[Plugins] Bring over timeline, clock plugins

WTD-1239

platform/features/timeline/test/controllers/TimelineTickControllerSpec.js

@@ -0,0 +1,67 @@
+/*global define,describe,it,expect,beforeEach,waitsFor,jasmine,window,afterEach*/
+
+define(
+    ['../../src/controllers/TimelineTickController', '../../src/TimelineFormatter'],
+    function (TimelineTickController, TimelineFormatter) {
+        'use strict';
+
+        var BILLION = 1000000000,
+            FORMATTER = new TimelineFormatter();
+
+        describe("The timeline tick controller", function () {
+            var mockToMillis,
+                controller;
+
+            function expectedTick(pixelValue) {
+                return {
+                    left: pixelValue,
+                    text: FORMATTER.format(pixelValue * 2 + BILLION)
+                };
+            }
+
+            beforeEach(function () {
+                mockToMillis = jasmine.createSpy('toMillis');
+                mockToMillis.andCallFake(function (v) {
+                    return v * 2 + BILLION;
+                });
+                controller = new TimelineTickController();
+            });
+
+            it("exposes tick marks within a requested pixel span", function () {
+                // Simple case
+                expect(controller.labels(8000, 300, 100, mockToMillis))
+                    .toEqual([8000, 8100, 8200, 8300].map(expectedTick));
+
+                // Slightly more complicated case
+                expect(controller.labels(7480, 4500, 1000, mockToMillis))
+                    .toEqual([7000, 8000, 9000, 10000, 11000, 12000].map(expectedTick));
+            });
+
+            it("does not rebuild arrays for same inputs", function () {
+                var firstValue = controller.labels(800, 300, 100, mockToMillis);
+
+                expect(controller.labels(800, 300, 100, mockToMillis))
+                    .toEqual(firstValue);
+
+                expect(controller.labels(800, 300, 100, mockToMillis))
+                    .toBe(firstValue);
+            });
+
+            it("does rebuild arrays when zoom changes", function () {
+                var firstValue = controller.labels(800, 300, 100, mockToMillis);
+
+                mockToMillis.andCallFake(function (v) {
+                    return BILLION * 2 + v;
+                });
+
+                expect(controller.labels(800, 300, 100, mockToMillis))
+                    .not.toEqual(firstValue);
+
+                expect(controller.labels(800, 300, 100, mockToMillis))
+                    .not.toBe(firstValue);
+            });
+
+        });
+
+    }
+);