All about Selenium Automation: TestNG

One of the important features of TestNG is parameterization. This feature allows user to pass parameter values to test methods as arguments. This is supported by using the @Parametersannotation.

There are mainly two ways through which we can provide parameter values to test-methods: testng.xml or dataproviders.

Some times it may be required for us to pass values to test methods during run time. Like we can pass user name and password through testng.xml instead of hard coding it in testmethods. or we can pass browser name as parameter to execute in specific browser.

Let us now try to understand parameterization with a basic example.

	@Parameters({ "browser" })
	@Test
	public void testCaseOne(String browser) {
	System.out.println("browser passed as :- " + browser);
	}

	@Parameters({ "username", "password" })
	@Test
	public void testCaseTwo(String username, String password) {
	System.out.println("Parameter for User Name passed as :- " + username);
	System.out.println("Parameter for Password passed as :- " + password);
	}

view raw 1testngparameter1.java hosted with ❤ by GitHub

	<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
	<suite name="Parameterization Test Suite">
	<test name="Testing Parameterization">
	<parameter name="browser" value="Firefox"/>
	<parameter name="username" value="testuser"/>
	<parameter name="password" value="testpassword"/>
	<classes>
	<class name="com.parameterization.TestParameters" />
	</classes>
	</test>
	</suite>

view raw 2testngparam.xml hosted with ❤ by GitHub


	The below is the testng.xml file, in which we need to pass the parameter values for the test method



	<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
	<suite name="Parameterization Test Suite">
	<test name="Testing Parameterization">

	<parameter name="username" value="guest"/>
	<parameter name="password" value="password"/>
	<classes>
	<class name="com.testng.ParameterFromXML"/>
	</classes>
	</test>
	</suite>

view raw 3testng.xml hosted with ❤ by GitHub



	Create a class and read the username and password as parameters from XML and pass to testng file.


	import org.openqa.selenium.By;
	import org.openqa.selenium.WebDriver;
	import org.openqa.selenium.firefox.FirefoxDriver;
	import org.testng.annotations.BeforeTest;
	import org.testng.annotations.DataProvider;
	import org.testng.annotations.Parameters;
	import org.testng.annotations.Test;

	public class ParameterFromXML {

	WebDriver myTestDriver;

	@BeforeTest
	public void Init(){

	myTestDriver=new FirefoxDriver();
	}

	// will read from xml
	@Parameters({ "username", "password" })

	@Test
	public void testcaseonw(String username, String password) throws InterruptedException {


	myTestDriver.get("https://timetracker.anuko.com/login.php");

	myTestDriver.manage().window().maximize();
	Thread.sleep(5000);

	myTestDriver.findElement(By.xpath("//*[@id='login']")).sendKeys(username);

	myTestDriver.findElement(By.xpath("//*[@id='password']")).sendKeys(password);

	// myTestDriver.findElement(By.id("btn_login")).click();



	}


	}


	In the above class, for Test Method 'testCaseOne', we are passing two parameters 'username' and 'password'
	as input to test method.