when i am using pojo, i am getting exception? - selenium

Question

hi all please check my code
public class Sample1 extends Sample {
public static void main(String[] args) {
System.setProperty("webdriver.chrome.driver",
"C:\\Users\\Balaji-PC\\cucumber\\SamplePro\\driver\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("https://www.facebook.com/");
driver.manage().window().maximize();
Sample s= new Sample1();
WebElement d = s.getUsername();
d.sendKeys("lsmanikandan");
s.getPassword().sendKeys("manikandan");
}
}
Please check below my pojo class
public class Sample {
WebDriver driver;
public Sample() {
PageFactory.initElements(driver, this);
}
#FindBy(id = "email")
private WebElement username;
#FindBy(id = "pass")
private WebElement password;
public WebElement getUsername() {
return username;
}
public WebElement getPassword() {
return password;
}
}
please find below the exception
Exception in thread "main" java.lang.NullPointerException at
org.openqa.selenium.support.pagefactory.DefaultElementLocator.findElement(DefaultElementLocator.java:69)
at
org.openqa.selenium.support.pagefactory.internal.LocatingElementHandler.invoke(LocatingElementHandler.java:38)
at com.sun.proxy.$Proxy4.sendKeys(Unknown Source) at
org.test.Sample1.main(Sample1.java:18)

Answer 1

The issue in your code is that you are not passing your driver state from child class Sample 1 to based class Sample.
The magic is in these three points
Adding parametrized constructor in Child class - Sample1
public Sample1(WebDriver driver) { super(driver); }
Adding parametrized constructor in Parent Class - Sample
public Sample(WebDriver driver) {
PageFactory.initElements(driver, this);
System.out.println("Page Factory started");
}
Creating object to called page factory in Parent class by passing driver.
Sample s = new Sample1(driver);
public class Sample {
WebDriver driver;
public Sample(WebDriver driver) {
PageFactory.initElements(driver, this);
System.out.println("Page Factory started");
}
#FindBy(id = "email")
private WebElement username;
#FindBy(id = "pass")
private WebElement password;
public WebElement getUsername() {
System.out.println(username.getAttribute("data-testid"));
return username;
}
public WebElement getPassword() {
System.out.println(username.getAttribute("data-testid"));
return password;
} }
public class Sample {
WebDriver driver;
public Sample(WebDriver driver) {
PageFactory.initElements(driver, this);
System.out.println("Page Factory started");
}
#FindBy(id = "email")
private WebElement username;
#FindBy(id = "pass")
private WebElement password;
public WebElement getUsername() {
System.out.println(username.getAttribute("data-testid"));
return username;
}
public WebElement getPassword() {
System.out.println(username.getAttribute("data-testid"));
return password;
} }