Nicht in der Lage, einen Link auf einer Webseite mit Seitenobjektmodell und TestNG-Framework zu klicken

Question

Kann mir jemand mit diesem Debuggen dieses Codes helfen, die ich mit grundlegenden POM und Testng Framework geschrieben habe. Ich bin nicht in der Lage herauszufinden, warum die Methode zu "ClickJoin" in meinem Testfall nicht aufgerufen wird.

Ich habe im Grunde 2 Seiten eine "Login", die alle Elemente und Methoden auf dieser Seite hat, und eine andere "Login Verification" Seite, wo ich versuche, die Methoden aufzurufen.

Fehler:

java.lang.NullPointerException 
     at com.gptoday.pages.Login.ClickJoin(Login.java:20) 
     at com.gptoday.com.gptoday.testcases.LoginVerification.f(LoginVerification.java:40) 
     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) 

**My code for Login Page:** 
package com.gptoday.pages; 
import org.openqa.selenium.By; 
import org.openqa.selenium.WebDriver; 
public class Login { 

     public WebDriver driver; 
     By join = By.xpath("//*[@id='members']/a[1]"); 
     By username = By.id("username"); 
     By password = By.id("password"); 
     By loginButton = By.name("Login"); 

     /*public Login(WebDriver driver){ 
      this.driver=driver; 
     }*/ 

     public void ClickJoin(){ 
      driver.findElement(join).click(); 
      System.out.println("Clicked Join"); 
     } 

     public void EnterUsername(){ 
      driver.findElement(username).clear(); 
      driver.findElement(username).click(); 
      System.out.println("Username Entered"); 
     } 

     public void EnterPassword(){ 
      driver.findElement(password).clear(); 
      driver.findElement(password).click(); 
      System.out.println("Password Entered"); 
     } 

     public void ClickButton(){ 
      driver.findElement(loginButton).click(); 
      System.out.println("Login Button Clicked"); 
     } 

} 

**My Code for "Verification Testcase":** 
package com.gptoday.com.gptoday.testcases; 

import org.testng.annotations.Test; 
import com.gptoday.pages.Login; 
import org.testng.annotations.BeforeTest; 
import org.testng.annotations.AfterTest; 
import org.junit.AfterClass; 
import org.junit.BeforeClass; 
import org.openqa.selenium.By; 
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.firefox.FirefoxDriver; 
import org.openqa.selenium.firefox.FirefoxProfile; 
import org.openqa.selenium.firefox.internal.ProfilesIni; 

public class LoginVerification { 

    public WebDriver driver; 
    Login obj = new Login(); 

    /*LoginVerification(WebDriver driver){ 
     this.driver =driver; 
    }*/ 

@BeforeTest 
    public void amg() { 
     ProfilesIni prof = new ProfilesIni(); 
     FirefoxProfile ffProfile= prof.getProfile ("vishvesh"); 
     ffProfile.setAcceptUntrustedCertificates(true); 
     ffProfile.setAssumeUntrustedCertificateIssuer(false); 

     String base_url = "https://www.gptoday.com/"; 
     System.setProperty("webdriver.gecko.driver", "G:/Workplace/AutomationSetupFiles/Geckdriver1/geckodriver.exe"); 
     driver = new FirefoxDriver(ffProfile); 
     driver.get(base_url); 
     } 
@Test 
    public void f() { 
     driver.manage().window().maximize(); 
     obj.ClickJoin(); 
     //driver.findElement(By.xpath("//*[@id='members']/a[1]")).click(); 
     obj.EnterUsername(); 
     obj.EnterPassword(); 
     //obj.ClickButton(); 
     //driver.navigate().refresh(); 
     //WebDriverWait wait = new WebDriverWait(driver,10); 
     //wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[@id='fpBox1']/a/div"))); 
     } 

@AfterTest 
    public void just() { 
     System.out.println("Success"); 
    } 

} 

    enter code here 
    @AfterTest 
    public void just() { 
     System.out.println("Success"); 
    } 

} 

Answer 1

Ihr driver Objekt nirgends initialisiert wird, daher ist es null.

public class Login { 

     public WebDriver driver; 
     By join = By.xpath("//*[@id='members']/a[1]"); 
     By username = By.id("username"); 
     By password = By.id("password"); 
     By loginButton = By.name("Login"); 

     public Login(WebDriver driver){ 
      this.driver=driver; 
     } 
     ..... 
} 

Und danach müssen Sie haben:

public class LoginVerification { 

    public WebDriver driver; 
    Login obj = null; 

    @BeforeTest 
    public void amg() { 
     ProfilesIni prof = new ProfilesIni(); 
     FirefoxProfile ffProfile= prof.getProfile ("vishvesh"); 
     ffProfile.setAcceptUntrustedCertificates(true); 
     ffProfile.setAssumeUntrustedCertificateIssuer(false); 

     String base_url = "https://www.gptoday.com/"; 
     System.setProperty("webdriver.gecko.driver", "G:/Workplace/AutomationSetupFiles/Geckdriver1/geckodriver.exe"); 
     driver = new FirefoxDriver(ffProfile); 
     driver.get(base_url); 
     this.driver = driver; 
     obj = new Login(driver); 
     } 
     ........ 
}