Failing test for #3017

#3017 Was closed previously due to a lack of a failing test so I'm providing one here. If this is not the desired behavior the documentation should be updated accordingly. Looking at the [Catalog of Built-in Events](http://backbonejs.org/#Events-catalog) section it seems to imply that an error event will be triggered:
 
> when model's or collection's request to remote server has failed