selenium - Null pointer exception when using extent report -

i have 2 classes baseclass , tescaseloginpage. when trying execute tescaseloginpage class without report/logger (extentreport),test case getting pass. when puttin extend report code, getting nullpointerexception .could please me

i have written report.endtest(logger); in line no 51. tried comment line , executed. time got same error in line no 50 i.e.

logger.log(logstatus.info,"browser closed");. every time commenting error line, getting same error in new log related line only.

error log below :

url : http://store.demoqa.com//products-page//your-account// failed configuration: @afterclass close java.lang.nullpointerexception @ testcases.testcaseloginpage.close(testcaseloginpage.java:51) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl(nativemethodaccessorimpl.java:62)

sun.reflect.delegatingmethodaccessorimpl.(delegatingmethodaccessorimpl. java:43) @ java.lang.reflect.method.invoke(method.java:498) @ org.testng.internal.methodinvocationhelper.(methodinvocationhelper.java:104)

at org.testng.internal.invoker.invokeconfigurationmethod(invoker.java:515) @ org.testng.internal.invoker.invokeconfigurations(invoker.java:217) @ org.testng.internal.invoker.invokeconfigurations(invoker.java:144) @ org.testng.internal.invokeafterclassmethods(testmethodworker.java:217) @ org.testng.internal.testmethodworker.run(testmethodworker.java:115) @ org.testng.testrunner.privaterun(testrunner.java:756) @ org.testng.testrunner.run(testrunner.java:610) @ org.testng.suiterunner.runtest(suiterunner.java:387) @ org.testng.suiterunner.runsequentially(suiterunner.java:382) @ org.testng.suiterunner.privaterun(suiterunner.java:340) @ org.testng.suiterunner.run(suiterunner.java:289) @ org.testng.suiterunnerworker.runsuite(suiterunnerworker.java:52) @ org.testng.suiterunnerworker.run(suiterunnerworker.java:86) @ org.testng.testng.runsuitessequentially(testng.java:1293) @ org.testng.testng.runsuiteslocally(testng.java:1218) @ org.testng.testng.runsuites(testng.java:1133) @ org.testng.testng.run(testng.java:1104) @ org.testng.remote.abstractremotetestng.run(abstractremotetestng.java:132) @ org.testng.remote.remotetestng.initandrun(remotetestng.java:236) @ org.testng.remote.remotetestng.main(remotetestng.java:81) failed: login java.lang.nullpointerexception @ testcases.testcaseloginpage.login(testcaseloginpage.java:35) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62)

here code :

baseclass.java

package testcases; import org.openqa.selenium.by; import org.openqa.selenium.webdriver; import org.openqa.selenium.support.pagefactory; import org.openqa.selenium.support.ui.expectedconditions; import org.openqa.selenium.support.ui.webdriverwait; import com.relevantcodes.extentreports.extentreports; import com.relevantcodes.extentreports.extenttest; import com.relevantcodes.extentreports.logstatus; import factory.browserfactory; import factory.dataproviderfactory; import pages.loginpage;  public class baseclass  {      webdriver driver;     extentreports report;     extenttest logger;     string logintext;      public void setup()     {         driver=browserfactory.getbrowser("chrome");         driver.get(dataproviderfactory.getconfig().getapplicationurl());     }      public void loginintoapplication()     {                loginpage login=pagefactory.initelements(driver, loginpage.class);         login.login(dataproviderfactory.getexcel().getdata(0, 0, 0),          dataproviderfactory.getexcel().getdata(0, 0, 1));     }      public string loginverification()     {         try {             thread.sleep(5000);         } catch (exception e) {         system.out.println(e.getmessage());         }         //webdriverwait wait=new webdriverwait(driver, 20);         //wait.until(expectedconditions.visibilityofelementlocated(by.xpath("//li[@id='wp-admin-bar-my-account']/a")));          logintext=driver.findelement(by.xpath("//li[@id='wp-admin-bar-my-account']/a")).gettext();         logger.log(logstatus.info, "logiin account text has been captured successfully");         return logintext;     }      public void teardown()     {         driver.quit();     } } 

testcaseloginpage.java

package testcases; import org.openqa.selenium.by; import org.openqa.selenium.support.ui.expectedconditions; import org.openqa.selenium.support.ui.webdriverwait; import org.testng.assert; import org.testng.annotations.aftertest; import org.testng.annotations.beforetest; import org.testng.annotations.test;  import com.relevantcodes.extentreports.logstatus; import pages.loginpage;   public class testcaseloginpage extends baseclass {      //webdriver driver;     //baseclass base=pagefactory.initelements(driver, baseclass.class);      @beforetest     public void initial()     {         base.setup();     }      @test(priority=1)     public void login()     {          base.loginintoapplication();         try {             thread.sleep(5000);         } catch (exception e) {             system.out.println(e.getmessage());         }         //webdriverwait wait=new webdriverwait(driver, 20);         //wait.until(expectedconditions.visibilityofelementlocated(by.xpath("//a[contains(.,'howdy')]")));         logger.log(logstatus.info, "logiin applicaion successfully");         //loginpage login=pagefactory.initelements(driver, loginpage.class);          loginpage login=new loginpage(driver);         base.loginverification();         system.out.println("login text : "+base.logintext);          assert.assertequals(base.logintext, login.exp,"unable verify login verification");            logger.log(logstatus.pass, "verified login account expected user successfully");      }      @aftertest     public void close()     {         base.teardown();         logger.log(logstatus.info, "browser closed");         report.endtest(logger);         report.flush();     } } 

initialize logger in test.

use line:

logger = extent.createtest("test name","description"); 

make first line before call logger in test.

for reference see software automata - extent reports in selenium