Merge pull request #2748 from r7kamura/version-const-name

Change version constant naming pattern

lib/carrierwave/uploader/versions.rb

@@ -20,7 +20,7 @@ def configure(options, &block)
         def build(superclass)
           return @klass if @klass
           @klass = Class.new(superclass)
-          superclass.const_set("#{@name.to_s.camelize}VersionUploader", @klass)
+          superclass.const_set("VersionUploader#{@name.to_s.camelize}", @klass)
 
           @klass.version_names += [@name]
           @klass.versions = {}

spec/uploader/versions_spec.rb

@@ -72,7 +72,7 @@
 
     it "should set the class name" do
       @uploader_class.version :thumb
-      expect(@uploader.thumb.class).to eq @uploader_class.const_get :ThumbVersionUploader
+      expect(@uploader.thumb.class).to eq @uploader_class.const_get :VersionUploaderThumb
     end
 
     it "should remember mount options" do
@@ -153,6 +153,13 @@ def store_dir
       expect(@uploader.small_thumb.class.version_options[:from_version]).to eq(:thumb)
     end
 
+    context 'when version name starts with non-alphabetic character' do
+      it "should set the class name" do
+        @uploader_class.version :_800x600
+        expect(@uploader._800x600.class).to eq @uploader_class.const_get :VersionUploader800x600
+      end
+    end
+
     describe 'with nested versions' do
       before do
         @uploader_class.version :thumb do