TestNG DataProviders

When you need to pass complex parameters or parameters that need to be created from Java (complex objects, objects read from a property file or a database, etc…), in such cases parameters can be passed using Dataproviders. A Data Provider is a method annotated with @DataProvider. A Data Provider returns an array of objects.

Let us check out the Login example using Dataproviders.

Steps to follow:

1)  Define the method credentials() which is defined as a DataProvider using the annotation. This method returns array of object array.

2) Add a method testLogin() to your DataProviderTest class. This method takes two strings as input parameters.

3) Add the annotation @Test(dataProvider = “Authentication”) to this method. The attribute dataProvider is mapped to “Authentication”.

Test will look like this:

package automationFramework;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.firefox.FirefoxDriver;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

public class DataProviderTest {

            private static WebDriver driver;

           

  @DataProvider(name = "Authentication")

  public static Object[][] credentials() {

        return new Object[][] { { "testuser_1", "Test@123" }, { "testuser_2", "Test@111" }};

  }

 

  // Here we are calling the Data Provider object with its Name

  @Test(dataProvider = "Authentication")

  public void testLogin(String sUsername, String sPassword) {

              driver = new FirefoxDriver();

      driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

      driver.get("http://www.gmail.com");

      driver.findElement(By.id("txtUsername")).sendKeys(sUsername);

      driver.findElement(By.id("txtPassword")).sendKeys(sPassword);

      driver.findElement(By.id("btnLogin")).click();

      driver.findElement(By.xpath(".//*[@id='account_logout']/a")).click();

      driver.quit();

  }

}

Run the test by right click on the test case script and select Run As > TestNG Test. Give it few minutes to complete the execution and as the test data is provided two times, the above test will be executed two times completely.