Auto-add automatic tags whenever post is updated

Instead of being limited to when it's first uploaded.

test/factories/post.rb

@@ -7,8 +7,8 @@ FactoryGirl.define do
     tag_count 2
     tag_count_general 2
     file_ext "jpg"
-    image_width 100
-    image_height 200
+    image_width 1500
+    image_height 1000
     file_size 2000
     rating "q"
   end

test/unit/post_test.rb

@@ -608,6 +608,33 @@ class PostTest < ActiveSupport::TestCase
         assert_equal(%w(tag1 tag2), post.tag_array_was)
       end
 
+      context "with large dimensions" do
+        setup do
+          @post.image_width = 10_000
+          @post.image_height = 10
+          @post.tag_string = ""
+          @post.save
+        end
+
+        should "have the appropriate dimension tags added automatically" do
+          assert_match(/incredibly_absurdres/, @post.tag_string)
+          assert_match(/absurdres/, @post.tag_string)
+          assert_match(/highres/, @post.tag_string)
+        end
+      end
+
+      context "with a large file size" do
+        setup do
+          @post.file_size = 11.megabytes
+          @post.tag_string = ""
+          @post.save
+        end
+
+        should "have the appropriate file size tags added automatically" do
+          assert_match(/huge_filesize/, @post.tag_string)
+        end
+      end
+
       context "that has been updated" do
         should "create a new version if it's the first version" do
           assert_difference("PostVersion.count", 1) do

test/unit/upload_test.rb

@@ -36,31 +36,6 @@ class UploadTest < ActiveSupport::TestCase
         end
       end
 
-      context "that has incredibly absurd res dimensions" do
-        setup do
-          @upload = FactoryGirl.build(:jpg_upload, :tag_string => "")
-          @upload.image_width = 10_000
-          @upload.image_height = 10
-          @upload.add_dimension_tags!
-        end
-
-        should "have the incredibly_absurdres tag" do
-          assert_match(/incredibly_absurdres/, @upload.tag_string)
-        end
-      end
-
-      context "that has a large flie size" do
-        setup do
-          @upload = FactoryGirl.build(:jpg_upload, :tag_string => "")
-          @upload.file_size = 11.megabytes
-          @upload.add_file_size_tags!(@upload.file_path)
-        end
-
-        should "have the huge_filesize tag" do
-          assert_match(/huge_filesize/, @upload.tag_string)
-        end
-      end
-
       context "image size calculator" do
         should "discover the dimensions for a compressed SWF" do
           @upload = FactoryGirl.create(:upload, :file_path => "#{Rails.root}/test/files/compressed.swf")