IDOC testing: how to upload sample IDOC xml file while outbound IDOCtesting

Hi experts,

can any one tell me , how to upload a sample XML idoc xml(data) file while Outbound IDOC testing;

in WE19 tcode ( insted of manually entering the sample data, i have to import the sample XML/text file into the idoc fields). say IDOC is MATMAS.

Thanks in advance;

Kumar