diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/traits/utils.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/traits/utils.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+var ERR_CONFLICT = "Remaining conflicting property: ";
+var ERR_REQUIRED = "Missing required property: ";
+
+exports.Data = function Data(value, enumerable, configurable, writable) {
+  return ({
+    value: value,
+    enumerable: enumerable !== false,
+    configurable: configurable !== false,
+    writable: writable !== false
+  });
+};
+
+exports.Method = function Method(method, enumerable, configurable, writable) {
+  return ({
+    value: method,
+    enumerable: enumerable !== false,
+    configurable: configurable !== false,
+    writable: writable !== false
+  });
+};
+
+exports.Accessor = function Accessor(get, set, enumerable, configurable) {
+  return ({
+    get: get,
+    set: set,
+    enumerable: enumerable !== false,
+    configurable: configurable !== false
+  });
+};
+
+exports.Required = function Required(name) {
+  function required() { throw new Error(ERR_REQUIRED + name) }
+
+  return ({
+    get: required,
+    set: required,
+    required: true
+  });
+};
+
+exports.Conflict = function Conflict(name) {
+  function conflict() { throw new Error(ERR_CONFLICT + name) }
+
+  return ({
+    get: conflict,
+    set: conflict,
+    conflict: true
+  });
+};
+