seattlerb/minitest — pull request #165 by tenderlove (2012-09-23 20:07:22+00:00)
Title: add a backtrace filter object

Rails has it's own backtrace filter, but the code to install the filter [is crazy](https://github.com/rails/rails/pull/2540/files). I think this is due to the backtrace being filtered via a class method on the `MiniTest` constant.

I've pulled the filter in to an object that you can set, which would allow Rails to insert it's own backtrace filter object. I'm not *super* keen on this code, but I really want to avoid the monkey patches on the Rails end. Pushing the backtrace filter to an instance method didn't seem feasible. I'm open to any suggestions!