how the database snapshot will be accessed by testing in database mirroring

I have read it:

In database mirroring If on Mirrored server My database is in Restoring state and I want to give read only access to my testing team then I can create the snapshot. 

ButI don’t know how the testing team will access it, my database is in restoring state.  

 

snapshot is a readonly copy. you can’t add/modify the permissions.

Thanks,But I want to give  access of snapshot  of the Mirrored database.How to do that?I will not give access  on Principal server.

Limitation of snaphot