如何验证 Facebook 上的月份下拉菜单是否包含任何重复条目

Question

 String[] arr = {"Month","Jan","Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 WebElement dropDown = getDriver().findElement(By.id("month"));
 Select select = new Select(dropDown);
 List<WebElement> options = select.getOptions();
 for(WebElement we : options){
     for(int i = 1; i<arr.length; i++){
         if(we.getText().equals(arr[i])){
             System.out.println("Matched" );
             break;
         }
     }
 }

我想通过在Java中使用Selenium在Facebook下拉菜单上找到重复的月份。

我尝试了findelement，web元素，但我无法做到这一点。马上;我可以将月份与网页相匹配。原始问题是这样的：查找月份下拉列表是否包含任何重复项。如果是，则打印出重复的值。谢谢

Answer 1

由于您的用例是使用Selenium和Java在Facebook下拉列表中查找重复的月份，因此您实际上不需要引用数组。要查找月份下拉列表是否包含任何重复项并打印出重复的值，您可以使用以下解决方案：

• 此代码块从 Facebook 的下拉列表中提取月份列表：

  System.setProperty("webdriver.chrome.driver", "C:\Utility\BrowserDrivers\chromedriver.exe");
  WebDriver driver = new ChromeDriver();
  driver.get("https://www.facebook.com");
  WebElement dropDown = driver.findElement(By.id("month"));
  Select select = new Select(dropDown);
  List<WebElement> options = select.getOptions();
  ArrayList<String> months = new  ArrayList<>();
  for(WebElement we : options)
      months.add(we.getText());
  System.out.println("Current list of months: " +months);
  

• 为了通过此代码块进行演示，我们将添加 3 个重复条目：

  months.add("Month");
  months.add("Feb");
  months.add("Dec");
  

• 在这个代码块中，我们创建了一个函数来返回重复的月份：

  public static Set<String> findDuplicates(List<String> listContainingDuplicates)
  { 
      final Set<String> setToReturn = new HashSet<>();
      final Set<String> set1 = new HashSet<>();
      for (String myString : listContainingDuplicates)
      {
          if (!set1.add(myString))
              setToReturn.add(myString);
      }
      System.out.println("Unique months: " +set1);
      return setToReturn;
  }
  

• 现在，您可以按如下方式调用该函数findDuplicates()：

  System.out.println("Duplicated months: " +findDuplicates(months));
  

• 因此，完整的解决方案将是：

  package Duplicates;
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  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.support.ui.Select;
  
  public class Find_Duplicates_In_List {
      public static void main(String[] args) {
          System.setProperty("webdriver.chrome.driver", "C:\Utility\BrowserDrivers\chromedriver.exe");
          WebDriver driver = new ChromeDriver();
          driver.get("https://www.facebook.com");
          WebElement dropDown = driver.findElement(By.id("month"));
          Select select = new Select(dropDown);
          List<WebElement> options = select.getOptions();
          ArrayList<String> months = new  ArrayList<>();
          for(WebElement we : options)
          months.add(we.getText());
          System.out.println("Current list of months: " +months);
          months.add("Month");
          months.add("Feb");
          months.add("Dec");
          System.out.println("Duplicated months: " +findDuplicates(months));
      }
      public static Set<String> findDuplicates(List<String> listContainingDuplicates)
      { 
        final Set<String> setToReturn = new HashSet<>();
        final Set<String> set1 = new HashSet<>();
        for (String myString : listContainingDuplicates)
        {
         if (!set1.add(myString))
          setToReturn.add(myString);
        }
        System.out.println("Unique months: " +set1);
        return setToReturn;
      }
  }
  

• 控制台输出：

  Current list of months: [Month, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sept, Oct, Nov, Dec]
  Unique months: [Jul, Oct, Feb, Apr, Jun, Dec, May, Month, Sept, Aug, Nov, Jan, Mar]
  Duplicated months: [Month, Feb, Dec]