fix($animate): prevent cancellation timestamp from being too far in the future

Closes angular#6748

Author: matsko

src/ngAnimate/animate.js

@@ -1109,7 +1109,7 @@ angular.module('ngAnimate', ['ng'])
 
         //but it may not need to cancel out the existing timeout
         //if the timestamp is less than the previous one
-        var futureTimestamp = Date.now() + (totalTime * 1000);
+        var futureTimestamp = Date.now() + totalTime;
         if(futureTimestamp <= closingTimestamp) {
           return;
         }

test/ngAnimate/animateSpec.js

@@ -1301,24 +1301,43 @@ describe("ngAnimate", function() {
           }));
 
           it("should intelligently cancel former timeouts and close off a series of elements a final timeout", function() {
-            var cancellations = 0;
+            var _now, currentTimestamp, cancellations = 0;
             module(function($provide) {
+              _now = Date.now;
+              currentTimestamp = _now();
+              Date.now = function() {
+                return currentTimestamp;
+              };
+
               $provide.decorator('$timeout', function($delegate) {
                 var _cancel = $delegate.cancel;
-                $delegate.cancel = function() {
-                  cancellations++;
-                  return _cancel.apply($delegate, arguments);
+                $delegate.cancel = function(timer) {
+                  if(timer) {
+                    cancellations++;
+                    return _cancel.apply($delegate, arguments);
+                  }
                 };
                 return $delegate;
               });
             })
             inject(function($animate, $rootScope, $compile, $sniffer, $timeout) {
               if (!$sniffer.transitions) return;
 
-              ss.addRule('.animate-me', '-webkit-transition:1s linear all;' +
+
+              ss.addRule('.animate-me div', '-webkit-transition:1s linear all;' +
                                                       'transition:1s linear all;');
+              
+              ss.addRule('.animate-me-longer div', '-webkit-transition:1.5s linear all;' +
+                                                       'transition:1.5s linear all;');
+
+              element = $compile(html('<div class="animate-me-longer"><div ng-repeat="item in items"></div></div>'))($rootScope);
+              $rootScope.items = [0];
+              $rootScope.$digest();
+              $animate.triggerReflow();
+
+              currentTimestamp += 2250; //1.5 * 1500 = 2250
 
-              element = $compile(html('<div><div class="animate-me" ng-repeat="item in items"></div></div>'))($rootScope);
+              element[0].className = 'animate-me';
 
               $rootScope.items = [1,2,3,4,5,6,7,8,9,10];
               var totalOperations = $rootScope.items.length;
@@ -1327,9 +1346,11 @@ describe("ngAnimate", function() {
 
               $rootScope.items = [0];
               $animate.triggerReflow();
+
+              currentTimestamp += 1500; //1.5 * 1000 = 1500
               $timeout.flush(1500);
 
-              expect(cancellations).toBeLessThan(totalOperations);
+              expect(cancellations).toBe(1);
               expect(element.children().length).toBe(10);
               cancellations = 0;
 
@@ -1339,7 +1360,9 @@ describe("ngAnimate", function() {
               $animate.triggerReflow();
               $timeout.flush(1500);
               expect(element.children().length).toBe(1);
-              expect(cancellations).toBeLessThan(totalOperations);
+              expect(cancellations).toBe(1);
+
+              Date.now = _now;
             });
           });