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selenium-webdriverautomationtestngtestng-eclipse

RemoteTestNG.java : 76 error while running TestNG test set

Below is the code which I am trying to run. As I run the below code, the website of Mercury tour opens and the execution stops there throwing a list of errors that are mentioned below after this code. I tried uninstalling and re-installing TestNG framework but in vain.This is the pop-up I get when I click on RemoteTestNG.java:76 error message from the console.

package testNG1;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class MercuryTours 
{
    public WebDriver driver;
    public WebDriverWait wait;

    @BeforeClass
    public void openBrowser()
    {
        System.setProperty("webdriver.gecko.driver", "C:\\\\Users\\Diganta\\Desktop\\Workspace\\Library\\geckodriver.exe");
        WebDriver driver=new FirefoxDriver();
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        wait = new WebDriverWait(driver, 10);

        driver.get("http://newtours.demoaut.com/");
    }

    @AfterMethod
    public void goBackToHomePage()
    {
        driver.findElement(By.linkText("Home")).click();
        wait.until(ExpectedConditions.titleContains("Welcome"));
    }

    @Test(priority=1)
    public void verifySigninPage()
    {
        driver.findElement(By.linkText("SIGN-ON")).click();
        wait.until(ExpectedConditions.titleContains("Sign-on"));
        String actual = driver.getTitle();
        String expected = "Sign-on: Mercury Tours";
        Assert.assertEquals(actual, expected);
    }

    @Test(priority=2)
    public void verifyRegisterPage()
    {
        driver.findElement(By.linkText("REGISTER")).click();
        wait.until(ExpectedConditions.titleContains("Register"));
        String actual = driver.getTitle();
        String expected = "Register: Mercury Tours";
        Assert.assertEquals(actual, expected);
    }

    @Test(priority=3)
    public void verifySupportPage(){
        driver.findElement(By.linkText("SUPPORT")).click();
        wait.until(ExpectedConditions.titleContains("Support"));
        String actual = driver.getTitle();
        String expected = "Support: Mercury Tours";
        Assert.assertEquals(actual, expected);
    }

    @Test(priority=4)
    public void verifyContactPage()
    {
        driver.findElement(By.linkText("CONTACT")).click();
        wait.until(ExpectedConditions.titleContains("Contact"));
        String actual = driver.getTitle();
        String expected = "Contact: Mercury Tours";
        Assert.assertEquals(actual, expected);
    }

    @AfterClass
    public void closeBrowser()
    {
        driver.close();
    }

}

I am getting the below error in the Eclipse output console

FAILED CONFIGURATION: @AfterMethod goBackToHomePage
java.lang.NullPointerException
    at testNG1.MercuryTours.goBackToHomePage(MercuryTours.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:523)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:224)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:723)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

SKIPPED CONFIGURATION: @AfterClass closeBrowser
FAILED: verifySigninPage
java.lang.NullPointerException
    at testNG1.MercuryTours.verifySigninPage(MercuryTours.java:43)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:661)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

SKIPPED: verifyRegisterPage
java.lang.NullPointerException
    at testNG1.MercuryTours.goBackToHomePage(MercuryTours.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:523)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:224)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:723)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

SKIPPED: verifySupportPage
java.lang.NullPointerException
    at testNG1.MercuryTours.goBackToHomePage(MercuryTours.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:523)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:224)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:723)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

SKIPPED: verifyContactPage
java.lang.NullPointerException
    at testNG1.MercuryTours.goBackToHomePage(MercuryTours.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:523)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:224)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:723)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:744)
    at org.testng.TestRunner.run(TestRunner.java:602)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    at org.testng.TestNG.runSuites(TestNG.java:1144)
    at org.testng.TestNG.run(TestNG.java:1115)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)


===============================================
    Default test
    Tests run: 4, Failures: 1, Skips: 3
    Configuration Failures: 1, Skips: 1
===============================================


===============================================
Default suite
Total tests run: 4, Failures: 1, Skips: 3
Configuration Failures: 1, Skips: 1
===============================================
Solution

  • The error @AfterMethod goBackToHomePage and java.lang.NullPointerException says it all.

    You have declared an instance of WebDriver as in public WebDriver driver; as a global variable within the Class scope.

    Moving forward in openBrowser() method under @BeforeClass annotation you have initiated another instance of WebDriver as in WebDriver driver=new FirefoxDriver();.

    So, once the execution comes out of executing the very first method, goBackToHomePage() method within @AfterMethod annotation is called where the dangling driver instance comes into play and causes you a java.lang.NullPointerException.

    Solution:

    Here the immediate solution will be to use a single instance of WebDriver across your program which you have declared globally at the Class level and change WebDriver driver=new FirefoxDriver(); to driver=new FirefoxDriver();