Question

Selenium：我必须从下拉列表中选择值，该值取决于在另一个下拉列表中选择的值。

例如：我有两个下拉列表1和2.要填充为2的值取决于1.当我在下拉列表1中选择值时，页面将刷新并填充值2。我必须在下拉列表2中选择值。

我收到错误Element is no longer attached to DOM。

我尝试使用wait.until((ExpectedCondition<Boolean>) new ExpectedCondition<Boolean>()，但它对我没有帮助。出现同样的问题。

我尝试使用WebElement和Select，但都没有帮助。任何人都可以帮我找出解决方案吗？

JavascriptExecutor executor2 = (JavascriptExecutor)driver;
executor2.executeScript("arguments[0].click();", <elementname>);
waitFor(3000);

Select <objectname1>= new Select(driver.findElement(By.id("<ID_for_drop_down_1>")));
selectCourse.selectByVisibleText("<valuetobeselected>");
waitFor(2000);

Select <objectname2>= new Select(driver.findElement(By.id("ID_for_drop_down_2")));
selectCourse.selectByVisibleText("<valuetobeselected>");
waitFor(2000);

我使用waitFor(2000)定义的函数来等待指定的时间段。

Answer 1

如果刷新页面并且您尝试对先前创建的webElement对象执行任何操作，则会出现

Element no longer attached...。在选择第一个下拉列表时，此页面可能会刷新，看起来您在第一个下拉Web元素而不是第二个下拉列表中执行选择操作。

Select dropDown1= new Select(driver.findElement(By.id("<ID_for_drop_down_1>")));
dropDown1.selectByVisibleText("<valuetobeselected>"); // Should be dropdown1
waitFor(2000);
// Page might be refreshed here
Select dropDown2= new Select(driver.findElement(By.id("ID_for_drop_down_2")));
dropDown2.selectByVisibleText("<valuetobeselected>"); // use dropdwon2 not dropdown1

有关详情：Random "Element is no longer attached to the DOM" StaleElementReferenceException

Answer 2

这些是您需要的功能。这将帮助您，因此测试用例不会因测试期间的页面更改而失败。这样一个选择标签的人口。

public void selectByValue(final By by, final String value){
    act(by, 3, new Callable<Boolean>() {
      public Boolean call() {
        Boolean found = Boolean.FALSE;

        wait.until(ExpectedConditions.refreshed(ExpectedConditions.elementToBeClickable(by)));

        Select select = new Select(driver.findElement(by));

        select.selectByValue(value);
        found = Boolean.TRUE; // FOUND IT

        return found;
      }
    });
  }

private void act(By by, int tryLimit, boolean mode, Callable<Boolean> method){

    boolean unfound = true;
    int tries = 0;
    while ( unfound && tries < tryLimit ) {
      tries += 1;
      try {
        wait.until(ExpectedConditions.refreshed(ExpectedConditions.visibilityOfElementLocated(by)));
        unfound = !method.call(); // FOUND IT, this is negated since it feel more intuitive if the call method returns true for success
      } catch ( StaleElementReferenceException ser ) {
        logger.error( "ERROR: Stale element exception. ");
        unfound = true;
      } catch ( NoSuchElementException nse ) {
        logger.error( "ERROR: No such element exception. \nError: "+nse );
        unfound = true;
      } catch ( Exception e ) {
        logger.error( e.getMessage() );
      }
    }

    if(unfound)
      Assert.assertTrue(false,"Failed to locate element");
  }

Selenium：从下拉列表中选择值，该值取决于在另一个下拉列表中选择的值

2 个答案: