How do you unit test code decorated with the PrincipalPermission attribute?
For example, this works:
class Program
{
static void Main(string[]
You could try impersonating different users within the test method, if you run the code as an admin you could create a local user account inside the test (or test class) and delete it at the end.
Edit: Sorry, I imagined using impersonate to test a failure case - I should have read your question properly :) I have similar unit tests, and they are able to create local accounts within mstest. Whether this is good practice is another matter.
I see you already did as this page suggests: set the app domain's principal policy to "WindowsPrincipal". For me, Thread.CurrentPrincipal.Identity.Name gives my user name and the test passes using VS 2005 and VS 2008 targetting .NET 2.0, 3.0 & 3.5.
Are you running on Vista/Win7 with UAC and non elevated VS? Otherwise are you able to repro either on another machine, using a different group or by creating another local admin account on your machine and running the tests as this user?