diff -r 000000000000 -r 6474c204b198 browser/devtools/commandline/test/browser_gcli_pref2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/commandline/test/browser_gcli_pref2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2012, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'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-testPref2.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 helpers = require('./helpers');
+var mockSettings = require('./mockSettings');
+var settings = require('gcli/settings');
+
+exports.testPrefExec = function(options) {
+  if (options.requisition.canon.getCommand('pref') == null) {
+    assert.log('Skipping test; missing pref command.');
+    return;
+  }
+
+  if (options.isRemote) {
+    assert.log('Skipping test which assumes local settings.');
+    return;
+  }
+
+  var allowSet = settings.getSetting('allowSet');
+  var initialAllowSet = allowSet.value;
+  allowSet.value = false;
+
+  assert.is(mockSettings.tempNumber.value, 42, 'set to 42');
+
+  return helpers.audit(options, [
+    {
+      // Delegated remote types can't transfer value types so we only test for
+      // the value of 'value' when we're local
+      skipIf: options.isRemote,
+      setup: 'pref set tempNumber 4',
+      check: {
+        setting: { value: mockSettings.tempNumber },
+        args: { value: { value: 4 } }
+      }
+    },
+    {
+      skipRemainingIf: options.isNoDom,
+      setup:    'pref set tempNumber 4',
+      check: {
+        input:  'pref set tempNumber 4',
+        hints:                       '',
+        markup: 'VVVVVVVVVVVVVVVVVVVVV',
+        cursor: 21,
+        current: 'value',
+        status: 'VALID',
+        predictions: [ ],
+        unassigned: [ ],
+        args: {
+          command: { name: 'pref set' },
+          setting: {
+            arg: ' tempNumber',
+            status: 'VALID',
+            message: ''
+          },
+          value: {
+            arg: ' 4',
+            status: 'VALID',
+            message: ''
+          }
+        }
+      },
+      exec: {
+        output: [ /void your warranty/, /I promise/ ]
+      },
+      post: function() {
+        assert.is(mockSettings.tempNumber.value, 42, 'still set to 42');
+        allowSet.value = true;
+      }
+    },
+    {
+      setup:    'pref set tempNumber 4',
+      exec: {
+        output: ''
+      },
+      post: function() {
+        assert.is(mockSettings.tempNumber.value, 4, 'set to 4');
+      }
+    },
+    {
+      setup:    'pref reset tempNumber',
+      check: {
+        args: {
+          command: { name: 'pref reset' },
+          setting: { value: mockSettings.tempNumber }
+        }
+      },
+      exec: {
+        output: ''
+      },
+      post: function() {
+        assert.is(mockSettings.tempNumber.value, 42, 'reset to 42');
+
+        allowSet.value = initialAllowSet;
+      }
+    },
+    {
+      skipRemainingIf: function commandPrefListMissing() {
+        return options.requisition.canon.getCommand('pref list') == null;
+      },
+      setup:    'pref list tempNum',
+      check: {
+        args: {
+          command: { name: 'pref list' },
+          search: { value: 'tempNum' }
+        }
+      },
+      exec: {
+        output: /tempNum/
+      }
+    },
+  ]);
+};