First of all, we will try and deal with our session problem.

WebDriver has a command that will allow you to clear out your cookies, so we will trigger this after every test. We will then add a new @AfterSuite annotation to close the browser once all of the tests have nished.

   package com.masteringselenium;

   import org.openqa.selenium.WebDriver;
   import org.testng.annotations.AfterMethod;
   import org.testng.annotations.AfterSuite;
   import org.testng.annotations.BeforeSuite;

   import java.util.ArrayList;
   import java.util.Collections;
   import java.util.List;
   public class DriverFactory {

       private static List<WebDriverThread> webDriverThreadPool =
       Collections.synchronizedList(new
       ArrayList<WebDriverThread>());
       private static ThreadLocal<WebDriverThread> driverThread;

       @BeforeSuite
       public static void instantiateDriverObject() {

           driverThread = new ThreadLocal<WebDriverThread>() {
               @Override

               protected WebDriverThread initialValue() {
                   WebDriverThread webDriverThread = new
                   WebDriverThread();
                   webDriverThreadPool.add(webDriverThread);
                   return webDriverThread;

} };

}

       public static WebDriver getDriver() throws Exception {
           return driverThread.get().getDriver();

}

       @AfterMethod
       public static void clearCookies() throws Exception {

getDriver().manage().deleteAllCookies();

       @AfterSuite
       public static void closeDriverObjects() {

           for (WebDriverThread webDriverThread :
           webDriverThreadPool) {

               webDriverThread.quitDriver();
           }