lib/io_streams/streams.rb in iostreams-0.9.1 vs lib/io_streams/streams.rb in iostreams-0.10.0

@@ -90,10 +90,10 @@
     #
     # Example plain text / binary file:
     #   RocketJob::Formatter::Formats.streams_for_file_name('myfile.csv')
     #   => [ :file ]
     def streams_for_file_name(file_name)
-      raise ArgumentError.new("RocketJob Cannot detect file format when uploading to stream: #{file_name.inspect}") if file_name.respond_to?(:read)
+      raise ArgumentError.new("RocketJob Cannot detect file format when uploading to stream: #{file_name.inspect}") if reader_stream?(file_name)
 
       parts      = file_name.split('.')
       extensions = []
       while extension = parts.pop
         break unless @@extensions[extension.to_sym]