Make sure FileAdapter files have the right extension

lib/paperclip/io_adapters/stringio_adapter.rb

@@ -2,7 +2,6 @@ module Paperclip
   class StringioAdapter < AbstractAdapter
     def initialize(target)
       @target = target
-      @tempfile = copy_to_tempfile
       cache_current_values
     end
 
@@ -11,15 +10,15 @@ module Paperclip
     private
 
     def cache_current_values
+      self.original_filename = @target.original_filename if @target.respond_to?(:original_filename)
+      self.original_filename ||= "data"
+      @tempfile = copy_to_tempfile(@target)
       @content_type = ContentTypeDetector.new(@tempfile.path).detect
-      original_filename = @target.original_filename if @target.respond_to?(:original_filename)
-      original_filename ||= "data"
-      self.original_filename = original_filename.strip
       @size = @target.size
     end
 
-    def copy_to_tempfile
-      while data = @target.read(16*1024)
+    def copy_to_tempfile(source)
+      while data = source.read(16*1024)
         destination.write(data)
       end
       destination.rewind

spec/paperclip/io_adapters/abstract_adapter_spec.rb

@@ -65,7 +65,6 @@ describe Paperclip::AbstractAdapter do
   it 'uses the original filename to generate the tempfile' do
     @adapter = TestAdapter.new
     @adapter.original_filename = "file.png"
-    require 'pry'; binding.pry
     expect(@adapter.send(:destination).path).to end_with(".png")
   end
 end

spec/paperclip/io_adapters/file_adapter_spec.rb

@@ -18,6 +18,10 @@ describe Paperclip::FileAdapter do
           @subject = Paperclip.io_adapters.for(@file)
         end
 
+        it 'uses the original filename to generate the tempfile' do
+          assert @subject.path.ends_with?(".png")
+        end
+
         it "gets the right filename" do
           assert_equal "5k.png", @subject.original_filename
         end

spec/paperclip/io_adapters/stringio_adapter_spec.rb

@@ -56,6 +56,5 @@ describe Paperclip::StringioAdapter do
       @subject.original_filename = 'image:restricted.png'
       expect(@subject.path).to_not match(/:/)
     end
-
   end
 end