[Edit] Set key on represent

Set key on represent so that commit function can properly persist
configuration per object type.  Add tests to EditRepresenter

Fixes https://github.com/nasa/openmct/issues/1367

platform/commonUI/edit/test/representers/EditRepresenterSpec.js

@@ -0,0 +1,89 @@
+/*****************************************************************************
+ * 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([
+    '../../src/representers/EditRepresenter'
+], function (
+    EditRepresenter
+) {
+    describe('EditRepresenter', function () {
+        var $log,
+            $scope,
+            representer;
+
+
+        beforeEach(function () {
+            $log = jasmine.createSpyObj('$log', ['debug']);
+            $scope = {};
+            representer = new EditRepresenter($log, $scope);
+        });
+
+        it('injects a commit function in scope', function () {
+            expect($scope.commit).toEqual(jasmine.any(Function));
+        });
+
+        describe('representation', function () {
+            var domainObject,
+                representation;
+
+            beforeEach(function () {
+                domainObject = jasmine.createSpyObj('domainObject', [
+                    'getId',
+                    'getModel',
+                    'useCapability'
+                ]);
+
+                domainObject.getId.andReturn('anId');
+                domainObject.getModel.andReturn({name: 'anObject'});
+
+                representation = {
+                    key: 'someRepresentation'
+                };
+                $scope.model = {name: 'anotherName'};
+                $scope.configuration = {some: 'config'};
+                representer.represent(representation, domainObject);
+            });
+
+            it('logs a message when commiting', function () {
+                $scope.commit('Test Message');
+                expect($log.debug)
+                    .toHaveBeenCalledWith('Committing  anObject (anId): Test Message');
+            });
+
+            it('mutates the object when committing', function () {
+                $scope.commit('Test Message');
+
+                expect(domainObject.useCapability)
+                    .toHaveBeenCalledWith('mutation', jasmine.any(Function));
+
+                var mutateValue = domainObject.useCapability.calls[0].args[1]();
+
+                expect(mutateValue.configuration.someRepresentation)
+                    .toEqual({some: 'config'});
+                expect(mutateValue.name).toEqual('anotherName');
+            });
+
+        });
+
+
+    });
+});