new

# File actionpack/lib/action_controller/test_process.rb, line 311
    def initialize(path, content_type = 'text/plain')
      raise "file does not exist" unless File.exist?(path)
      @content_type = content_type
      @original_filename = path.sub(/^.*#{File::SEPARATOR}([^#{File::SEPARATOR}]+)$/) { $1 }
      @tempfile = Tempfile.new(@original_filename)
      FileUtils.copy_file(path, @tempfile.path)
    end