Revert "Revert "Async root registration""

src/api/objects/test/RootObjectProviderSpec.js

@@ -0,0 +1,59 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2016, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is 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.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+define([
+    '../RootObjectProvider'
+], function (
+    RootObjectProvider
+) {
+    describe('RootObjectProvider', function () {
+        var rootRegistry,
+            rootObjectProvider;
+
+        function done() {
+            var isDone = false;
+            waitsFor(function () {
+                return isDone;
+            });
+            return function () {
+                isDone = true;
+            };
+        }
+
+        beforeEach(function () {
+            rootRegistry = jasmine.createSpyObj('rootRegistry', ['getRoots']);
+            rootRegistry.getRoots.andReturn(Promise.resolve(['some root']));
+            rootObjectProvider = new RootObjectProvider(rootRegistry);
+        });
+
+        it('supports fetching root', function () {
+            rootObjectProvider.get()
+                .then(function (root) {
+                    expect(root).toEqual({
+                        name: 'The root object',
+                        type: 'root',
+                        composition: ['some root']
+                    });
+                })
+                .then(done());
+        });
+    });
+});