isRunning function for Sprite object

src/shapes/Sprite.js

@@ -136,6 +136,15 @@
             this.anim.stop();
             clearInterval(this.interval);
         },
+        /**
+         * determine if animation of sprite is running or not.  returns true or false
+         * @method
+         * @memberof Kinetic.Animation.prototype
+         * @returns {Boolean}
+         */
+        isRunning: function() {
+            return this.anim.isRunning();
+        },
         _updateIndex: function() {
             var index = this.frameIndex(),
                 animation = this.getAnimation(),

test/unit/shapes/Sprite-test.js

@@ -72,6 +72,48 @@ suite('Sprite', function() {
         };
         imageObj.src = 'assets/scorpion-sprite.png';
     });
+
+    test('check is sprite running', function(done){
+        var imageObj = new Image();
+        imageObj.onload = function() {
+            var stage = addStage();
+            var layer = new Kinetic.Layer();
+
+
+            var sprite = new Kinetic.Sprite({
+                x: 200,
+                y: 50,
+                image: imageObj,
+                animation: 'standing',
+                animations: {
+                    standing: [
+                        0, 0, 49, 109,
+                        52, 0, 49, 109,
+                        105, 0, 49, 109,
+                        158, 0, 49, 109,
+                        210, 0, 49, 109,
+                        262, 0, 49, 109
+                    ]
+                },
+                frameRate: 50,
+                draggable: true,
+                shadowColor: 'black',
+                shadowBlur: 3,
+                shadowOffset: {x: 3, y:1},
+                shadowOpacity: 0.3
+            });
+
+            layer.add(sprite);
+            stage.add(layer);
+            assert.equal(sprite.isRunning(), false);
+            sprite.start();
+            assert.equal(sprite.isRunning(), true);
+            sprite.stop();
+            done();
+        };
+        imageObj.src = 'assets/scorpion-sprite.png';
+    });
+
     test.skip('can change frame rate on fly', function(done){
         var imageObj = new Image();
         imageObj.onload = function() {