Question

我在等待WebElement可点击时使用DefaultWait。尽管TargetInvocationException是我在等待期间需要囤积的异常列表中的异常之一，但在达到TimeOut周期之前，我仍然会遇到此异常的测试失败。这不是我的预期。

public static void WaitAndClick(this IWebDriver driver, IWebElement webelement)
    {

        DefaultWait<IWebDriver> fluentWait = new DefaultWait<IWebDriver>(driver)
        {
            Timeout = TimeSpan.FromSeconds(Configuration.WaitTime.TotalSeconds),
            PollingInterval = TimeSpan.FromMilliseconds(500)
        };
        fluentWait.IgnoreExceptionTypes(typeof(TargetInvocationException),typeof(NoSuchElementException),typeof(InvalidOperationException));
        fluentWait.Until(ExpectedConditions.ElementToBeClickable(webelement));
            webelement.Click();

    }

Answer 1

尝试使用WebDriverWait代替DefaultWait<IWebDriver>，这基本上是相同的。

public static void WaitAndClick(this IWebDriver driver, IWebElement webelement)
{
    WebDriverWait fluentWait = new WebDriverWait(driver,Configuration.WaitTime.TotalSeconds);
    //No need to set PollingInterval, default is already 500ms
    fluentWait.IgnoreExceptionTypes(typeof(TargetInvocationException),typeof(NoSuchElementException),typeof(InvalidOperationException));
    fluentWait.Until(ExpectedConditions.ElementToBeClickable(webelement));

    webelement.Click();
}

当完全相同的原因（等待webDriver）有预定义的具体类时，我认为不需要使用Interface。如果问题仍然存在，请回报。

更新：如果它不能解决您的问题，请使用lamba表达式来解析Until（）（public TResult Until<TResult>(Func<T, TResult> condition);）所需的函数

        fluentWait.Until(driver =>
        {
            try
            {
                driver.FindElement(/*By Locator*/).Click();
            }
            catch (Exception ex)
            {
                Type exType = ex.GetType();
                if (exType == typeof(TargetInvocationException) ||
                    exType == typeof(NoSuchElementException) ||
                    exType == typeof(InvalidOperationException))
                {
                    return false; //By returning false, wait will still rerun the func.
                }
                else
                {
                    throw; //Rethrow exception if it's not ignore type.
                }
            }

            return true;
        });

Answer 2

感谢Thodoris Koskinopoulos，这个解决方案对我来说很好：

    public static void WaitAndClick(this IWebDriver driver, IWebElement webelement)
    {
        var fluentWait = new WebDriverWait(driver, Configuration.WaitTime);
        fluentWait.Until(webDriver =>
        {
            try
            {
                webelement.Click();
            }
            catch (Exception ex)
            {
                if (ex is TargetInvocationException ||
                    ex is NoSuchElementException ||
                    ex is InvalidOperationException)
                {
                    return false; //By returning false, wait will still rerun the func.
                }
                {
                    throw; //Rethrow exception if it's not ignore type.
                }
            }
            return true;
        });
    }

Selenium C＃DefaultWait IgnoreExceptionTypes不起作用

2 个答案: