Testing a gem which depends on rails' eviroment

[ApuX]

Hi,
I've changed the rails' inflection file for my project in order to support Spanish pluralize and singularize. I've tested it successfully in my rails project.
Now, since it is a common task for me when creating new projects, I want to create a gem for doing this (replace the default inflections file with mine).
The problem is, the gem needs the rails' environment loaded in order to get tested. How can I do that?
I want to test with rspec.

Thanks.