gistfile1.txt

-- Failing test case

 context "Default style and styles coercing image mime type to be something
          different than original" do
    setup do
      rebuild_model :styles => {:thumb=> ["100x100#", :jpg],
                                :small  => ["150x150>", :jpg],
                                :medium => ["300x300>", :jpg],
                                :large => ["500x500>", :jpg]
                                },
                   :default_style => :large
      @dummy = Dummy.new
      @file = File.new(File.join(File.dirname(__FILE__),
                                 "fixtures",
                                 "5k.png"), 'rb')
      @dummy.avatar = @file
    end

    teardown { @file.close }

    context 'when saved' do
      setup do
        @dummy.save
      end

      should 'have the correct path containing correct file mime type' do
        assert_match(/\/system\/avatars\/1\/large\/5k.jpg/, @dummy.avatar.url)
      end

      should 'have the correct url containing correct file mime type' do
        assert_match(/\/system\/avatars\/1\/large\/5k.jpg/, @dummy.avatar.path)
      end
    end
  end

--Fix

attachment.rb

line 121
 #changed style from default  of nil to include the default style

    def path style = default_style #:nodoc:
      original_filename.nil? ? nil : interpolate(@path, style)
    end