第二类为TestNG抛出Null Pointer异常

如何解决第二类为TestNG抛出Null Pointer异常

我使用TestNG为每个网页创建了不同的类。我的第一堂课工作得很好，但是第二堂课则抛出了空指针异常。如果我只在一个类中结合使用相同的脚本，则可以正常工作。

下面是我的基类

package Test;
import org.testng.annotations.Test;
import Pages.FM_login;
import org.testng.annotations.BeforeTest;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterTest;
public class Baseclass {
  WebDriver driver;
  FM_login  objLogin;
  @BeforeTest
  public void setup() {
      System.setProperty("webdriver.chrome.driver","C:\\Users\\****\\Downloads\\chromedriver.exe");
        String url = "http://vatlookup.cloudfront.net";
          driver = new ChromeDriver();
          driver.manage().window().maximize();
          driver.get(url);
          driver.manage().timeouts().implicitlyWait(60,TimeUnit.SECONDS);
          String Title = driver.getTitle();
          System.out.println(Title);
          System.out.println("Application Launch successful");
          // Accept the cookie policy
          driver.findElement(By.xpath("//a[@class='cc-btn cc-allow']")).click();
  }
  @Test
  public void Login() {
      objLogin = new FM_login(driver);
      objLogin.GoToLoginScreen();
      objLogin.loginToFleetMatch("abc","123");
      System.out.println("Login Successful");
  }
 @AfterTest(enabled=false)
  public void teardown() {
      driver.close();
}

这是另一堂课

package Test;

import org.openqa.selenium.WebDriver;
import org.testng.annotations.Test;

import Pages.FM_Profile;

public class Profile {
    WebDriver driver;
    FM_Profile objProfile;
    
    
     @Test
      public void Skip_Tutorial() {
          objProfile = new FM_Profile(driver);
          driver.getCurrentUrl();
          objProfile.SkipTutorial();
      }
      
      @Test(enabled=false)
      public void edit_profile() {
          objProfile.edit_profile();
      }
}

下面是第二类的页面对象

package Pages;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;

public class FM_Profile {
    
    WebDriver driver;
    By company_name = By.xpath("//p[@id='company-name']");
    By plan_details = By.xpath("//p[@id='current-plan']");
    By End_tour = By.xpath("//button[@class='driver-close-btn']");
    By edit_profile = By.xpath("//span[contains(text(),'Edit')]");
    By Description = By.xpath("//textarea[@id='mat-input-10']");
    By Upload_image = By.xpath("//div[@class='upload-btn continental-book ng-star-inserted']");
    By Save_profile = By.xpath("//button[@class='save-btn continental-book mat-stroked-button mat-button-base mat-primary editMode cdk-focused cdk-mouse-focused']");
    
    
    public FM_Profile(WebDriver driver) {
        this.driver = driver;
    }
    
    public void SkipTutorial() {
        driver.findElement(End_tour).click();
    }

执行后，显示第二个类的java.lang.NullPointerException

错误

java.lang.NullPointerException
    at Test.Profile.Skip_Tutorial(Profile.java:16)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:567)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:135)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:598)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:821)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1507)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:588)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
    at org.testng.SuiteRunner.run(SuiteRunner.java:286)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1214)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1136)
    at org.testng.TestNG.runSuites(TestNG.java:1066)
    at org.testng.TestNG.run(TestNG.java:1034)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

解决方法

在您的Profile类中，未初始化驱动程序对象。您要初始化的驱动程序对象位于BaseClass和该类的实例中。您还需要在Profile类中初始化驱动程序对象

,

WebDriver从未初始化。

WebDriver驱动程序=新的WebDriver（）;