brynary/rack-test — pull request #67 by dosire (2012-11-06 13:45:16+00:00)
Title: Allow testers to request the tempfile attribute.

This will fix error and solutions such as those mentioned in http://stackoverflow.com/questions/7793510/mocking-file-uploads-in-rails-3-1-controller-tests and http://www.ruby-forum.com/topic/2472338#1019355