Question

我正在尝试优化硒测试，并希望更好地控制轮询间隔，因此我决定使用允许访问定义轮询周期的DefaultWait。

然而，出现了意料之外的问题 - IgnoreExceptionTypes似乎无法正常工作或我正在做错误的事情。它会立即失败，而不是在Timeout到期时失败。

我试过了：

new WebDriverWait(driver, tss).Until(ExpectedConditions.TitleContains("Certificate Error")); - 对我来说效果很好，但为了精确，我希望民意调查小于500毫秒;
提供不同的例外类型;
我已删除new WebDriverWait，因此只有DefaultWait存在，显然，因为人们在混合不同的等待对象时遇到问题，请参阅此处：https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/8062
< / LI>
如果我在第一次wait.nntil之前添加Task.Delay(3000).Wait();那么抛出异常，那么它不再抛出它（因为页面能够加载并且元素存在），但后续等待失败以同样的方式。

让我知道这可能是什么原因，我错过了什么？

截图：

我的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Diagnostics;

using OpenQA.Selenium;
using OpenQA.Selenium.IE;
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium.Support.UI;

namespace TestProject1
{
    class Program1
    {
        static void Main(string[] args)
        {

            // Initialize IWebDriver parameters
            var service = InternetExplorerDriverService.CreateDefaultService();
            service.LogFile = @"C:\Users\cbfdbfd\Desktop\IE.log";
            service.LoggingLevel = InternetExplorerDriverLogLevel.Debug;

            // Initialize the IWebDriver
            IWebDriver driver = new InternetExplorerDriver(service);

            // Initialize the DefaultWait<>
            DefaultWait<IWebDriver> wait = new DefaultWait<IWebDriver>(driver);

            wait.Timeout = TimeSpan.FromSeconds(50);
            wait.PollingInterval = TimeSpan.FromMilliseconds(50);
            wait.IgnoreExceptionTypes(typeof(NoSuchElementException));

            driver.Navigate().GoToUrl("https://dfbfd/login");

            wait.Until<bool>((d) => {
                return d.Title.Contains("Certificate Error");
            });

            driver.Navigate()
                .GoToUrl("javascript:document.getElementById('overridelink').click()");

            // handle login
            var username = driver.FindElement(By.Name("username"));
            var password = driver.FindElement(By.Name("password"));

            username.Clear(); username.SendKeys("fdbgfbf");
            password.Clear(); password.SendKeys("bgfbgfb");

            driver.FindElement(By.Id("login-btn")).Click();

            //Task.Delay(3000).Wait();

            // open supply chain profiles
            wait.Until<IWebElement>((d) => {
                return d.FindElement(By.LinkText("fgbgfbgfbgf"));
            });

            driver.FindElement(By.LinkText("gfbgfbgf")).Click();



            // close driver
            Task.Delay(3000).Wait();
            driver.Close();

        }
    }
}

调试日志：

D 2017-06-29 02:39:33:656 Browser.cpp(513) Not in navigating state
D 2017-06-29 02:39:33:661 server.cc(355) Response: {"sessionId":"50577ecf-b46c-40a4-a2e0-ebb61a618d88","status":0,"value":null}

D 2017-06-29 02:39:33:666 server.cc(281) Command: POST /session/50577ecf-b46c-40a4-a2e0-ebb61a618d88/element {"using":"link text","value":"Supply Chain"}
D 2017-06-29 02:39:33:667 command.cc(36) Raw JSON command: { "name" : "findElement", "locator" : { "sessionid" : "50577ecf-b46c-40a4-a2e0-ebb61a618d88" }, "parameters" : {"using":"link text","value":"Supply Chain"} }
D 2017-06-29 02:39:33:667 IECommandExecutor.cpp(544) No alert handle is found
D 2017-06-29 02:39:33:667 ElementFinder.cpp(60) Using FindElement atom to locate element having linkText = Supply Chain
I 2017-06-29 02:39:33:667 Browser.cpp(130) No child frame focus. Focus is on top-level frame
D 2017-06-29 02:39:33:755 VariantUtilities.cpp(100) Result type is JScriptTypeInfo
W 2017-06-29 02:39:34:014 response.cc(77) Error response has status code 7 and message 'Unable to find element with link text == Supply Chain' message
D 2017-06-29 02:39:34:014 server.cc(355) Response: {"sessionId":"50577ecf-b46c-40a4-a2e0-ebb61a618d88","status":7,"value":{"message":"Unable to find element with link text == Supply Chain"}}

D 2017-06-29 02:39:34:563 ElementRepository.cpp(113) Refreshing managed element cache. Found 0 to remove from cache.

堆栈追踪：

OpenQA.Selenium.NoSuchElementException occurred
  HResult=0x80131500
  Message=Unable to find element with link text == Supply Chain
  Source=WebDriver
  StackTrace:
   at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse)
   at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.Remote.RemoteWebDriver.FindElement(String mechanism, String value)
   at OpenQA.Selenium.Remote.RemoteWebDriver.FindElementByLinkText(String linkText)
   at OpenQA.Selenium.By.<>c__DisplayClass6.<LinkText>b__4(ISearchContext context)
   at OpenQA.Selenium.By.FindElement(ISearchContext context)
   at OpenQA.Selenium.Remote.RemoteWebDriver.FindElement(By by)
   at TestProject1.Program.<>c.<Main>b__0_1(IWebDriver d) in C:\Users\bernam\Documents\Visual Studio 2017\Projects\ConsoleApp1\ConsoleApp1\Program.cs:line 90
   at OpenQA.Selenium.Support.UI.DefaultWait`1.Until[TResult](Func`2 condition)

Answer 1

尝试查找单个元素时，我遇到了同样的问题。最后，我通过使用以下代码解决了该问题；用FindElements替换FindElement并检查是否找到一个元素。

WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(timeoutInSeconds));
wait.PollingInterval = TimeSpan.FromSeconds(0.5);
wait.IgnoreExceptionTypes(typeof(NotFoundException), typeof(NoSuchElementException));

wait.Until(drv =>
{                   
    var elementList = drv.FindElements(by);
    return (elementList.Count == 1);
});

Selenium C＃Webdriver - IgnoreExceptionTypes不起作用

1 个答案: