使用Protractor的C#单元测试中出现无效操作异常

Question

我有一个简单的测试类，如下所示：

public class MyTest
{
    const string URL = "https://example.com/content/mypage.aspx";
    IWebDriver driver;
    NgWebDriver ngDriver;
    [SetUp]
    public void Setup()
    {
        driver = new ChromeDriver();
        driver.Manage().Timeouts().SetScriptTimeout(TimeSpan.FromSeconds(10));
        ngDriver = new NgWebDriver(driver);
    }
    [TearDown]
    public void Teardown()
    {
        ngDriver.Quit();
    }
    [Test]
    public void Basic()
    {
        ngDriver.Url = URL;
        Assert.IsTrue(ngDriver.FindElement(By.CssSelector("#my")).Displayed);
    }
}

这是HTML片段：

<kendo-button id="my" ng-click="myCtrl.doSomething()">Do Something</kendo-button>

我在Assert.IsTrue线上收到以下错误：

javascript error: [ng:test] http://errors.angularjs.org/1.3.15/ng/test
JavaScript stack:
Error: [ng:test] http://errors.angularjs.org/1.3.15/ng/test
    at Error (native)
    at https://example.com/AngularJS/1.3.15/angular.min.js:6:417
    at Object.Ld [as getTestability] (https://example.com/AngularJS/1.3.15/angular.min.js:18:468)
    at eval (eval at executeAsyncScript (unknown source), <anonymous>:10:13)
    at eval (eval at executeAsyncScript (unknown source), <anonymous>:18:5)
    at executeAsyncScript (<anonymous>:329:26)
    at <anonymous>:345:29
    at callFunction (<anonymous>:237:33)
    at <anonymous>:247:23
    at <anonymous>:248:3
  (Session info: chrome=49.0.2623.87)
  (Driver info: chromedriver=2.21.371459 (36d3d07f660ff2bc1bf28a75d1cdabed0983e7c4),platform=Windows NT 6.1 SP1 x86_64) (UnexpectedJavaScriptError)

堆栈跟踪为：

   at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse)
   at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.Remote.RemoteWebDriver.ExecuteScriptCommand(String script, String commandName, Object[] args)
   at OpenQA.Selenium.Remote.RemoteWebDriver.ExecuteAsyncScript(String script, Object[] args)
   at Protractor.NgWebDriver.WaitForAngular() in c:UsersBrunoProjetsGitHubbbaiaprotractor-netsrcProtractorNgWebDriver.cs:line 315
   at Protractor.NgWebDriver.FindElement(By by) in c:UsersBrunoProjetsGitHubbbaiaprotractor-netsrcProtractorNgWebDriver.cs:line 262

我只得到了Protractor和Selenium WebDriver Nuget包。我是否还需要安装其他东西，或者这实际上是一个代码问题？

Answer 1

您实际上并没有导航到Assert之前的URL？

尝试-

[Test]
public void Basic()
{
   NgDriver.Navigate().GoToUrl(URL);
   Assert.IsTrue(ngDriver.FindElement(By.CssSelector("#my")).Displayed);
}

Answer 2

基于我在下面分享的内容，我发现我的问题不是指定文档的根。在我的标签中，我有

data-ng-app='myApp'

创建量角器驱动程序的代码是：

ngDriver = new NgWebDriver(driver, "[ng-data='myApp']"

Protractor net没有修改这个直接的CSS搜索标准，所以有效的是：

ngDriver = new NgWebDriver(driver, "[data-ng-app='myApp']"

没有答案，但我没有能力发表评论。

我看到了同样的问题。进一步的调查显示，在实例化NgWebDriver时会引发异常。检查对象会显示创建的对象的Location、PageSource、Title和Url成员。所有这些成员都"引发了类型为"System.InvalidOperationException"的字符串｛System.InvalidOperation exception｝的异常"。只有在尝试查找元素时，才会向测试抛出该异常。

我的代码看起来像：

        public DefaultPOM(IWebDriver webDriver, string baseURL)
    {
        driver = webDriver;
        this.baseURL = baseURL;
        driver.Manage().Timeouts().SetScriptTimeout(TimeSpan.FromSeconds(10));
        driver.Navigate().GoToUrl(baseURL);
        ngDriver = new NgWebDriver(driver, "[ng-app='myApp']");
        ngDriver.Manage().Window.Maximize();
        ngDriver.Navigate().GoToUrl(baseURL);
    }

在ngDriver对象创建后立即检查它会显示异常。

如果在导航前关闭同步，则记录异常的驱动程序对象的唯一成员是Location。

        ngDriver = new NgWebDriver(driver, "[ng-app='NCTWebPortal']");
        ngDriver.IgnoreSynchronization=true;
        ngDriver.Manage().Window.Maximize();
        ngDriver.Navigate().GoToUrl(baseURL);
        ngDriver.IgnoreSynchronization = false;