org.testng.TestNGException : Cannot instantiate class

Question

I am facing this 'Cannot insantiate class' error on running one of my test cases in selenium webdriver using java(Using Maven project).

Below is the parent class where I defined driver and properties

package com.pvi.qa.base;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class TestBase {

    public static WebDriver driver;
    public static Properties prop ;

    public TestBase() {
        try {
            prop = new Properties();
            FileInputStream ip = new FileInputStream(System.getProperty("C:\\Users\\RxLogix\\eclipse-workspace\\PviIntake\\src\\main\\java\\com\\pvi\\qa\\config\\config.properties"));
        prop.load(ip);

        }
        catch(FileNotFoundException e) {
            e.printStackTrace();
        }
        catch(IOException e) {
            e.printStackTrace();
        }
    }

public static void initialization () {
String BrowserName = prop.getProperty("browser");   
if(BrowserName.equals("chrome")) {
    System.setProperty("webdriver.chrome.driver", "D:\\Softwares\\chromedriver_win32 (1)\\chromedriver.exe");
    driver = new ChromeDriver();}
driver.manage().window().maximize();
driver.manage().deleteAllCookies();
driver.manage().timeouts().pageLoadTimeout(20, TimeUnit.SECONDS);
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get(prop.getProperty("url"));
}
}

Below is the test cases class which I am running through TestNG

package com.pvi.qa.testcases;

import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

import com.pvi.qa.base.TestBase;
import com.pvi.qa.pages.HomePage;
import com.pvi.qa.pages.LoginPage;

public class LoginPageTest extends TestBase{
    LoginPage loginPage;
    HomePage homePage;


    public LoginPageTest() {
        super();
        }

    @BeforeMethod
    public void setUp() {
        initialization();
        loginPage = new LoginPage();
    }


    @Test
    public void logintest() {
        homePage = loginPage.login(prop.getProperty("username"), prop.getProperty("password"));
    }

    @AfterMethod
    public void tearDown() {
        driver.quit();
    }

}

And below is the error I am getting -

[RemoteTestNG] detected TestNG version 6.14.3
org.testng.TestNGException: 
Cannot instantiate class com.pvi.qa.testcases.LoginPageTest
    at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:30)
    at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:423)
    at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:336)
    at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:125)
    at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:190)
    at org.testng.TestClass.getInstances(TestClass.java:95)
    at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:81)
    at org.testng.TestClass.init(TestClass.java:73)
    at org.testng.TestClass.<init>(TestClass.java:38)
    at org.testng.TestRunner.initMethods(TestRunner.java:389)
    at org.testng.TestRunner.init(TestRunner.java:271)
    at org.testng.TestRunner.init(TestRunner.java:241)
    at org.testng.TestRunner.<init>(TestRunner.java:192)
    at org.testng.remote.support.RemoteTestNG6_12$1.newTestRunner(RemoteTestNG6_12.java:33)
    at org.testng.remote.support.RemoteTestNG6_12$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_12.java:66)
    at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:713)
    at org.testng.SuiteRunner.init(SuiteRunner.java:260)
    at org.testng.SuiteRunner.<init>(SuiteRunner.java:198)
    at org.testng.TestNG.createSuiteRunner(TestNG.java:1295)
    at org.testng.TestNG.createSuiteRunners(TestNG.java:1273)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1128)
    at org.testng.TestNG.runSuites(TestNG.java:1049)
    at org.testng.TestNG.run(TestNG.java:1017)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:24)
    ... 25 more
Caused by: java.lang.NullPointerException
    at java.base/java.io.FileInputStream.<init>(Unknown Source)
    at java.base/java.io.FileInputStream.<init>(Unknown Source)
    at com.pvi.qa.base.TestBase.<init>(TestBase.java:20)
    at com.pvi.qa.testcases.LoginPageTest.<init>(LoginPageTest.java:17)
    ... 30 more

I have tried everything but not worked for me, Please let me know why I am getting this error. Thanks

Answer 1

The lowest 'caused by' section points you to the underlying exception in your base class constructor: you are calling System.getProperty with a file path; that will probably return null. To me it looks like the whole call shouldn't be there, and you just want to pass the file path to the FileInputStream constructor (or read it from a system property with some key)