为什么我的TearDown方法抛出以下System.TypeLoadException？

Question

The Set Up

I have TFS 2012, VS 2013 and Test Controller 2013 on my machine which runs Windows 8.1 x64

I have installed a Windows 7 x86 VM and on it I've installed VS 2012, VS 2013 and Test Controller 2012 (in that order). The VM is my test controller.

The Issue

I'm attempting to test a very simple scenario where I have a Coded UI test (manually programmed; I didn't use the record and playback feature) where Internet Explorer is launched with google.com and I search for the term calculator

This works just fine on my machine. When I try to run the test via Test Manager, however, I get the following error:

TestCleanup method CalculatorTest.TestCases.CalculateTest.TearDown threw exception. System.TypeLoadException: System.TypeLoadException: Could not load type 'Microsoft.VisualStudio.TestTools.UITesting.ApplicationBase' from assembly 'Microsoft.VisualStudio.TestTools.UITesting, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'..

The browser launches with google.com but it closes soon after without performing the search and the above error message is shown in Test Manager.

Could anyone please help me by shedding some light on the reason behind this?

Answer 1

It seems like a Visual studio versioning issue and I am guessing that since you have both VS2012 and 2013 installed, the incorrect version of the assembly is being loaded. I would have a look at the reference of the assembly that it fails to load and check that in the references, the specificversion property is set to false. If this doesn't work, try removing and re-adding the reference (eg the 2012 framework version) if that is what you are running under.

Answer 2

请尝试将本地副本设置为“ true”作为参考，然后创建一个要使用MTM进行测试的版本。