[Import/Export] Adds Import and Export functionality

Added context actions for importing and exporting JSON representations of domain objects. Added FileInputService for triggering file picker and retrieving uploaded data. Also added a File Input form control for integration with MCTForms.

platform/forms/test/FileInputServiceSpec.js

@@ -0,0 +1,74 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2017, 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/FileInputService"],
+    function (FileInputService) {
+
+        describe("The FileInputService", function () {
+            var fileInputService,
+                mockInput;
+
+            beforeEach(function () {
+                fileInputService = new FileInputService();
+                mockInput = jasmine.createSpyObj('input',
+                    [
+                        'on',
+                        'trigger',
+                        'remove'
+                    ]
+                );
+                mockInput.on.andCallFake(function (event, changeHandler) {
+                    changeHandler.apply(mockInput);
+                });
+                spyOn(fileInputService, "newInput").andReturn(
+                    mockInput
+                );
+
+            });
+
+            it("can read a file", function () {
+                mockInput.files = [new File(["file content"], "file name")];
+                fileInputService.getInput().then(function (result) {
+                    expect(result.name).toBe("file name");
+                    expect(result.body).toBe("file content");
+                });
+
+                expect(mockInput.trigger).toHaveBeenCalledWith('click');
+                expect(mockInput.remove).toHaveBeenCalled();
+            });
+
+            it("catches file read errors", function () {
+                mockInput.files = ["GARBAGE"];
+                fileInputService.getInput().then(
+                    function (result) {},
+                    function (err) {
+                        expect(err).toBe("File read error");
+                    }
+                );
+
+                expect(mockInput.trigger).toHaveBeenCalledWith('click');
+                expect(mockInput.remove).toHaveBeenCalled();
+            });
+        });
+    }
+);