Add some tests for CassetteApplication.OnPostMapRequestHandler.
Add some tests for CassetteApplication.OnPostMapRequestHandler.

honestegg/cassette,honestegg/cassette,andrewdavey/cassette,honestegg/cassette,damiensawyer/cassette,damiensawyer/cassette,BluewireTechnologies/cassette,andrewdavey/cassette,andrewdavey/cassette,BluewireTechnologies/cassette,damiensawyer/cassette