[Timelines] Test metadata columns in CSV Export

...and additionally refactor to run in a test environment
(don't use Array.prototype.find)

platform/features/timeline/src/actions/MetadataColumn.js

@@ -34,11 +34,11 @@ define([], function () {
 
     MetadataColumn.prototype.value = function (domainObject) {
         var properties = domainObject.useCapability('metadata'),
-            name = this.propertyName,
-            property = properties.find(function (p) {
-                return p.name === name;
-            });
-        return property ? property.value : "";
+            name = this.propertyName;
+        return properties.reduce(function (value, property) {
+            return property.name === name ?
+                property.value : value;
+        }, "");
     };
 
     return MetadataColumn;

platform/features/timeline/test/actions/MetadataColumnSpec.js

@@ -0,0 +1,76 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2009-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web 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 Web 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.
+ *****************************************************************************/
+/*global define,describe,it,expect,beforeEach,waitsFor,jasmine,window,afterEach*/
+
+define(
+    ['../../src/actions/MetadataColumn'],
+    function (MetadataColumn) {
+        describe("MetadataColumn", function () {
+            var testName,
+                column;
+
+            beforeEach(function () {
+                testName = 'Foo';
+                column = new MetadataColumn(testName);
+            });
+
+            it("reports its property name", function () {
+                expect(column.name()).toEqual(testName);
+            });
+
+            describe("value", function () {
+                var mockDomainObject,
+                    testMetadata,
+                    testIndex;
+
+                beforeEach(function () {
+                    mockDomainObject = jasmine.createSpyObj(
+                        'domainObject',
+                        [ 'getId', 'getModel', 'getCapability', 'useCapability' ]
+                    );
+                    testMetadata = [
+                        { name: "Something else", value: 123 },
+                        { value: 456 },
+                        { name: "And something else", value: 789 }
+                    ];
+                    testIndex = 1;
+                    testMetadata[testIndex].name = testName;
+
+                    mockDomainObject.useCapability.andCallFake(function (c) {
+                        return (c === 'metadata') && testMetadata;
+                    });
+                });
+
+                it("returns a corresponding value", function () {
+                    expect(column.value(mockDomainObject))
+                        .toEqual(testMetadata[testIndex].value);
+                });
+
+                it("returns nothing when no such property is present", function () {
+                    testMetadata[testIndex].name = "Not " + testName;
+                    expect(column.value(mockDomainObject)).toEqual("");
+                });
+            });
+
+        });
+    }
+);