: /* Parameters in Selenium WebDriver */

2015-03-07T01:24:13Z

Parameters in Selenium WebDriver

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== Preparing environment ==

Download and install Oracle Java:
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Download and install Visual Studio Community 2013:
http://www.visualstudio.com/downloads/download-visual-studio-vs

Download NUnit:
http://nunit.org/?p=download

Run NUnit-2.6.4.msi or install it later from Package Manager.

Run Visual Studio, select Development Settings: Visual C# and Light color theme. Create a new Project:
Templates > Visual C# > Class Library
Name: SeleniumTests

Download and install NuGet Package Manager. Go to:
Tools > Extensions and Updates

Restart Visual Studio.

Open Package Manager Console.
NuGet Package Manager > Package Manager Console

Install required Selenium packages:
Install-Package Selenium.WebDriver
Install-Package Selenium.Support
Install-Package NUnit -Version 2.6.4
Install-Package NUnitTestAdapter

Now in Solution Explorer we should have References to WebDriver and WebDriver.Support libraries.

Install NUnit Test Adapter
Tools > Extensions and Updates > Online > Visual Studio Gallery > NUnit Test Adapter

Install Firefox and Selenium add-on.

== Prepare and run a test ==

Record a test with Selenium IDE and export it:
File > Export Test Case As > C# / NUnit / WebDriver

Name it like this:
Wallet.cs

Load exported file in Visual Studio.
Project > Add existing Item

Alternatively, you can drag and drop file on to project name in Solution Explorer.

Run Test.
Test > Windows > Test Explorer

Use shortcut ctrl + r and then press a to run all tests.

Yo can open Output window:
View > Output

== Data sets in Selenium WebDriver ==

Prepare TestCase with two parameters like user and password:

<pre>
[TestCase("demo", "demo")]
[TestCase("test", "demo")]
public void TheWalletTest(string user, string password)
{
driver.Navigate().GoToUrl(baseURL + "/wallet/");
driver.FindElement(By.Name("user")).Clear();
driver.FindElement(By.Name("user")).SendKeys(user);
driver.FindElement(By.Name("password")).Clear();
driver.FindElement(By.Name("password")).SendKeys(password);
driver.FindElement(By.Id("log-in")).Click();
Assert.IsTrue(IsElementPresent(By.Id("log-out")));
driver.FindElement(By.Id("log-out")).Click();
}
</pre>

Annotations:
[TestFixture] - This marks a class that contains tests and, optionally, setup or teardown methods
[SetUp] - Is used to provide a set of functions that are performed just before each test method is called
[Test] - This marks a method inside a TestFixture class as a test
[TestCase] - This serves the dual purpose of marking a method with parameters as a test method and providing inline data to be used when invoking that method
[TearDown] - Is used to provide a set of functions that are performed after each test method is run

== Run tests on multiple browsers ==

Change driver from:
driver = new FirefoxDriver();

to:
driver = new ChromeDriver();

Download Chrome Driver:
http://chromedriver.storage.googleapis.com/2.12/chromedriver_win32.zip

Specify path to Chrome Driver executable file:
driver = new ChromeDriver(@"C:\Selenium");

Chrome Driver can be also installed using Package Manager Console:
Install-Package WebDriver.ChromeDriver.win32
Install-Package WebDriver.IEDriverServer.win32

Run tests.

== Getting Internet Explorer to work ==

Change security settings for Internet Explorer. Go to:
Internet Options > Security

Enable Protected Mode for all zones.

Depending on situation, in Trusted sites zone click on Sites, add Web application server address e.g. http://192.168.0.108 and uncheck Require server verification box.

== Parameters in Selenium WebDriver ==

Prepare TestFixture with browser names as parameters.

Create default constructor for TestFixture class.

Create if statement to assign different drivers.

<pre>
namespace SeleniumTests
{
[TestFixture("firefox")]
[TestFixture("chrome")]
[TestFixture("internet explorer")]
public class Wallet
{
private IWebDriver driver;
private StringBuilder verificationErrors;
private string baseURL;
private bool acceptNextAlert = true;
private string browser;

public Wallet(string browser)
{
this.browser = browser;
}

[SetUp]
public void SetupTest()
{
if (browser == "chrome")
{
driver = new ChromeDriver();
}
else if (browser == "internet explorer")
{
driver = new InternetExplorerDriver();
}
else
{
driver = new FirefoxDriver();
}

baseURL = "http://192.168.0.108";
verificationErrors = new StringBuilder();
}
</pre>

Other option is to create a switch statement:

<pre>
switch (browser)
{
case "chrome":
driver = new ChromeDriver();
break;
case "internet explorer":
driver = new InternetExplorerDriver();
break;
default:
driver = new FirefoxDriver();
break;
}
</pre>

== Remote WebDriver ==

Download Selenium Server Standalone and run it from command line. Configure all necessary drivers:
java -jar selenium-server-standalone-2.44.0.jar -Dwebdriver.chrome.driver=chromedriver.exe -Dwebdriver.ie.driver=IEDriverServer.exe

Change the code:
<pre>
DesiredCapabilities capabilities = new DesiredCapabilities();

switch (browser)
{
case "chrome":
capabilities = DesiredCapabilities.Chrome();
break;
case "internet explorer":
capabilities = DesiredCapabilities.InternetExplorer();
break;
default:
capabilities = DesiredCapabilities.Firefox();
break;
}

capabilities.SetCapability(CapabilityType.BrowserName, browser);
capabilities.SetCapability(CapabilityType.Platform, os);

driver = new RemoteWebDriver(new Uri("http://localhost:4444/wd/hub"), capabilities);
</pre>

Add second parameter to TestFixture :

[TestFixture("firefox", "WINDOWS")]
[TestFixture("chrome", "WINDOWS")]
[TestFixture("internet explorer", "WINDOWS")]

Add missing variables:

<pre>
private string browser;
private string os;

public Wallet(string browser, string os)
{
this.browser = browser;
this.os = os;
}
</pre>

Run all tests again.

== Selenium Grid ==

Start Selenium Server as a Hub:
java -jar selenium-server-standalone-2.44.0.jar -role hub

The console is available at:
http://localhost:4444/grid/console

Prepare configuration file for Node.

Register the Node with network address e.g. 192.168.0.50 to Selenium Hub with specific network address e.g. 192.168.0.10:
java -jar selenium-server-standalone-2.44.0.jar -role node -nodeConfig Windows_7.json -Dwebdriver.chrome.driver=chromedriver.exe -Dwebdriver.ie.driver=IEDriverServer.exe

Change the code:
<pre>
[TestFixture("firefox", "WINDOWS")]
[TestFixture("chrome", "WINDOWS")]
[TestFixture("internet explorer", "WINDOWS")]
[TestFixture("firefox", "LINUX")]
[TestFixture("chrome", "LINUX")]
public class Wallet
{
private IWebDriver driver;
private StringBuilder verificationErrors;
private string baseURL;
private bool acceptNextAlert = true;

private string browser;
private string os;

public Wallet(string browser, string os)
{
this.browser = browser;
this.os = os;
}

[SetUp]
</pre>

Run all tests again.

== Debugging ==

You can debug your tests:
System.Console.WriteLine("Page title is: " + driver.Title);
System.Console.WriteLine("Page address is: " + driver.Url);

[[Category:Selenium]]

Selenium WebDriver in C-Sharp - Revision history

Łukasz Walec: /* Parameters in Selenium WebDriver */