more specific test for parent injected fields

just looked at this guy, there's definitely tests to ensure a child gets a parents injected fields when using coffeescript extends.  changed them to test for equality since the original jawns would pass even if we were getting the object returned by the `inject` function.  which we're not!

here they are if you want them!

![9f1](https://f.cloud.github.com/assets/26769/1526977/3e07b08c-4bed-11e3-92f7-a84b799ac25b.jpg)