FAILED CONFIGURATION：@AfterMethod tearDown

Question

iam新的硒webdriver。 iam试图在两个浏览器上运行Testng测试Parellel，但iam被触发，出现以下错误。当试图运行。下面

package rough; 


import org.testng.annotations.AfterMethod; 
import org.testng.annotations.Optional; 
import org.testng.annotations.Parameters; 
import org.testng.annotations.Test; 
import org.testng.annotations.BeforeMethod; 
import org.testng.Assert; 

import java.util.regex.Pattern; 
import java.util.concurrent.TimeUnit; 

import org.junit.*; 

import static org.hamcrest.CoreMatchers.*; 

import org.openqa.selenium.*; 
import org.openqa.selenium.chrome.ChromeDriver; 
import org.openqa.selenium.firefox.FirefoxDriver; 
import org.openqa.selenium.ie.InternetExplorerDriver; 
import org.openqa.selenium.support.ui.Select; 

public class Browsers { 
    private WebDriver driver; 
    private String baseUrl; 
    private boolean acceptNextAlert = true; 
    private StringBuffer verificationErrors = new StringBuffer(); 

    @BeforeMethod 
    public void tearDown1() throws Exception { 
     System.out.println("Hello starting"); 
    } 
    @Parameters("BROWSER") 
public void setUp(@Optional String BROWSER) throws Exception { 

    //To run test case parallely in different browsers 
      if(BROWSER.equalsIgnoreCase("FF")) 
      { 
      //System.out.println(“Firefox driver would be used”); 
      driver = new FirefoxDriver(); 
      } 
      else 
      if(BROWSER.equalsIgnoreCase("IE")) 
      { 
      //System.out.println(“Ie webdriver would be used”); 
       System.setProperty("webdriver.ie.driver", "g:/Selenium Jar Files/IEDriverServer.exe"); 
      driver = new InternetExplorerDriver(); 
      } 

    // driver = new FirefoxDriver(); 
    baseUrl = "http://book.theautomatedtester.co.uk/"; 
    driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS); 
    } 

    @Test 
    public void test() throws Exception { 
    driver.get(baseUrl + "/chapter1"); 
    driver.findElement(By.id("radiobutton")).click(); 
    new Select(driver.findElement(By.id("selecttype"))).selectByVisibleText("Selenium RC"); 
    } 

    @AfterMethod 
    public void tearDown() throws Exception { 
    driver.quit(); 
    String verificationErrorString = verificationErrors.toString(); 
if (!"".equals(verificationErrorString)) { 
    Assert.fail(verificationErrorString); 
    } 
    } 

    private boolean isElementPresent(By by) { 
    try { 
     driver.findElement(by); 
     return true; 
    } catch (NoSuchElementException e) { 
     return false; 
    } 
    } 

    private boolean isAlertPresent() { 
    try { 
     driver.switchTo().alert(); 
     return true; 
    } catch (NoAlertPresentException e) { 
     return false; 
    } 
    } 

    private String closeAlertAndGetItsText() { 
    try { 
     Alert alert = driver.switchTo().alert(); 
     String alertText = alert.getText(); 
     if (acceptNextAlert) { 
     alert.accept(); 
     } else { 
     alert.dismiss(); 
     } 
     return alertText; 
    } finally { 
     acceptNextAlert = true; 
    } 
    } 
} 

是XML

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd"> 
<suite name="Suite" parallel="True"> 
    <test name="Test"> 
    <parameter name = "BROWSER" value="FF"></parameter> 
    <classes> 
      <class name="rough.Browsers"/> 
    </classes> 
    <test name="Test"> 
    <parameter name = "BROWSER" value="IE"></parameter> 
    <classes> 
     <class name="rough.Browsers"/> 
    </classes> 
    </test> <!-- Test --> 
</suite> <!-- Suite --> 

荫得到堆栈跟踪

[TestNG] Running: 
    C:\Users\Administrator\AppData\Local\Temp\testng-eclipse--757511090\testng-customsuite.xml 

Hello starting 
FAILED CONFIGURATION: @AfterMethod tearDown 
java.lang.NullPointerException 
    at rough.Browsers.tearDown(Browsers.java:65) 
    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:84) 
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564) 
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213) 
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:786) 
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901) 
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231) 
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127) 
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111) 
    at org.testng.TestRunner.privateRun(TestRunner.java:767) 
    at org.testng.TestRunner.run(TestRunner.java:617) 
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:334) 
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329) 
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291) 
    at org.testng.SuiteRunner.run(SuiteRunner.java:240) 
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) 
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) 
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224) 
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1149) 
    at org.testng.TestNG.run(TestNG.java:1057) 
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111) 
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204) 
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175) 

请帮我

Answer 1

真正的错误是NullPointerException。我会猜测在你的设置中（或在你的测试中），你会抛出一个错误，然后尝试访问驱动程序，它是空的。

要么把空校验调用driver.close()之前，或者确保驾驶者永远不能为null（我喜欢的第一个选项更好）。

Answer 2

我收到了同样的错误。我的问题是我试图在@afterMethod里面安装驱动程序。我关闭了驱动程序而不是退出，问题解决了。