如何解决在硒的webdriver空指针异常与Java

Question

我的Java

public class LaunchApplication { 
    private String LAUNCHAPPLICATION_STATUS=null; 
    private String LAUNCHAPPLICATION_MESSAGE=null; 


    @Test 
    @Parameters({"RUN_USING_SG","BROWSER_CODE","URL","TITLE","PLATFORM","VERSION"}) 
    public void LAUNCHAPPLICATION(String RunUsingSG,String BrowserCode,String URL,String Title,String Platform,String Version) throws MalformedURLException 
    { 
     try 
     { 
      System.out.println(System.getProperty("user.dir")); 
      DesiredCapabilities dc=new DesiredCapabilities(); 
      if(BrowserCode.equalsIgnoreCase("IE32")) 
      { 
       System.setProperty("webdriver.ie.driver",System.getProperty("user.dir")+"/AllDrivers/IEDriverServer_32bit_OS.exe"); 
       dc.setBrowserName("internet explorer"); 
       dc.setVersion(Version); 
       Config.driver = new InternetExplorerDriver(); 

      } 
      if(BrowserCode.equalsIgnoreCase("IE64")) 
      { 
       System.setProperty("webdriver.ie.driver",System.getProperty("user.dir")+"/AllDrivers/IEDriverServer_64bit_OS.exe"); 
       dc.setBrowserName("internet explorer"); 
       dc.setVersion(Version); 
       Config.driver = new InternetExplorerDriver(); 
      } 
      if(BrowserCode.equalsIgnoreCase("FF")) 
      { 
       FirefoxProfile firefoxProfile = new FirefoxProfile(); 
       dc.setBrowserName("firefox"); 
       dc.setVersion(Version); 
       Config.driver=new FirefoxDriver(); 
      } 
      if(RunUsingSG.equalsIgnoreCase("Y")) 
      { 
       Config.driver=new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"),dc); 

      } 

      if(Platform.equalsIgnoreCase("WINDOWS")) 
      {dc.setPlatform(org.openqa.selenium.Platform.WINDOWS);} 
      Config.driver.manage().timeouts().implicitlyWait(30,TimeUnit.SECONDS); 
      Config.driver.get(URL); 
      Config.driver.manage().window().maximize(); 
      //perform final validation 
      if(Config.driver.getTitle().toLowerCase().equalsIgnoreCase(Title)) 
      { 
       LAUNCHAPPLICATION_STATUS="PASS"; 
       LAUNCHAPPLICATION_MESSAGE="EXPECTED BROWSER TITLE:"+Title+", ACTUAL BROWSER TITLE :"+Config.driver.getTitle()+", FOR THE URL:"+URL; 
      } 


     }//end of try 

     catch(Exception generalException) 
     { 
      LAUNCHAPPLICATION_STATUS="FAIL"; 
      LAUNCHAPPLICATION_MESSAGE= "EXPECTED BROWSER TITLE:"+Title+", ACTUAL BROWSER TITLE :"+Config.driver.getTitle()+", FOR THE URL:"+URL+". DETAILS:Exception Occoured:"+generalException.getLocalizedMessage(); 

     } 
    } 

    //@BeforeTest 
    //public void f1(ITestContext ctx) { 

     // if(ctx.getCurrentXmlTest().getParameter("EXECUTE").equals("NO")) 
      // { 
      // throw new SkipException("skiping this test case"); 
      //} 


} 

我通过testng.I执行不知道为什么，当获得空指针异常的错误在上面的代码？当我经过的JUnit执行它工作正常？因此，任何帮助？我想，这可能发生，因为我已经宣布LAUNCHAPPLICATION_STATUS = NULL;或任何其他问题。在TestNGContentHandler.endElement()这是一个非常强大的暗示，这个问题是在XML文件中，而不是你LaunchApplication类中发生

org.testng.TestNGException: java.lang.NullPointerException 
at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:341) 
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:88) 
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204) 
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175) 
Caused by: java.lang.NullPointerException 
at  org.testng.xml.TestNGContentHandler.xmlClasses(TestNGContentHandler.java:342) 
at org.testng.xml.TestNGContentHandler.endElement(TestNGContentHandler.java:693) 
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source) 
at javax.xml.parsers.SAXParser.parse(Unknown Source) 
at org.testng.xml.XMLParser.parse(XMLParser.java:39) 
at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:17) 
at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:10) 
at org.testng.xml.Parser.parse(Parser.java:168) 
at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:311) 
... 3 more 

Answer 1

的异常。这可能是值得提起针对TestNG的错误在这种情况下，提供更清晰的错误信息，这取决于这个问题最终被。

尝试创建一个基本的“Hello World” @Test，这样就可以验证TestNG的（和你的TestNG的配置）运行在所有。如果失败，我们知道这是一个配置问题。否则，如果它工作，你可以缩小到具体的问题测试。