在引导日期选择器中设置日期

Question

我正在学习使用TestNG进行自动化测试。我正在尝试从日期选择器设置值日期。但是我越来越错误了。谁能帮我这个忙。

TestNG

public void Start() throws ParseException, InterruptedException 
  { 
      System.setProperty("webdriver.chrome.driver", "C:\\chromedriver.exe");
      driver = new ChromeDriver();
      driver.get(baseUrl);

      driver.findElement(By.xpath("//*[@id=\"add-edit-form\"]/div[3]/div[1]")); //location of calendar field
      driver.findElement(By.id("Contract_s_date")).click();

      String setDtStr="03/05/2019";       
      String curDateStr = driver.findElement(By.className("dtp-date")).getText();

      Date setDate=new SimpleDateFormat("dd/MM/yyyy").parse(setDtStr); 
      Date curDate=new SimpleDateFormat("MMMM yyyy").parse(curDateStr);


      int monthDiff = Months.monthsBetween(new DateTime(curDate).withDayOfMonth(1),new DateTime(setDate).withDayOfMonth(1)).getMonths();
      boolean isFuture = true;

    if (monthDiff < 0) {
        isFuture= false;
        monthDiff = -1 * monthDiff;
    }

     for(int i=0; i<monthDiff;i++)
     {
         if(isFuture)
         {
             driver.findElement(By.xpath("//*[@id=\"dtp_KoRH3\"]/div/div[1]/div[1]/div[1]/div[3]/a")).click(); // Anchor tag for next button
         }else {
             driver.findElement(By.xpath("//*[@id=\"dtp_KoRH3\"]/div/div[1]/div[1]/div[1]/div[1]/a")).click(); //anchor tag for previous button
         }

     }

   }

错误

Unknown error: Element <input class="form-control" id="Contract_s_date" name="Contract_s_date" type="text" value="" data-dtp="dtp_wvocN"> is not clickable at point (216, 227). Other element would receive the click: <div class="preloader" style="opacity: 0.91354;">...</div>