在执行第二个注释时，我刚开始测试ng并面临空指针异常。第一个注释很好

Question

我的代码：

public class NewTest {
    public static WebDriver driver; 

@BeforeSuite(alwaysRun=true)
public void intiate() {
          System.setProperty("webdriver.chrome.driver", "C:\\selenium\\chromedriver.exe");
          WebDriver driver = new ChromeDriver();
          String Appurl= "http://toolsqa.com/automation-practice-form/";
          driver. manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS );
          driver.navigate().to(Appurl);

      } 


  @Test  (alwaysRun=true)
  public void Enterusernamedetails() {  
/*    System.setProperty("webdriver.chrome.driver", "C:\\selenium\\chromedriver.exe");
      WebDriver driver = new ChromeDriver();
      String Appurl= "http://toolsqa.com/automation-practice-form/";
      driver. manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS );
      driver.navigate().to(Appurl);*/

      WebElement UsrName = driver.findElement(By.name("firstname"));
      if(UsrName!=null)
      {
          UsrName.sendKeys("Hemamalini");
          System.out.println("First name has been entered");
      }
      else
      {
          System.out.println("First name element is not visible");
      }


  WebElement lastName = driver.findElement(By.name("lastname"));
  if(lastName!=null)
  {
      lastName.sendKeys("K");
      System.out.println("Last name has been entered");
  }
  else
  {
      System.out.println("Last name element is not visible");
  }

  WebElement radbtnSex = driver.findElement(By.id("sex-0"));
  if(radbtnSex!=null)
  {
      radbtnSex.click();
      System.out.println("Sex radio button has been clicked");
  }
  else
  {
      System.out.println("Sex radio button element is not been clicked");
  }

  WebElement radbtnExper = driver.findElement(By.id("exp-2"));
  if(radbtnExper!=null)
  {
      radbtnExper.click();
      System.out.println("Experience radio button has been clicked");
  }
  else
  {
      System.out.println("Experience radio button element is not been clicked");
  }

  WebElement txtDatePicker = driver.findElement(By.id("datepicker"));
  if(txtDatePicker!=null)   
  {
      txtDatePicker.sendKeys("10/11/2017");
      System.out.println("Date has been entered");
  }
  else
  {
      System.out.println("Date element is not visible");
  }

  WebElement chkbox = driver.findElement(By.id("profession-1"));
  if(chkbox!=null)
  {
      chkbox.click();
      System.out.println("Profession checkbox has been clicked");
  }
  else
  {
      System.out.println("Profession checkbox element is not been clicked");
  }

  WebElement chkboxtool = driver.findElement(By.id("tool-2"));
  if(chkboxtool!=null)
  {
      chkboxtool.click();
      System.out.println("Automation tool checkbox has been clicked");
  }
  else
  {
      System.out.println("Automation tool element is not been clicked");
  }

  Select drpContinents = new Select(driver.findElement(By.id("continents")));
  if(drpContinents!=null)
  {
      drpContinents.selectByVisibleText("Australia");
      System.out.println("Automation tool checkbox has been clicked");

  }

  Select drpCommands = new Select(driver.findElement(By.id("selenium_commands")));
  if(drpCommands!=null)
  {
      drpCommands.selectByVisibleText("Switch Commands");
      System.out.println("command has been clicked");
  }

      WebElement button = driver.findElement(By.id("submit"));
      if(button!=null)
      {
          button.click();
          System.out.println("button has been clicked");
      }
      else
      {
          System.out.println("button element is not been clicked");
      }

      WebElement uploadfile = driver.findElement(By.id("photo"));
      if(uploadfile!=null)
      {
          uploadfile.sendKeys("C:\\Users\\391387.CTS\\Documents\\New folder\\Spritz_Selenium_Grid_Setup_v 2 0.docx");
          System.out.println("document has been uploaded");
      }
      else
      {
          System.out.println("button document has not been uploaded");
      }

      driver.quit();
  }

}

Answer 1

问题是您已经多次启动WebDriver driver。

1. public static WebDriver driver;
2. 在@BeforeSuite(alwaysRun=true)中见WebDriver driver = new ChromeDriver();
3. 在@Test (alwaysRun=true)中见WebDriver driver = new ChromeDriver();

这里有3次启动驱动程序，按照TestNG的要求，@BeforeSuites首先运行。更改代码如下：

1. public static WebDriver driver = null;
2. 在@BeforeSuite(alwaysRun=true)中:将下面的代码替换为WebDriver driver = new ChromeDriver(); //WebDriver驱动程序=新的ChromeDriver()；//旧行驱动程序=新的ChromeDriver()；//新行
3. 在代码//System.setProperty("webdriver.chrome.driver"，“C：\selenium\chromedriver.exe”下面的@Test (alwaysRun=true)：注释/删除；//ChromeDriver=新的ChromeDriver()；

希望您理解这是基本的Java代码错误。如果你需要更多的帮助，请告诉我。

Answer 2

在我们的项目中，我们使用单独的类来为我们的测试选择驱动程序，您可以尝试如下：

public class SetupBrowser {

public static WebDriver SetupDriver(String browser) {
    WebDriver driver = null;
    if (browser.equalsIgnoreCase("FF")) {

            System.setProperty("webdriver.gecko.driver","C:\\geckodriver-v0.16.1-win64\\geckodriver.exe");
            DesiredCapabilities capabilitiesFF = DesiredCapabilities.firefox();
            capabilitiesFF.setCapability(FirefoxDriver.MARIONETTE, true);
            //capabilitiesFF.setCapability(FirefoxDriver.PROFILE, true);
            driver = new FirefoxDriver(capabilitiesFF);

    }
    else if (browser.equalsIgnoreCase("IE")) {

        System.setProperty("webdriver.ie.driver", "C:\\IEDriverServer.exe");

        // Setting IE to clean session
        DesiredCapabilities capabilities = DesiredCapabilities.internetExplorer();
        capabilities.setCapability(InternetExplorerDriver.IE_ENSURE_CLEAN_SESSION, true);

        driver = new InternetExplorerDriver(capabilities);

    }
    else {
           driver = new ChromeDriver();
           //////////
               }
    return driver;
}

我们从属性文件中读取浏览器类型。

每当需要打开浏览器时，调用/编写代码：

SetupBrowser.SetupDriver("FF");