​If you find yourself with a an empty .coverage file and see errors similar to the below in your event logs you most probably have a corrupt install

(info) .NET Runtime version 4.0.30319.17929 - The profiler has requested that the CLR instance not load the profiler into this process. Profiler CLSID: '{b19f184a-cc62-4137-9a6f-af0f91730165}'. Process ID (decimal): 12624. Message ID: [0x2516].

(Error) TraceLog Profiler failed in initialization due to a lack of instrumentation methods, process vstest.executionengine.x86.exe

 

Check

a) Environment variable VS110COMNTOOLS is set to <vsinstalldir>\common7\tools

b) Regkey HKLM\SOFTWARE\Microsoft\VisualStudio\11.0\InstallDir is set to your <vsinstalldir>\Common7\IDE\

c) covrun32.dll and covrun64.dll exist in "<vsinstalldir>\Team Tools\Dynamic Code Coverage"