michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/  */
michael@0: 
michael@0: function run_test() {
michael@0:   const Cc = Components.classes;
michael@0:   const Ci = Components.interfaces;
michael@0:   const Cr = Components.results;
michael@0:   const PREF_NAME = "testPref";
michael@0: 
michael@0:   var ps = Cc["@mozilla.org/preferences-service;1"]
michael@0:            .getService(Ci.nsIPrefService);
michael@0:   var prefs = ps.getDefaultBranch(null);
michael@0:   var userprefs = ps.getBranch(null);
michael@0: 
michael@0:   /* First, test to make sure we can parse a float from a string properly. */
michael@0:   prefs.setCharPref(PREF_NAME, "9.674");
michael@0:   prefs.lockPref(PREF_NAME);
michael@0:   var myFloat = 9.674;
michael@0:   var fudge = 0.001;
michael@0:   var floatPref = userprefs.getFloatPref(PREF_NAME);
michael@0:   do_check_true(myFloat+fudge >= floatPref);
michael@0:   do_check_true(myFloat-fudge <= floatPref);
michael@0: 
michael@0:   /* Now test some failure conditions. */
michael@0:   prefs.unlockPref(PREF_NAME);
michael@0:   prefs.setCharPref(PREF_NAME, "");
michael@0:   prefs.lockPref(PREF_NAME);
michael@0:   do_check_throws(function() {
michael@0:     userprefs.getFloatPref(PREF_NAME);
michael@0:   }, Cr.NS_ERROR_ILLEGAL_VALUE);
michael@0: 
michael@0:   prefs.unlockPref(PREF_NAME);
michael@0:   prefs.setCharPref(PREF_NAME, "18.0a1");
michael@0:   prefs.lockPref(PREF_NAME);
michael@0: 
michael@0:   do_check_throws(function() {
michael@0:     userprefs.getFloatPref(PREF_NAME);
michael@0:   }, Cr.NS_ERROR_ILLEGAL_VALUE);
michael@0: 
michael@0:   prefs.unlockPref(PREF_NAME);
michael@0:   prefs.setCharPref(PREF_NAME, "09.25.2012");
michael@0:   prefs.lockPref(PREF_NAME);
michael@0: 
michael@0:   do_check_throws(function() {
michael@0:     userprefs.getFloatPref(PREF_NAME);
michael@0:   }, Cr.NS_ERROR_ILLEGAL_VALUE);
michael@0: 
michael@0:   prefs.unlockPref(PREF_NAME);
michael@0:   prefs.setCharPref(PREF_NAME, "aString");
michael@0:   prefs.lockPref(PREF_NAME);
michael@0: 
michael@0:   do_check_throws(function() {
michael@0:     userprefs.getFloatPref(PREF_NAME);
michael@0:   }, Cr.NS_ERROR_ILLEGAL_VALUE);
michael@0: }