Cannot get FsUnit.Xunit working in VS 2012

[PatrickMcDonald]

1. Create a new F# Library project
2. From Package Manager Console, Install-Package FsUnit.xUnit
3. Run Test(s) (using TestDriven.NET)

------ Test started: Assembly: Library1.dll ------

Test 'Library1.Tests.Given a LightBulb that has had its state set to true.when I convert it to a string it becomes "On".' failed:
System.IO.FileLoadException : Could not load file or assembly 'NHamcrest, Version=1.2.1.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
at Library1.Tests.Given a LightBulb that has had its state set to true.when I convert it to a string it becomes "On".()

Test 'Library1.Tests.Given a LightBulb that has had its state set to true.when I ask whether it is On it answers true.' failed:
System.IO.FileLoadException : Could not load file or assembly 'NHamcrest, Version=1.2.1.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
at Library1.Tests.Given a LightBulb that has had its state set to true.when I ask whether it is On it answers true.()

0 passed, 2 failed, 0 skipped, took 2.01 seconds (xUnit.net 1.9.1 build 1600).

[dmohl]

Unfortunately, I wasn't able to recreate this issue after following steps 1 and 2 then running the tests with xunit.gui.clr4.exe (I don't currently have TestDriven.NET installed). Do the sample tests run correctly for you with xunit.gui.clr4.exe, but not with TestDriven.NET?

[PatrickMcDonald]

Thanks Dan,

I found the problem, I had version 1.2.0 of NHamcrest.dll on my path (installed by an old version of Gallio) and MSBuild was falling over.

Weirdly, Visual Studio 2010 didn't have a problem with this

There was a conflict between "NHamcrest, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a" and "NHamcrest, Version=1.2.1.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a".
    "NHamcrest, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a" was chosen because it was primary and "NHamcrest, Version=1.2.1.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a" was not.
    References which depend on "NHamcrest, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a" [C:\Program Files\Gallio\bin\NHamcrest.dll].
        C:\Program Files\Gallio\bin\NHamcrest.dll
          Project file item includes which caused reference "C:\Program Files\Gallio\bin\NHamcrest.dll".
            NHamcrest, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a
    References which depend on "NHamcrest, Version=1.2.1.0, Culture=neutral, PublicKeyToken=31c3ea0b6fcf8c4a" [C:\Work\temp\Library1\packages\FsUnit.xUnit.1.1.0.1\Lib\Net40\NHamcrest.dll].
        C:\Work\temp\Library1\packages\FsUnit.xUnit.1.1.0.1\Lib\Net40\FsUnit.Xunit.dll
          Project file item includes which caused reference "C:\Work\temp\Library1\packages\FsUnit.xUnit.1.1.0.1\Lib\Net40\FsUnit.Xunit.dll".
            FsUnit.Xunit
        C:\Work\temp\Library1\packages\FsUnit.xUnit.1.1.0.1\Lib\Net40\FsUnit.CustomMatchers.dll
          Project file item includes which caused reference "C:\Work\temp\Library1\packages\FsUnit.xUnit.1.1.0.1\Lib\Net40\FsUnit.CustomMatchers.dll".
            FsUnit.Xunit
            FsUnit.CustomMatchers