使用Visual Studio Online构建服务器发现xUnit.net测试的异常

我正在使用Xunit.net与Visual Studio Online托管构建 . 我的测试正在本地和构建服务器上被发现并运行良好 . 但是在构建服务器上，我得到了这个异常（导致构建达到“部分成功”状态） . 这很奇怪，因为我的所有测试实际上都是被发现和运行的 .

[xUnit.net 00:00:01.3170293] Exception discovering tests from C:\a\bin\xunit.runner.visualstudio.testadapter.dll: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value HKLM\Software\Microsoft\Fusion!EnableLog to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

   at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes)
   at System.Reflection.RuntimeAssembly.GetExportedTypes()
   at Xunit.Sdk.Executor.EnumerateTests..ctor(Executor executor, Object _handler)$$RethrowMarker$$   at ExceptionExtensions.RethrowWithNoStackTraceLoss(Exception ex)
   at Xunit.RemoteAppDomainManager.CreateObjectTObject
   at Xunit.Xunit1Executor.EnumerateTests(ICallbackEventHandler handler)
   at Xunit.Xunit1.Find(Predicate`1 filter, Boolean includeSourceInformation, IMessageSink messageSink)
   at Xunit.Xunit1.Find(Boolean includeSourceInformation, IMessageSink messageSink)
   at Xunit.XunitFrontController.Find(Boolean includeSourceInformation, IMessageSink messageSink)
   at Xunit.Runner.VisualStudio.TestAdapter.VsTestRunner.GetTests(IEnumerable`1 sources, IMessageLogger logger, XunitVisualStudioSettings settings, Stopwatch stopwatch)

See http://go.microsoft.com/fwlink/?LinkId=254169

我在测试项目中安装了以下nuget包：

• xunit 1.9.2

• xunit.runner.visualstudio 0.99.2

其他单元测试框架，如MS Test和NUnit，可以正常运行 . 这让我觉得问题出在Xunit.net而不是Visual Studio Online上 .

我还在xUnit.net GitHub上打开了一个问题，但它仍未解决 . https://github.com/xunit/xunit/issues/47

我怎样才能使这个工作？有没有人知道一个解决方法？我可以以某种方式抑制错误消息吗？