Selenium C#代码有效，但需要等待或延迟

Question

通过添加while(ele==null(循环，我可以让代码在调试器之外的大部分时间运行和工作。很难看。这让我认为我需要使用包装器来超越FindElements((函数，但不知道如何添加一些延迟。Selenium Webdriver中的Explicit Wait for findElements中有一个示例，但它是用JavaScript编写的。我把这个例子放在下面的代码中。有人能指导我吗？

public void WriteAPost()
{
ele = driver.FindElements(By.CssSelector(".a8c37x1j.ni8dbmo4.stjgntxs.l9j0dhe7.ltmttdrg.g0qnabr5.ojkyduve")).FirstOrDefault(x => x.Text == "Create Post");
while(ele == null)
{
ele = driver.FindElements(By.CssSelector(".a8c37x1j.ni8dbmo4.stjgntxs.l9j0dhe7.ltmttdrg.g0qnabr5.ojkyduve")).FirstOrDefault(x => x.Text == "Create Post");
}
ele.Click();
Thread.Sleep(3000);
ele = driver.SwitchTo().ActiveElement();
PClipboard.SetText("Post text to use for Text Area");
ele.SendKeys(OpenQA.Selenium.Keys.Control + 'v');
Thread.Sleep(3000);
ele = driver.FindElements(By.XPath("//div[@role = 'button']")).FirstOrDefault(x => x.Text == "Post");
while (ele == null)
{
ele = driver.FindElements(By.XPath("//div[@role = 'button']")).FirstOrDefault(x => x.Text == "Post");
}
ele.Click();
Thread.Sleep(3000);
driver.Quit();
}
static class PClipboard
{
public static void SetText(string p_Text)
{
Thread STAThread = new Thread(
delegate ()
{
// Use a fully qualified name for Clipboard otherwise it
// will end up calling itself.
System.Windows.Forms.Clipboard.SetText(p_Text);
});
STAThread.SetApartmentState(ApartmentState.STA);
STAThread.Start();
STAThread.Join();
}
}
}
// Javascript FindElements() wrapper
/// <summary>
/// Allows you to execute the FindElements call but specify your own timeout explicitly for this single lookup
/// </summary>
/// <remarks>
/// If you want no timeout, you can pass in TimeSpan.FromSeconds(0) to return an empty list if no elements match immediately. But then you may as well use the original method
/// </remarks>
/// <param name="driver">The IWebDriver instance to do the lookup with</param>
/// <param name="findBy">The By expression to use to find matching elements</param>
/// <param name="timeout">A timespan specifying how long to wait for the element to be available</param>
public static ReadOnlyCollection<IWebElement> FindElements(this IWebDriver driver, By findBy, TimeSpan timeout)
{
var wait = new WebDriverWait(driver, timeout);
return wait.Until((d) =>
{
var elements = d.FindElements(findBy);
return (elements.Count > 0)
? elements
: null;
});
}

Answer 1

您可以等待满足一个条件：

new WebDriverWait(driver, timeout).Until(ExpectedConditions.ElementExists((By.Id(id))));

或者你可以隐含地等待：

driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(timeInSeconds);

Answer 2

我只是不知道在代码中的哪里等待。

就我个人而言，我的Selenium代码充满了"测试失败报告"；测试并尝试捕获报告故障发生位置的块。如果您以这种方式对代码进行建模，它应该会缩小问题范围，并提示您需要等待的地方。