I'm developing tests with Selenium webdriver in C #, for each test class the browser is initialized and after running all the tests of this class the browser is closed. How do I initialize only once and close only after running all tests of all classes?
I created a "SeleniumBase" class for the [TestFixtureSetUp] and [TestFixtureTearDown] methods
The best way I found was to implement the Singleton pattern for the IWebDriver object.
Ex:
Base class:
public class Base
{
public readonly IWebDriver driverIe;
public Base()
{
driverIe = SingletonWebDriver.GetInstance().GetDriver();
}
...
Singleton WebDriver class:
public class SingletonWebDriver
{
private string IEServerselenium = ConfigurationManager.AppSettings["IEDriverServer"].ToString();
private IWebDriver _driver;
private static SingletonWebDriver _uniqueInstance;
/// <summary>
/// Construtor receberá qualquer classe que implemente IWebDriver conforme fala a assinatura da classe
/// </summary>
/// <param name="type">Qual quer classe que implemente a interface IWebDriver</param>
public SingletonWebDriver()
{
_driver = GetWebDriver();
}
/// <summary>
/// Retorna uma nova instancia de WebDriver de acordo com o tipo
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private IWebDriver GetWebDriver()
{
return new InternetExplorerDriver(IEServerselenium);
}
/// <summary>
/// Retorna o WebDriver
/// </summary>
/// <returns></returns>
public IWebDriver GetDriver()
{
return _driver;
}
public static SingletonWebDriver GetInstance()
{
if (_uniqueInstance == null)
{
_uniqueInstance = new SingletonWebDriver();
}
return _uniqueInstance;
}
}
The class above will solve your problem. Prorem I had the need to implement for other Webdrives. So I've implemented a solution with generics.
/// <summary>
/// Classe responsável por impedir que existam várias instancias de WebDriver,
/// o tipo T apenas pode ser uma classe que implementa IWebDriver
/// </summary>
/// <typeparam name="T"></typeparam>
public class SingletonWebDriver<T> where T : IWebDriver
{
/// <summary>
/// Pega o caminho do executável para criar o web driver do IE
/// </summary>
private string IEServerselenium = ConfigurationManager.AppSettings["IEDriverServer"].ToString();
private IWebDriver _driver;
/// <summary>
/// Atributo estatico onde terá a unica intancia do web driver
/// </summary>
private static SingletonWebDriver<T> _uniqueInstance;
/// <summary>
/// Construtor receberá qualquer classe que implemente IWebDriver conforme fala a assinatura da classe
/// </summary>
/// <param name="type">Qual quer classe que implemente a interface IWebDriver</param>
public SingletonWebDriver()
{
_driver = GetWebDriver();
}
/// <summary>
/// Retorna uma nova instancia de WebDriver de acordo com o tipo
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private IWebDriver GetWebDriver()
{
if(typeof(T) == typeof(InternetExplorerDriver))
{
return new InternetExplorerDriver(IEServerselenium);
}
else if (typeof(T) == typeof(FirefoxDriver))
{
return new FirefoxDriver();
}
else if (typeof(T) == typeof(OperaDriver))
{
return new OperaDriver();
}
return null;
}
/// <summary>
/// Retorna o WebDriver
/// </summary>
/// <returns></returns>
public IWebDriver GetDriver()
{
return _driver;
}
/// <summary>
/// Retorna a unica instancia de SingletonWebDriver caso ainda não tenha sido instanciado
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static SingletonWebDriver<T> GetInstance()
{
if (_uniqueInstance == null)
{
_uniqueInstance = new SingletonWebDriver<T>();
}
return _uniqueInstance;
}
}