在TestNG中为方法调用获取NullPointerException

Question

我是Selenium的新手，并且写下面代码从ITestContext组中取参数。

代码：

import java.util.concurrent.TimeUnit; 
import org.openqa.selenium.By; 
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.chrome.ChromeDriver; 
import org.openqa.selenium.interactions.Actions; 
import org.testng.ITestContext; 
import org.testng.annotations.BeforeTest; 
import org.testng.annotations.DataProvider; 
import org.testng.annotations.Test; 

public class ITestGroupism { 
WebDriver driver; 

    @BeforeTest(groups={"A","B"}) 
    public void setup() 
    { 
     System.setProperty("webdriver.chrome.driver", "E:\\Automation Jars\\chromedriver_win32\\chromedriver.exe"); 
     driver = new ChromeDriver(); 
     driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 
     driver.get("https://www.google.co.in"); 
    }  

    @Test(dataProvider="SearchProvider", groups="A") 
    public void testMethodA(String author, String searchKey) throws InterruptedException 
    { 
     WebElement searchText = driver.findElement(By.id("sb_ifc0")); 
     Actions actions = new Actions(driver); 
     actions.moveToElement(searchText); 
     actions.click(); 
     actions.sendKeys(searchKey); 
     actions.build().perform(); 
     System.out.println("Welcome ->"+author+" Your search key is "+searchKey); 
     driver.navigate().back(); 
     driver.navigate().forward(); 
     System.out.println("thread will sleep now"); 
     Thread.sleep(2000);  
     } 

    @Test(dataProvider="SearchProvider", groups="B") 
    public void testMethodB(String searchKey) throws InterruptedException 
    { 
     WebElement searchText = driver.findElement(By.id("sb_ifc0")); 
      Actions actions = new Actions(driver); 
      actions.moveToElement(searchText); 
      actions.click(); 
      actions.sendKeys(searchKey); 
      actions.build().perform(); 
      //searchText.sendKeys(searchKey); 
      System.out.println("Welcome Professor"+"Your search key is "+searchKey); 
      driver.navigate().back(); 
      driver.navigate().forward(); 
      System.out.println("thread will sleep now"); 
      Thread.sleep(2000);    
    } 

    @DataProvider(name="SearchProvider") 
    public Object[][] ff(ITestContext c) 
    { 
    Object[][] groupArray =null; 
    for(String group : c.getIncludedGroups()) 
    { 
     if(group.equalsIgnoreCase("A")) 
     { 
      groupArray = new Object[][] 
      { 
      {"Aakash", "India"}, 
      {"Aayush", "US"}, 
      {"Raveena", "UK"}    
      }; 
      break; 
     }else if(group.equalsIgnoreCase("B")) 
     { 
      groupArray= new Object[][] 
       { 
       {"Canada"}, 
       {"New Zealand"}, 
       {"Russia"}    
       }; 
      }break; 
    } 
    return groupArray; 
    } 
} 

但我得到下面的异常：

跳过：testMethodA显示java.lang.NullPointerException在 org.testng.internal.MethodInvocationHelper.invokeDataProvider（MethodInvocationHelper.java：在org.testng.internal.Invoker.handleParameters（Invoker.java:1243）org.testng.internal.Parameters.handleParameters（Parameters.java:430） at org.testng.internal.Invoker.createParameters（Invoker.java:992）at org.testng.internal.Invoker.invokeTestMethods（Invoker.java:1082）at org.testng.internal.TestMethodWorker.invokeTestMethods（TestMethodWorker。的java：129） 在 org.testng.internal.TestMethodWorker.run（TestMethodWorker.java:112） 在org.testng.TestRunner.privateRun（TestRunner.java:778）在 org.testng.TestRunner.run（TestRunner的.java：632）at org.testng.SuiteRunner.runTest（SuiteRunner.java:366）at org.testng.SuiteRunner.runSequentially（SuiteRunner.java:361）at org.testng.SuiteRunner.privateRun（SuiteRunner.java ：319）at org.testng.SuiteRunner.run（SuiteRunner.java:268）at org。 testng.SuiteRunnerWorker.runSuite（SuiteRunnerWorker.java:52） org.testng.SuiteRunnerWorker.run（SuiteRunnerWorker.java:86）at org.testng.TestNG.runSuitesSequentially（TestNG.java:1225）at org.testng。 （TestNG.java:1150） org.testng.TestNG.runSuites（TestNG.java:1075）at org.testng.TestNG.run（TestNG.java:1047）at org.testng.remote。 AbstractRemoteTestNG.run（AbstractRemoteTestNG.java:126） 在org.testng.remote.RemoteTestNG.initAndRun（RemoteTestNG.java:137） 在org.testng.remote.RemoteTestNG.main（RemoteTestNG.java:58）

