Add TestUploadFile.content_type= to match Request.UploadedFile

[#920 state:resolved]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

actionpack/lib/action_controller/test_process.rb

@@ -331,7 +331,7 @@ module ActionController #:nodoc:
     attr_reader :original_filename
 
     # The content type of the "uploaded" file
-    attr_reader :content_type
+    attr_accessor :content_type
 
     def initialize(path, content_type = Mime::TEXT, binary = false)
       raise "#{path} file does not exist" unless File.exist?(path)

actionpack/test/controller/test_test.rb

@@ -531,6 +531,11 @@ XML
     assert_equal content_type, file.content_type
     assert_equal file.path, file.local_path
     assert_equal expected, file.read
+
+    new_content_type = "new content_type"
+    file.content_type = new_content_type
+    assert_equal new_content_type, file.content_type
+
   end
 
   def test_test_uploaded_file_with_binary