testing - Assert file had been created in Junit (Java 6) -

i'd write integration java program takes input file source directory, copies staging, writes result of processing output directory , removes temporary files staging. it's easy enough check output ok, there easy way check staging area being used correctly? 2 things come mind: monitoring folder file system events (any nice wrappers that?), or advanced permissions game (to allow create not delete). suggestions?

thanks lot!

n.b. java 6 on windows...

assuming you're dead set on doing this, think easiest approach going checking file in staging folder after supposed have been copied , checking it's not there after it's supposed have been deleted.

file f = new file(filepathstring); if(f.exists() && !f.isdirectory()) { /* */} 

how check if file exists in java?