Exaplain about '@DataProvider'?

Exaplain about '@DataProvider'?

Ans: A DataProvider is data feeder method defined in your class that supplies a test method with data .

The annotated method must return an Object[][] where each Object[] can be assigned the parameter list of the test method.

Example Script:

@DataProvider(name = "DP1")

    public Object[][] createData() {

        Object[][] retObjArr={{"001","Jack","London"},

                            {"002","John","New York"},

                            {"003","Mary","Miami"},

{"004","George","california"}};

        return(retObjArr);

    }

@Test (dataProvider = "DP1")

    public void testEmployeeData(String empid, String empName, String city){

selenium.type("id", empid);

selenium.type("name", empName);

selenium.click("submit_button");

selenium.waitForPageToLoad("30000");

assertTrue(selenium.isTextPresent(city));

}

++++++++Sample code using @DataProvider+++++


import java.net.URL;
import java.util.concurrent.TimeUnit;
import org.junit.Assert;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

public class Data_Provider {

  private WebDriver driver;
 private String baseUrl;
 // String baseUrl, nodeUrl;

  @DataProvider(name = "myTest")
  public Object[][] createData1() {
          return new Object[][] {
            { "India"},
            { "Brazil"},
            { "Canada"},
            { "Sri Lanka"},
            { "England"},
            { "UK"},
            { "United States"},          
          };
  }

  @BeforeMethod
  public void setUp() throws Exception {
    driver = new FirefoxDriver();
    baseUrl = "http://www.wikipedia.org/";
    driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
  }

  @Test(dataProvider = "myTest")
  public void testSearchCountry(String country) throws Exception {
   
    driver.get(baseUrl + "/wiki/Main_Page");
    driver.findElement(By.id("searchInput")).clear();
    driver.findElement(By.id("searchInput")).sendKeys(country);
    driver.findElement(By.id("searchButton")).click();
    String str = driver.findElement(By.cssSelector("span")).getText();
    Assert.assertTrue(country.equals(str.trim()));
    System.out.println(str);
  }

  @AfterMethod
  public void tearDown() throws Exception {
    driver.quit();  
  }
}