diff -r 000000000000 -r 6474c204b198 browser/devtools/commandline/test/browser_gcli_spell.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/commandline/test/browser_gcli_spell.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2009 Panagiotis Astithas
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+'use strict';
+// <INJECTED SOURCE:START>
+
+// THIS FILE IS GENERATED FROM SOURCE IN THE GCLI PROJECT
+// DO NOT EDIT IT DIRECTLY
+
+var exports = {};
+
+var TEST_URI = "data:text/html;charset=utf-8,<p id='gcli-input'>gcli-testSpell.js</p>";
+
+function test() {
+  return Task.spawn(function() {
+    let options = yield helpers.openTab(TEST_URI);
+    yield helpers.openToolbar(options);
+    gcli.addItems(mockCommands.items);
+
+    yield helpers.runTests(options, exports);
+
+    gcli.removeItems(mockCommands.items);
+    yield helpers.closeToolbar(options);
+    yield helpers.closeTab(options);
+  }).then(finish, helpers.handleError);
+}
+
+// <INJECTED SOURCE:END>
+
+// var assert = require('../testharness/assert');
+var spell = require('gcli/util/spell');
+
+exports.testSpellerSimple = function(options) {
+  var alternatives = [
+    'window', 'document', 'InstallTrigger', 'requirejs', 'require','define',
+    'console', 'location', 'constructor', 'getInterface', 'external', 'sidebar'
+  ];
+
+  assert.is(spell.correct('document', alternatives), 'document');
+  assert.is(spell.correct('documen', alternatives), 'document');
+  assert.is(spell.correct('ocument', alternatives), 'document');
+  assert.is(spell.correct('odcument', alternatives), 'document');
+
+  assert.is(spell.correct('=========', alternatives), undefined);
+};
+
+exports.testRank = function(options) {
+  var distances = spell.rank('fred', [ 'banana', 'fred', 'ed', 'red', 'FRED' ]);
+
+  assert.is(distances.length, 5, 'rank length');
+
+  assert.is(distances[0].name, 'fred', 'fred name #0');
+  assert.is(distances[1].name, 'FRED', 'FRED name #1');
+  assert.is(distances[2].name, 'red', 'red name #2');
+  assert.is(distances[3].name, 'ed', 'ed name #3');
+  assert.is(distances[4].name, 'banana', 'banana name #4');
+
+  assert.is(distances[0].dist, 0, 'fred dist 0');
+  assert.is(distances[1].dist, 4, 'FRED dist 4');
+  assert.is(distances[2].dist, 10, 'red dist 10');
+  assert.is(distances[3].dist, 20, 'ed dist 20');
+  assert.is(distances[4].dist, 100, 'banana dist 100');
+};
+
+exports.testRank2 = function(options) {
+  var distances = spell.rank('caps', [ 'CAPS', 'false' ]);
+  assert.is(JSON.stringify(distances),
+            '[{"name":"CAPS","dist":4},{"name":"false","dist":50}]',
+            'spell.rank("caps", [ "CAPS", "false" ]');
+};
+
+exports.testDistancePrefix = function(options) {
+  assert.is(spell.distancePrefix('fred', 'freddy'), 0, 'distancePrefix fred');
+  assert.is(spell.distancePrefix('FRED', 'freddy'), 4, 'distancePrefix FRED');
+};