let { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components; Cu.import("resource://gre/modules/Services.jsm"); let executableFile = Services.dirsvc.get("CurProcD", Ci.nsIFile); executableFile.append("xpcshell.exe"); function run_test() { let quote = '"'; // Windows' cmd processor doesn't actually use single quotes. for (let suffix of ["", " -osint", ` --blah "%PROGRAMFILES%"`]) { let cmdline = quote + executableFile.path + quote + suffix; do_print(`Testing with ${cmdline}`); let f = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFileWin); f.initWithCommandLine(cmdline); Assert.equal(f.path, executableFile.path, "Should be able to recover executable path"); } let f = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFileWin); f.initWithCommandLine("%ComSpec% -c echo 'hi'"); let cmd = Services.dirsvc.get("SysD", Ci.nsIFile); cmd.append("cmd.exe"); Assert.equal(f.path, cmd.path, "Should be able to replace env vars."); }