[Plugins] Bring over timeline, clock plugins

WTD-1239

platform/features/clock/test/services/TickerServiceSpec.js

@@ -0,0 +1,43 @@
+/*global define,describe,it,expect,beforeEach,waitsFor,jasmine,window,afterEach*/
+
+define(
+    ["../../src/services/TickerService"],
+    function (TickerService) {
+        "use strict";
+
+        var TEST_TIMESTAMP = 1433354174000;
+
+        describe("The ticker service", function () {
+            var mockTimeout,
+                mockNow,
+                mockCallback,
+                tickerService;
+
+            beforeEach(function () {
+                mockTimeout = jasmine.createSpy('$timeout');
+                mockNow = jasmine.createSpy('now');
+                mockCallback = jasmine.createSpy('callback');
+
+                mockNow.andReturn(TEST_TIMESTAMP);
+
+                tickerService = new TickerService(mockTimeout, mockNow);
+            });
+
+            it("notifies listeners of clock ticks", function () {
+                tickerService.listen(mockCallback);
+                mockNow.andReturn(TEST_TIMESTAMP + 12321);
+                mockTimeout.mostRecentCall.args[0]();
+                expect(mockCallback)
+                    .toHaveBeenCalledWith(TEST_TIMESTAMP + 12321);
+            });
+
+            it("allows listeners to unregister", function () {
+                tickerService.listen(mockCallback)(); // Unregister immediately
+                mockNow.andReturn(TEST_TIMESTAMP + 12321);
+                mockTimeout.mostRecentCall.args[0]();
+                expect(mockCallback).not
+                    .toHaveBeenCalledWith(TEST_TIMESTAMP + 12321);
+            });
+        });
+    }
+);