使用POM（pagefactory）重新更新的并行执行

Question

我找不到解决方法，所以我在这里发帖寻求帮助。我在并行运行测试时遇到问题（使用POM和page factory）。

*\Testbase类*/

  public WebDriver driver;
    @BeforeClass
    @Parameters("Browsername")
        public void initializeaccount(String Browsername) 
        {
           if(Browsername.equals("chrome")) {
                System.setProperty("webdriver.chrome.driver", "C:\\Users\\User\\eclipse-workspace\\test\\chromedriver.exe");
                 driver = new ChromeDriver();   
            }
              else if(Browsername.equals("chrome1")) {
                    System.setProperty("webdriver.chrome.driver", "C:\\Users\\User\\eclipse-workspace\\test\\chromedriver.exe");
                     driver = new ChromeDriver();   
                }
                  driver.manage().window().maximize();
                  driver.manage().deleteAllCookies(); 
                  driver.manage().timeouts().pageLoadTimeout(testutility.page_Load_Timeout, TimeUnit.SECONDS); 
                  driver.manage().timeouts().implicitlyWait(testutility.page_Load_Timeout, TimeUnit.SECONDS); 
                  driver.get(prop.getProperty("accounturl"));   
        }

*POM类*

public CreateAccountPage()  {
        PageFactory.initElements(driver, this);
    }
    
    //action 
    public String vailidatewebpagetitle() throws InterruptedException
    {
        return driver.getTitle();
    }

*测试用例*

    public Accountpagetest() {
    super(); 
}

@BeforeMethod
public void setup()
{
    
    CreateAccountPage = new CreateAccountPage();    
}
@Test(priority=1)
public void verifycreateaccountwebpagetitle() throws InterruptedException
{
    String title = CreateAccountPage.vailidatewebpagetitle();
    Assert.assertEquals(title, "google");
}

*XML文件*

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="TestSuite" parallel= "tests" thread-count="2">   
<listeners>
        <listener class-name="Report.DownloadReport" />
    </listeners>
 <test name="Testchrome" parallel= "methods" thread-count="5">
 <parameter name="Browsername" value ="chrome"> </parameter>
    <classes>
   <class name="testcases.Accountpagetest"/> 
    </classes>
  </test> <!-- Test -->
<test name="Testchrome2" parallel= "methods" thread-count="5">
 <parameter name="Browsername" value ="chrome1"> </parameter>
    <classes>
   <class name="testcases.Accountpagetest"/> 
</classes>
 </test>
</suite> <!-- Suite -->

我收到java nullpointerexception错误

  ===============================================
TestSuite
Total tests run: 2, Passes: 0, Failures: 2, Skips: 0
===============================================

java.lang.NullPointerException
    at pages.CreateAccountPage.vailidatewebpagetitle(CreateAccountPage.java:44)
    at testcases.Accountpagetest.verifycreateaccountwebpagetitle(Accountpagetest.java:37)
    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:133)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:584)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:172)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:804)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:145)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:830)

java.lang.NullPointerException
    at pages.CreateAccountPage.vailidatewebpagetitle(CreateAccountPage.java:44)
    at testcases.Accountpagetest.verifycreateaccountwebpagetitle(Accountpagetest.java:37)
    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:133)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:584)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:172)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:804)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:145)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:830)

**更新我碰到的错误，/*POM类*\createnewpage方法驱动程序返回一个空参数。

无论如何，我在这里尝试的是运行两个chrome浏览器进行并行测试。

任何有过这个问题的人都可以建议需要做哪些更正？我卡住了。

Answer 1

将参数“Browsername”读入方法参数中，并删除读取方法代码内属性的调用

public WebDriver driver;

@Parameters("Browsername")
    public void initializeaccount(String Browsername) 
    {
        
       if(Browsername.equals("chrome")) {
            System.setProperty("webdriver.chrome.driver", "C:\\Users\\User\\eclipse-workspace\\test\\chromedriver.exe");
             driver = new ChromeDriver();   
        }
          else if(Browsername.equals("chrome1")) {
                System.setProperty("webdriver.chrome.driver", "C:\\Users\\User\\eclipse-workspace\\test\\chromedriver.exe");
                 driver = new ChromeDriver();   
            }
              driver.manage().window().maximize();
              driver.manage().deleteAllCookies(); 
              driver.manage().timeouts().pageLoadTimeout(testutility.page_Load_Timeout, TimeUnit.SECONDS); 
              driver.manage().timeouts().implicitlyWait(testutility.page_Load_Timeout, TimeUnit.SECONDS); 
              driver.get(prop.getProperty("accounturl"));   
    }