passing tests for new vertical layout based on file size

Gemfile.lock

@@ -7,7 +7,7 @@ GIT
 PATH
   remote: .
   specs:
-    compass (0.12.0.alpha.0.38cf0e5)
+    compass (0.12.0.alpha.0.7a18375)
       chunky_png (~> 1.2)
       fssm (>= 0.2.7)
       sass (~> 3.1)

lib/compass/sass_extensions/sprites/layout_methods.rb

@@ -16,6 +16,7 @@ module Compass
             calculate_horizontal_positions
             calculate_width
           else
+            @images.sort! {|a,b| File.size(b.file) <=> File.size(a.file)} #put small images first
             calculate_width
             calulate_vertical_postions
             calculate_height

lib/compass/sprite_importer.rb

@@ -80,7 +80,7 @@ module Compass
       end
     end
     
-    # Returns the sass _options for this sprite
+    # Returns the sass_options for this sprite
     def self.sass_options(name, importer, options)
       options.merge!(:filename => name, :syntax => :scss, :importer => importer)
     end

test/units/sprites/sprite_map_test.rb

@@ -115,5 +115,11 @@ class SpriteMapTest < Test::Unit::TestCase
     FileUtils.rm base.filename
   end
   
+  it "should generate vertical sprites in decending order" do
+    sizes = @base.images.map{|image| File.size(image.file) }
+    assert_equal sizes.min, File.size(@base.images.first.file)
+    assert_equal sizes.max, File.size(@base.images.last.file)
+  end
+  
   
 end