Shopify/identity_cache — pull request #139 by arthurnn (2014-03-26 15:53:52+00:00)
Title: Add inverse_of to tests.

On 4.1 inverse_of is automatic identified :tada:, so we can add it for now, to
make tests compatible with 4.1.

After this is merged, we can start testing on rails 4.1

review @dylanahsmith @jduff @csfrancis