Объект, созданный ExtentTest в другом классе, дает исключение Null Pointer

Question

Пожалуйста, помогите решить указанную ниже проблему.

Объект создан ExtentTest в другом классе. При запуске файла XML - код выдаёт ошибку исключения Null Pointer для строки er.logger = er.extent.createTest ("Test1"); ..................... в приведенном ниже тестовом примере Класс

Невозможно понять, как решить проблему.

Пожалуйста, помогите

Below is the Extent Report Listener Class

package UtilsClasses;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.io.FileUtils;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.TakesScreenshot;
import org.testng.ITestContext;
import org.testng.ITestResult;
import org.testng.TestListenerAdapter;

import com.aventstack.extentreports.ExtentReports;
import com.aventstack.extentreports.ExtentTest;
import com.aventstack.extentreports.Status;
import com.aventstack.extentreports.markuputils.ExtentColor;
import com.aventstack.extentreports.markuputils.MarkupHelper;
import com.aventstack.extentreports.reporter.ExtentHtmlReporter;
import com.aventstack.extentreports.reporter.configuration.ChartLocation;
import com.aventstack.extentreports.reporter.configuration.Theme;

import BaseandTestClasses.BaseConnection;

public class ExtentReport extends TestListenerAdapter
{
    public ExtentHtmlReporter htmlReporter;
    public ExtentReports extent;
    public ExtentTest logger;
    
    public void onTestSkipped(ITestResult tr) //@TestMethodSkipped
    {
        logger=extent.createTest(tr.getName());
        logger.log(Status.SKIP, MarkupHelper.createLabel(tr.getName(), ExtentColor.ORANGE));
    }
    
    public void onFinish (ITestContext testContext) //onFinish is Test tag finish in XML
    {
        extent.flush();
    }

    public void onStart(ITestContext testContext) //Test tag start in XML
    {
        String timeStamp= new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss").format(new Date());
        String repName="Test-Report-"+timeStamp+".html";
        htmlReporter=new ExtentHtmlReporter(System.getProperty("user.dir")+ "/test-output/"+repName);
        htmlReporter.loadXMLConfig(System.getProperty("user.dir")+ "/extent-config.xml");
        
        extent= new ExtentReports();
    
        extent.attachReporter(htmlReporter);
        extent.setSystemInfo("Host name","localhost");
        extent.setSystemInfo("Environment","QA");
        extent.setSystemInfo("user","kedar");
    

        htmlReporter.config().setDocumentTitle("Gtpl Bank");
        htmlReporter.config().setReportName("Automation Test Report");
        htmlReporter.config().setTestViewChartLocation(ChartLocation.TOP);
        htmlReporter.config().setTheme(Theme.DARK); 
    }

    public void onTestFailure(ITestResult tr) //@TestMethodFailed
    {
        logger=extent.createTest(tr.getName());
        logger.log(Status.FAIL, MarkupHelper.createLabel(tr.getName(), ExtentColor.RED));
        
        //Below is code for Screen-Capture to be done from here, with timestamp
        String timeStamp= new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss").format(new Date());
        
        TakesScreenshot ts = (TakesScreenshot) BaseConnection.driver;
        File source = ts.getScreenshotAs(OutputType.FILE);
        String screenshotPath = System.getProperty("user.dir")+"/00Screenshots/"+tr.getName()+" - "+timeStamp+".png";
        File target = new File(screenshotPath);
        try {
            FileUtils.copyFile(source, target);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        
        File f = new File(screenshotPath);
        
        if(f.exists())
        {
            try {
                logger.fail("screenshot is below: "+logger.addScreenCaptureFromPath(screenshotPath));
            }
            catch (IOException e)
            {
            e.printStackTrace();
            }
        }
    }

    public void onTestSuccess(ITestResult tr) //@TestMethodPassed
    {
        logger=extent.createTest(tr.getName());
        logger.log(Status.PASS, MarkupHelper.createLabel(tr.getName(), ExtentColor.GREEN));
    }

    public void onTestFailedButWithinSuccessPercentage(ITestResult arg0) {
        // TODO Auto-generated method stub
    }

    public void onTestStart(ITestResult tr) {
        // TODO Auto-generated method stub
    }
}

_________________________________________________________________________________________________________
Below is the Test Case Class

package BaseandTestClasses;

import java.io.IOException;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

import com.aventstack.extentreports.ExtentTest;
import com.aventstack.extentreports.Status;

import PageObjectClasses.PageObjectLoginLogout;
import UtilsClasses.ExtentReport;

public class TC1_LoginLogout1 extends BaseConnection
{   
    ExtentReport er = new ExtentReport ();
    
    @Test
    public void TC1LoginLogout1() throws IOException, InterruptedException
    {
        PageObjectLoginLogout pgll = new PageObjectLoginLogout(driver);
        
        er.logger=er.extent.createTest("Test1");
        System.out.println("In Start");
        System.out.println("Started Test");
        
        pgll.setUserName(UName);
        System.out.println("Entered valid UserName: "+UName);
        logj.info("Entered valid UserName: "+UName);
        er.logger.pass("Entered valid UserName: "+UName);
        
        pgll.setPassword(PWord);
        System.out.println("Entered valid Password: "+PWord);
        logj.info("Entered valid Password: "+PWord);
        er.logger.pass("Entered valid Password: "+PWord);
        
        pgll.clickSubmit();
        Thread.sleep(10000);
        
        if(driver.getTitle().contains("GTPL Bank Manager"))
        {
            Assert.assertTrue(true);
            System.out.println("Login successful. Test Case Passed");
            logj.info("Login successful. Test Case Passed");
            er.logger.pass("Login successful. Test Case Passed");
        }
        else
        {
            System.out.println("Login failed. Test Case Failed");
            logj.info("Login failed. Test Case Failed");
            er.logger.fail("Login successful. Test Case Passed");
            Assert.assertTrue(false);
        }
        
        er.logger.info("Test Case Completed");
    }
}

_________________________________________________________________________________________________________
Below is the XML File
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite">

   <listeners>
    <listener class-name="UtilsClasses.ExtentReport"/>
   </listeners>  
   
   <test name="ChromeTest">
   <parameter name="browser" value="chrome" />
      <classes>
         <class name="BaseandTestClasses.TC1_LoginLogout1" />
         <!--<class name="BaseandTestClasses.TC1_LoginLogout2" /> 
         <class name="BaseandTestClasses.TC2_AddCustomer" />--> 
      </classes>
   </test>
   

</suite>
_________________________________________________________________________________________________________