Facing an issue when trying to build an BDD framework using cucumber in loading url

Question

Getting error: java.lang.NullPointerException: Cannot invoke "org.openqa.selenium.WebDriver.get(String)" because "this.driver" is null

I am trying to create sample framework but facing issue as url is not opening correctly and also browser is opening twice .

Chrome browser is opening twice and also we are seeing null value when debugging driver.

Below is the step definition file:

public class steps  {
    
    private WebDriver driver;

    Baseclass base = new Baseclass(driver);
    Loginpage login = new Loginpage(driver);

    public static Logger logfile = LogManager.getLogger(steps.class.getName());
    
    @Given("open chrome browser")
    public void openBrowser() {
        base.intiatingDriver();
        
    }
    @And("Login to application url")
    public void loginAppicaltionUrl()  {
        login.openUrlLogin("https://opensource-demo.orangehrmlive.com/web/index.php/auth/login");
        
    }
    @And("^enter the valid \"(.*)\"$")
    public void enterValidUsername(String username) {
        login.enteringUsername(username);
    }
    
    @And("^enter valid \"(.*)\"$")
    public void enterValidPassword(String password) {
        login.enteringPassword(password);   
    }

Baseclass:

public class Baseclass {
    
    private  WebDriver driver=null;
    
    public static Logger logfile = LogManager.getLogger(Baseclass.class.getName());

    public static String parentWindow;

    
    public Baseclass(WebDriver driver) {
        
        this.driver = driver;
        PageFactory.initElements(driver, this);
        }
    
    public void intiatingDriver() {
        
        driver =new ChromeDriver();
        driver.manage().window().maximize();

    }

    public void openUrl() throws Throwable{
        driver.get("https://opensource-demo.orangehrmlive.com/web/index.php/auth/login");
        threadsleep(5000);
        logfile.info("Url opened successfully");
    }
    
    public void sendKeysUsingCss(WebElement element,String username) {
        driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(40));
        element.sendKeys(username);
        
    }

Login class:

public class Loginpage  {                                                     
                                                                                                                                                                                                                      
    private  WebDriver driver=null;                                           
                                                                                                                                                   
    public Loginpage(WebDriver driver) {                                      
        this.driver = driver;                                                 
        PageFactory.initElements(driver, this);                               
                                                                              
    }                                                                         
                                                                              
    Baseclass base = new Baseclass(driver);                                   
                                                                              
                                                                              
    @FindBy(how=How.CSS, using="input[name^='username']")                     
    private WebElement name;                                                  
                                                                              
    @FindBy(how=How.CSS,using="input[name^='password']")                      
    private WebElement passwrd;                                                                                                                      
                                                                              
    public void openUrlLogin(String url) {                                    
        try {                                                                 
            driver.get(url);                                                  
            driver.manage().window().maximize();                              
            base.threadsleep(5000);                                           
            base.logfile.info("Url opened successfully");                     
        } catch (Throwable e) {                                               
            e.printStackTrace();                                              
            System.out.println(e);                                            
            Assert.fail("Url not opened");                                    
                                                                              
        }                                                                     
    }                                                                         
                                                                              
    public void enteringUsername(String username) {                           
        name.sendKeys(username);                                              
                                                                              
    }

Yaroslavm · Accepted Answer · 2023-08-22 07:49:04Z

0

You are getting NullPointerException, because you haven't inited any driver instance.

In BaseClass and LoginClass you pass driver in constructor, then call PageFactory.initElements(driver, this);. initElements method expects that driver has already exist as instance, but at that moment it's null.

This lines are called in runtime on class creation. In this moment you don't have any instance of driver, so you get the exception.

   private WebDriver driver;

   Baseclass base = new Baseclass(driver);
   Loginpage login = new Loginpage(driver);

To solve this you should create a method that inits your driver and is called before class creation.

    private WebDriver driver;

    @BeforeClass
    public static void setupAll() {
        WebDriverManager.getInstance().setup();
        driver = new ChromeDriver();
    }

Where WebDriverManager defined as a depenedency in pom.xml

      <dependency>
            <groupId>io.github.bonigarcia</groupId>
            <artifactId>webdrivermanager</artifactId>
            <version>5.3.2</version>
      </dependency>

answered Aug 22, 2023 at 7:49

Yaroslavm

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4 Comments

guru Over a year ago

Thanks , i have added the chrome driver initiation but in login page url method is getting null in driver public void intiatingDriver() { System.setProperty("webdriver.chrome.driver", "src/test/resources/drivers/chromedriver.exe"); driver =new ChromeDriver(); driver.manage().window().maximize(); }

Yaroslavm Over a year ago

You don't need this method. You can just init your browser like I suggested, in test or base test method, using @BeforeClass annotation.

guru Over a year ago

Ya i did it in baseclass still not able to open the application url

Yaroslavm Over a year ago

In your implementation you need to do it in public class steps.

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