How to transfer input file into XI through sender file adapter

Hi

I am quite new to XI. Want to know how I can transfer a file into XI through sender file adapter. I dont have any input file, so I have to create a sample input file and I want to transfer that into XI. Can you please advise me of the steps involved in that. I have finished work in design and directory, now I want to push file the sample file into XI. The receiver adapter is an IDoc adapter. And also a very trivial question. How I can place my sample file into my source directory. Thanks