java.lang.NullPointerException when running testcase via Selenium

Question

I am facing an issue with NullPointerException. I tried as much as possible but I\'m unable to resolve this. I am implementing a POM model(Selenium) for my project.

Answer 1

You need to initialize your WebDriver first. As I seeing you are creating the reference of WebDriver but not initialized, try as below :-

WebDriver driver = new ChromeDriver(); //or other driver which you want

Note :- If you want to initialize ChromeDriver you need to download chromedriver and set system property before initialize driver as :-

System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");

So details answer like as below :-

public class VendorsHomePageTest 

{
    public WebDriver driver;
    @Test
    public void verifyVendorsHomePageTest() throws Exception
    {
        System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");
        driver = new ChromeDriver(); //or other driver which you want

        LoginIntoVendors login=PageFactory.initElements(driver, LoginIntoVendors.class);

        login.verifyLoginVendors();

        VendorsHomePageApp vhpapp= PageFactory.initElements(driver, VendorsHomePageApp.class);

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

        Thread.sleep(3000);

        vhpapp.clickOnNotificationsTab();

        vhpapp.clickOnProfileTab();

        vhpapp.clickOnTendersTab();

        vhpapp.clickOnDashboardTab();

        vhpapp.clickOnFirstTender();

    }

}

Edited :- You need to create separate class which gives you WebDriver instance as below :-

public class DriverInit {

    public WebDriver driver;
    private static DriverInit driverInit = null;

    public static DriverInit getInstance() {
        if (driverInit == null) {
            driverInit = new DriverInit();
        }
        return driverInit;
    }

    private DriverInit() {
        this.driver = new FirefoxDriver();
        this.driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        this.driver.get("******");
    }

    public WebDriver getDriver() {
        return this.driver;
    }

now you can call it into LoginIntoVendors as below :-

public class LoginIntoVendors 
{
    @Test
       public void verifyLoginVendors() throws Exception
       {
           WebDriver driver = DriverInit.getInstance().getDriver();

           IntiationPage vendorInit=PageFactory.initElements(driver, IntiationPage.class);

           vendorInit.clickOnLoginButton();

           VendorsLoginAction Loginven=PageFactory.initElements(driver, VendorsLoginAction.class);

           Loginven.vendorlogin("***","***@gmail.com", "****");

           String title = driver.getTitle();
           System.out.println("Title is  :" + title  );


       }
}

and in the VendorsHomePageTest as below :-

public class VendorsHomePageTest 

{
    public WebDriver driver;
    @Test
    public void verifyVendorsHomePageTest() throws Exception
    {

        driver = DriverInit.getInstance().getDriver();

        LoginIntoVendors login=PageFactory.initElements(driver, LoginIntoVendors.class);

        login.verifyLoginVendors();

        VendorsHomePageApp vhpapp= PageFactory.initElements(driver, VendorsHomePageApp.class);

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

        Thread.sleep(3000);

        vhpapp.clickOnNotificationsTab();

        vhpapp.clickOnProfileTab();

        vhpapp.clickOnTendersTab();

        vhpapp.clickOnDashboardTab();

        vhpapp.clickOnFirstTender();

    }

}

Hope it helps..:)