Issue 4795 - Use modern JavaScript syntax

qunit/tests/prefs.js

-(function()
 {
   module("Preferences",
   {
     setup: function()
     {
       preparePrefs.call(this);
     },
 
     teardown: function()
     {
       restorePrefs.call(this);
     }
   });
 
   function checkPrefExists(name, expectedValue, description, assert)
   {
     let done = assert.async();
     let key = "pref:" + name;
-    chrome.storage.local.get(key, function(items)
+    chrome.storage.local.get(key, items =>
     {
       equal(key in items, expectedValue, description);
       done();
     });
   }
 
   function checkPref(name, expectedValue, description, assert)
   {
     let done = assert.async();
     let key = "pref:" + name;
-    chrome.storage.local.get(key, function(items)
+    chrome.storage.local.get(key, items =>
     {
       deepEqual(items[key], expectedValue, description);
       done();
     });
   }
 
-  test("Numerical pref", function(assert)
+  test("Numerical pref", assert =>
   {
     Prefs.patternsbackups = 5;
     equal(Prefs.patternsbackups, 5, "Prefs object returns the correct value after setting pref to default value");
     checkPrefExists("patternsbackups", false, "User-defined pref has been removed", assert);
     Prefs.patternsbackups = 12;
     equal(Prefs.patternsbackups, 12, "Prefs object returns the correct value after setting pref to non-default value");
     checkPrefExists("patternsbackups", true, "User-defined pref has been created", assert);
     checkPref("patternsbackups", 12, "Value has been written", assert);
   });
 
-  test("Boolean pref", function(assert)
+  test("Boolean pref", assert =>
   {
     Prefs.enabled = true;
     equal(Prefs.enabled, true, "Prefs object returns the correct value after setting pref to default value");
     checkPrefExists("enabled", false, "User-defined pref has been removed", assert);
     Prefs.enabled = false;
     equal(Prefs.enabled, false, "Prefs object returns the correct value after setting pref to non-default value");
     checkPrefExists("enabled", true, "User-defined pref has been created", assert);
     checkPref("enabled", false, "Value has been written", assert);
   });
 
-  test("String pref", function(assert)
+  test("String pref", assert =>
   {
     let defaultValue = "https://notification.adblockplus.org/notification.json";
     Prefs.notificationurl = defaultValue;
     equal(Prefs.notificationurl, defaultValue, "Prefs object returns the correct value after setting pref to default value");
     checkPrefExists("notificationurl", false, "User-defined pref has been removed", assert);
 
     let newValue = "https://notification.adblockplus.org/foo\u1234bar.json";
     Prefs.notificationurl = newValue;
     equal(Prefs.notificationurl, newValue, "Prefs object returns the correct value after setting pref to non-default value");
     checkPrefExists("notificationurl", true, "User-defined pref has been created", assert);
     checkPref("notificationurl", newValue, "Value has been written", assert);
   });
 
-  test("Object pref (complete replacement)", function(assert)
+  test("Object pref (complete replacement)", assert =>
   {
     Prefs.notificationdata = {};
     deepEqual(Prefs.notificationdata, {}, "Prefs object returns the correct value after setting pref to default value");
 
     let newValue = {foo:1, bar: "adsf\u1234"};
     Prefs.notificationdata = newValue;
     equal(Prefs.notificationdata, newValue, "Prefs object returns the correct value after setting pref to non-default value");
     checkPrefExists("notificationdata", true, "User-defined pref has been created", assert);
     checkPref("notificationdata", newValue, "Value has been written", assert);
   });
 
-  test("Property-wise modification", function(assert)
+  test("Property-wise modification", assert =>
   {
     Prefs.notificationdata = {};
 
     Prefs.notificationdata.foo = 1;
     Prefs.notificationdata.bar = 2;
     Prefs.notificationdata = JSON.parse(JSON.stringify(Prefs.notificationdata));
     deepEqual(Prefs.notificationdata, {foo:1, bar: 2}, "Prefs object returns the correct value after setting pref to non-default value");
     checkPrefExists("notificationdata", true, "User-defined pref has been created", assert);
     checkPref("notificationdata", {foo:1, bar: 2}, "Value has been written", assert);
 
     delete Prefs.notificationdata.foo;
     delete Prefs.notificationdata.bar;
     Prefs.notificationdata = JSON.parse(JSON.stringify(Prefs.notificationdata));
     deepEqual(Prefs.notificationdata, {}, "Prefs object returns the correct value after setting pref to default value");
   });
-})();
+}