rem: if (dbFile.exists()) dbFile.remove(true); 
add: if (dbFile.exists()) try { dbFile.remove(true); } catch(e) { /* stupid windows box */ } 
context: function cleanup(){  // removing rdf  var rdfFile = dirSvc.get("DLoads", Ci.nsIFile);  if (rdfFile.exists()) rdfFile.remove(true);    // removing database  var dbFile = dirSvc.get("ProfD", Ci.nsIFile);  dbFile.append("downloads.sqlite");  if (dbFile.exists()) dbFile.remove(true);  // removing downloaded file  var destFile = dirSvc.get("ProfD", Ci.nsIFile);  destFile.append("download.result");  if (destFile.exists()) destFile.remove(true);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/b4fb1a73e4bdce4f1bf18daf751ff02587da1b84/test_download_manager.js/clean/toolkit/components/downloads/test/unit/test_download_manager.js