PAGE OBJECT MODEL

Posted by: Kiran Thurimerla
 (SQA Module Lead working at Ebix Software India PVT Ltd).
Contact Author: kiran.thurimerla@gmail.com

Creating Selenium test cases can result in not maintainable project. One of the reasons is that too many duplicated code is used. Duplicated code could be caused by duplicated functionality and this will result in duplicated usage of locators. The disadvantage of duplicated code is that the project is less maintainable. If some locator will change, you have to walk through the whole test code to adjust locators where necessary. By using the page object model we can make non-brittle test code and reduce or eliminate duplicate test code. Beside of that it improves the readability and allows us to create interactive documentation. Last but not least, we can create tests with less keystroke. An implementation of the page object model can be achieved by separating the abstraction of the test object and the test scripts.

Example (General):

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.ie.InternetExplorerDriver;

 

public class SampleOne {

      

       public static void main(String a[]) throws InterruptedException {

 

              System.setProperty("webdriver.ie.driver",".\\IEDriverServer.exe");

             

              WebDriver driver = new InternetExplorerDriver();

             

              driver.get("http://obesityfoundationindia.com/bmi.htm");

             

              WebElement wt = driver.findElement(By.name("wg"));

              wt.sendKeys("68");

             

              WebElement kglbs = driver.findElement(By.name("opt1"));

              kglbs.sendKeys("kilograms");

             

              WebElement hft = driver.findElement(By.name("opt2"));

              hft.sendKeys("5'");

             

              WebElement hinc = driver.findElement(By.name("opt3"));

              hinc.sendKeys("9\"");

             

              WebElement cal = driver.findElement(By.name("cc"));

              cal.click();

             

              Thread.sleep(3000);

              driver.quit();

       }

 

}

 In the above code, the Web elements declarations are not reusable. If we want to build any other scenarios with the same elements we need to once again write all the objects declarations.

Using Page Object Model (POM), we can reuse the web elements declarations.  In POM, we will separate Web elements declarations from main selenium scripting file so that, the same web elements declarations will be reusable in other scripts.

It’s just like an Objects Repository.  For each web page we will write a separate object repository file which contains all the Web elements objects.

In the above given example, all the web elements are given in a single file.  But, as per POM, we will a separate objects repository file.

 

 

Example (POI): ( Screenshot1)

 

 

Main Scripting class: (Screenshot2)

 

 

 

 

Example (POI): (Code)

package pageObjects;

 

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

 

public class BMICalcHome {

 

       //wt, kglbs, hft, hinc, cal

      

       public static  WebElement wg(WebDriver driver) {

             

              WebElement wt = driver.findElement(By.name("wg"));

              return wt;

       }

      

       public static WebElement kglbs(WebDriver driver) {

             

              WebElement kglbs = driver.findElement(By.name("opt1"));

              return kglbs;

       }

      

       public static WebElement hft(WebDriver driver) {

             

              WebElement hft = driver.findElement(By.name("opt2"));

              return hft;

       }

      

       public static WebElement hinc(WebDriver driver) {

             

              WebElement hinc = driver.findElement(By.name("opt3"));

              return hinc;

       }

      

       public static WebElement cal(WebDriver driver) {

             

              WebElement cal = driver.findElement(By.name("cc"));

              return cal;

       }

}

 

Main Scripting class: (Code)

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.ie.InternetExplorerDriver;

 

import pageObjects.BMICalcHome;

import pageObjects.BMIMemberReg;

 

public class POM_Samp1 {

 

       public static void main(String[] args) throws InterruptedException {

              // TODO Auto-generated method stub

             

              System.setProperty("webdriver.ie.driver",".\\IEDriverServer.exe");

             

              WebDriver driver = new InternetExplorerDriver();

             

              driver.get("http://obesityfoundationindia.com/bmi.htm");

             

      

              //Home Page

             

              BMICalcHome.wg(driver).sendKeys("75");

              BMICalcHome.kglbs(driver).sendKeys("kilograms");

              BMICalcHome.hft(driver).sendKeys("5'");

              BMICalcHome.hinc(driver).sendKeys("9\"");

              BMICalcHome.cal(driver).click();

             

              Thread.sleep(3000);

              driver.quit();

 

       }

 

}