Method under #test not works, untill placed with the url - browser-automation

Question

#Test method is not working, but works when placed after flipkart url section.
i think that if i place the click function with url then it will be a wrong approach, code should be independent.
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
public class Testdemo {
WebDriver driver;
#BeforeTest
public void test2() throws InterruptedException {
System.setProperty("webdriver.chrome.driver","\\driver\\chromedriver.exe");
WebDriver driver=new ChromeDriver();
driver.manage().window().maximize();
driver.get("https://www.flipkart.com/");
}
#Test
public void test3() throws InterruptedException {
Thread.sleep(2000);
driver.findElement(By.className("_29YdH8")).click();
}
}
java.lang.NullPointerException
at Test.Flipkart.data(Flipkart.java:40)

Answer 1

Problem is that even though you defined a class level variable for driver as below
public class Testdemo {
WebDriver driver;
You never initiated , because in #BeforeTest you defined it as a local variable again
So it throws null point excepption for the driver, To solve this please remove webdriver , so the class level variable will be used
**WebDriver** driver=new ChromeDriver();
Corrected code
#BeforeTest
public void test2() throws InterruptedException {
System.setProperty("webdriver.chrome.driver","\\driver\\chromedriver.exe");
driver=new ChromeDriver();