visual-studio-2017 - VS 2017 Test Explorer窗口空引用异常

所以基本上，当我使用nunit3和specflow打开我的解决方案时，VS 2017(15.3.2。)中的 Selenium UI测试在测试资源管理器窗口中出现以下异常和错误:



有没有办法解决这个问题？有一个解决方法，但是它很荒谬...如果我在没有任何项目的情况下启动VS 2017，然后从最近打开该项目，则它正常工作。

An exception was encountered while constructing the content of this frame.  This information is also logged in "C:\Users\USER\AppData\Roaming\Microsoft\VisualStudio\15.0_6ae63cad\ActivityLog.xml".

Exception details:
System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.TestWindow.VsHost.TestWindowToolWindow.InvokeSwapInRealTestWindow(String eventName)
   at Microsoft.VisualStudio.TestWindow.VsHost.TestWindowToolWindow.OnToolWindowCreated()
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, UInt32 flags)
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, ProvideToolWindowAttribute tool)
   at Microsoft.VisualStudio.Shell.Package.FindToolWindow(Type toolWindowType, Int32 id, Boolean create, ProvideToolWindowAttribute tool)
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Guid& toolWindowType, Int32 id)
   at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsToolWindowFactory.CreateToolWindow(Guid& toolWindowType, UInt32 id)
   at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.ConstructContent()


ActivityLog.xml content:

  <entry>
    <record>678</record>
    <time>2017/09/15 12:43:31.678</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>Construction of frame content failed.&#x000D;&#x000A;Frame identifier: ST:0:0:{e1b7d1f8-9b3c-49b1-8f4f-bfc63a88835d}&#x000D;&#x000A;Frame caption: Test Explorer&#x000D;&#x000A;Exception details:&#x000D;&#x000A;System.NullReferenceException: Object reference not set to an instance of an object.&#x000D;&#x000A;   at Microsoft.VisualStudio.TestWindow.VsHost.TestWindowToolWindow.InvokeSwapInRealTestWindow(String eventName)&#x000D;&#x000A;   at Microsoft.VisualStudio.TestWindow.VsHost.TestWindowToolWindow.OnToolWindowCreated()&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, UInt32 flags)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, ProvideToolWindowAttribute tool)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.FindToolWindow(Type toolWindowType, Int32 id, Boolean create, ProvideToolWindowAttribute tool)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Guid&amp; toolWindowType, Int32 id)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsToolWindowFactory.CreateToolWindow(Guid&amp; toolWindowType, UInt32 id)&#x000D;&#x000A;   at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.ConstructContent()</description>
  </entry>

最佳答案

如果您在启动时将Test Explorer放在焦点上，则会出现此问题。
临时解决方案是在关闭VisualStudio之前单击另一个TAB(解决方案资源管理器)，这样启动时就不会将焦点放在TestExplorer上。

引用:https://developercommunity.visualstudio.com/content/problem/117601/test-explorer-nullreferenceexception-on-startup.html

关于visual-studio-2017 - VS 2017 Test Explorer窗口空引用异常，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/45883508/