Apparently copy_to_local_file wasn't in the FS module

lib/paperclip/storage/filesystem.rb

@@ -67,10 +67,10 @@ module Paperclip
         end
         @queued_for_delete = []
       end
-    end
 
-    def copy_to_local_file(style, local_dest_path)
-      FileUtils.cp(path(style), local_dest_path)
+      def copy_to_local_file(style, local_dest_path)
+        FileUtils.cp(path(style), local_dest_path)
+      end
     end
 
   end

lib/paperclip/storage/fog.rb

@@ -204,4 +204,4 @@ module Paperclip
       end
     end
   end
-end
\ No newline at end of file
+end

test/storage/filesystem_test.rb

@@ -41,6 +41,14 @@ class FileSystemTest < Test::Unit::TestCase
         assert paths.none?{ |path| File.exists?(path) },
           "Expect all the files to be deleted."
       end
+
+      should 'copy the file to a known location with copy_to_local_file' do
+        tempfile = Tempfile.new("known_location")
+        @dummy.avatar.copy_to_local_file(:original, tempfile.path)
+        tempfile.rewind
+        assert_equal @file.read, tempfile.read
+        tempfile.close
+      end
     end
 
     context "with file that has space in file name" do

test/storage/fog_test.rb

@@ -149,6 +149,17 @@ class FogTest < Test::Unit::TestCase
           "Expect all the files to be deleted."
       end
 
+      should 'be able to be copied to a local file' do
+        @dummy.save
+        tempfile = Tempfile.new("known_location")
+        tempfile.binmode
+        @dummy.avatar.copy_to_local_file(:original, tempfile.path)
+        tempfile.rewind
+        assert_equal @connection.directories.get(@fog_directory).files.get(@dummy.avatar.path).body,
+                     tempfile.read
+        tempfile.close
+      end
+
       should "pass the content type to the Fog::Storage::AWS::Files instance" do
         Fog::Storage::AWS::Files.any_instance.expects(:create).with do |hash|
           hash[:content_type]