dchelimsky/rspec-rails — pull request #18 by vitorbaptista (2012-08-16 13:03:35+00:00)
Title: Explictly stub valid? in mock_model

It's not uncommon to check if the model is valid, and this is mocked by default in newer rspec-rails as well (https://github.com/rspec/rspec-rails/commit/a10c402405b50267bf922f94084eef055502daa9). I think it might be useful to backport.