SKIPPED：testMethodB java.lang.NullPointerException at ....

Answer 1

当您使用组时，您需要在XML文件中定义这些组。

<suite name="Group Suite" verbose="1"> 
<test name="Test"> 
<groups> 
    <run> 
    <include name="A" /> 
    <include name="B" /> 
    </run> 
</groups> 
<classes> 
    <class name="fully.qualied.package.ITestGroupism" /> 
</classes> 
</test> 
</suite> 

更新的代码：

import org.openqa.selenium.By; 
    import org.openqa.selenium.WebDriver; 
    import org.openqa.selenium.WebElement; 
    import org.openqa.selenium.chrome.ChromeDriver; 
    import org.openqa.selenium.interactions.Actions; 
    import org.testng.annotations.BeforeTest; 
    import org.testng.annotations.DataProvider; 
    import org.testng.annotations.Test; 

    import java.io.File; 
    import java.lang.reflect.Method; 
    import java.util.concurrent.TimeUnit; 

    public class ITestGroupism { 
     WebDriver driver; 

     @BeforeTest(groups = {"A", "B"}) 
     public void setup() { 
      System.setProperty("webdriver.chrome.driver", new File("src/test/resources/driver/chromedriver") 
        .getAbsolutePath()); 
      driver = new ChromeDriver(); 
      driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 
      driver.get("https://www.google.co.in"); 
     } 

     @Test(dataProvider = "SearchProvider", alwaysRun = true, groups = "A") 
     public void testMethodA(String author, String searchKey) throws InterruptedException { 
      WebElement searchText = driver.findElement(By.id("sb_ifc0")); 
      Actions actions = new Actions(driver); 
      actions.moveToElement(searchText); 
      actions.click(); 
      actions.sendKeys(searchKey); 
      actions.build().perform(); 
      System.out.println("Welcome ->" + author + " Your search key is " + searchKey); 
      driver.navigate().back(); 
      driver.navigate().forward(); 
      System.out.println("thread will sleep now"); 
      Thread.sleep(2000); 
     } 

     @Test(dataProvider = "SearchProvider", alwaysRun = true, groups = "A") 
     public void testMethodB(String searchKey) throws InterruptedException { 
      WebElement searchText = driver.findElement(By.id("sb_ifc0")); 
      Actions actions = new Actions(driver); 
      actions.moveToElement(searchText); 
      actions.click(); 
      actions.sendKeys(searchKey); 
      actions.build().perform(); 
      //searchText.sendKeys(searchKey); 
      System.out.println("Welcome Professor" + "Your search key is " + searchKey); 
      driver.navigate().back(); 
      driver.navigate().forward(); 
      System.out.println("thread will sleep now"); 
      Thread.sleep(2000); 
     } 

     @DataProvider(name = "SearchProvider") 
     public Object[][] ff(Method method) { 
      Object[][] groupArray = null; 
      if (method.getName().equalsIgnoreCase("testMethodA")) { 
       groupArray = new Object[][] 
         { 
           {"Aakash", "India"}, 
           {"Aayush", "US"}, 
           {"Raveena", "UK"} 
         }; 
      } else if (method.getName().equalsIgnoreCase("testMethodB")) { 
       groupArray = new Object[][] 
         { 
           {"Canada"}, 
           {"New Zealand"}, 
           {"Russia"} 
         }; 
      } 
      return groupArray; 
     } 
    }