How to convert an existing assembly to a ms unit test assembly?

c# .net unit-testing visual-studio-2010 built-in
Patrice Pezillier picture Patrice Pezillier · Jun 10, 2010 · Viewed 7.5k times · Source

In Visual Studio 2010 Pro, how can I easily convert a classic assembly to a ms unit test assembly ?

It there a flag to activate in the .csproj file ?

Answer

Dror Helper picture Dror Helper · Apr 24, 2012

The problem is that test projects are "marked" on the project file - you can convert a class library to Test project follow these four simple steps:

  1. Unload the project (.prj) file and then open it for update.

  2. add the following line to the project
    C#: 

    <Project>
 <PropertyGroup>
  <AssemblyName>....</AssemblyName>
  <!-- add this line below -->
  <ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
 </PropertyGroup>
</Project>

    VB - <ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{F184B08F-C81C-45F6-A57F- 5ABD9991F28F}</ProjectTypeGuids>

  3. Re-load the project back
  4. Run you (now working) tests

Note that you'll need to manually add reference to Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll in order to be able to use test related attributes

Update: In the upcoming MSTest V2 this will not be nesessery as MSTest becomes a NuGet package which works just like NUnit/XUnit

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