[Common UI] Complete remaining specs

Complete remaining specs to achieve full test coverage
for common user interface bundles being transitioned
as part of WTD-574.

platform/commonUI/browse/test/navigation/NavigationServiceSpec.js

@@ -5,10 +5,53 @@
  */
 define(
     ["../../src/navigation/NavigationService"],
-    function (NavigateAction) {
+    function (NavigationService) {
         "use strict";
 
         describe("The navigation service", function () {
+            var navigationService;
+
+            beforeEach(function () {
+                navigationService = new NavigationService();
+            });
+
+            it("stores navigation state", function () {
+                var testObject = { someKey: 42 },
+                    otherObject = { someKey: "some value" };
+                expect(navigationService.getNavigation())
+                    .toBeUndefined();
+                navigationService.setNavigation(testObject);
+                expect(navigationService.getNavigation())
+                    .toBe(testObject);
+                expect(navigationService.getNavigation())
+                    .toBe(testObject);
+                navigationService.setNavigation(otherObject);
+                expect(navigationService.getNavigation())
+                    .toBe(otherObject);
+            });
+
+            it("notifies listeners on change", function () {
+                var testObject = { someKey: 42 },
+                    callback = jasmine.createSpy("callback");
+
+                navigationService.addListener(callback);
+                expect(callback).not.toHaveBeenCalled();
+
+                navigationService.setNavigation(testObject);
+                expect(callback).toHaveBeenCalledWith(testObject);
+            });
+
+            it("stops notifying listeners after removal", function () {
+                var testObject = { someKey: 42 },
+                    callback = jasmine.createSpy("callback");
+
+                navigationService.addListener(callback);
+                navigationService.removeListener(callback);
+
+
+                navigationService.setNavigation(testObject);
+                expect(callback).not.toHaveBeenCalled();
+            });
 
         });
     }