Null Pointer Exception Error While Execute Selenium Test Case

Question

I'm Beginner For Selenium Java Programming. When I'm Executing Below Script With TestNG I Face An Error.

Error Message

"java.lang.NullPointerException: Cannot invoke "org.openqa.selenium.WebDriver.findElement(org.openqa.selenium.By)" because "this.driver" is null"

Please Check Below Code And Suggest Changes.

import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import org.openqa.selenium.*;
import org.openqa.selenium.By;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.BeforeTest;

public class RegForm {
        
    public WebDriver driver; 
    
    @BeforeTest
    public static void main(String[] args) throws Exception {
        System.setProperty("webdriver.chrome.driver", "D://Selenium//ChromeDriver//chromedriver");
        WebDriver driver = new ChromeDriver();
        driver.get("http://automationpractice.com/index.php");
        driver.manage().window().maximize();
        Thread.sleep(3000);
    }
        
    @Test
    public void TC01() throws Exception {
        driver.findElement(By.xpath("//*[@id=\"header\"]/div[2]/div/div/nav/div[1]/a")).click();
        Thread.sleep(3000);
        
    }

}

I guess you should mention D://Selenium//ChromeDriver//chromedriver.exe — Nandan A
– Nandan A, Commented Aug 14, 2021 at 16:26

YaDav MaNish · Accepted Answer · 2021-08-14 16:51:15Z

1

Just remove the WebDriver from the main try as below

public static WebDriver driver; 
@BeforeTest
public static void main(String[] args) throws Exception {
    System.setProperty("webdriver.chrome.driver", "D://Selenium//ChromeDriver//chromedriver");
    driver = new ChromeDriver();
    driver.get("http://automationpractice.com/index.php");
    driver.manage().window().maximize();
    Thread.sleep(3000);
}

If you are not using MAC then try to provide the chromedriver extension .exe, Also check the import for the @Test as you mentioned you are using testng

edited Aug 14, 2021 at 16:51

answered Aug 14, 2021 at 16:44

YaDav MaNish

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Comments

shatulsky · Accepted Answer · 2021-08-22 23:57:45Z

0

Creating a driver in a test class is not the best idea.

It may be a good idea to implement something similar to this

answered Aug 22, 2021 at 23:57

shatulsky

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Comments

sagarp · Accepted Answer · 2021-09-05 10:22:08Z

0

Had the same issue wasted 1 full day in it. Please check if you have defined web driver in any other class or not. if yes then make it protected and extent it with this class.

protected static WebDriver driver;

answered Sep 5, 2021 at 10:22

sagarp

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