Merge pull request #688 from lavrton/getLayerFix

Get layer fix

src/Node.js

@@ -829,7 +829,11 @@
          * @memberof Kinetic.Node.prototype
          */
         getLayer: function() {
-            return this.getParent().getLayer();
+            if (this.getParent()) {
+                return this.getParent().getLayer();
+            } else {
+                return null;
+            }
         },
         /**
          * get stage ancestor

test/unit/Node-test.js

@@ -30,7 +30,24 @@ suite('Node', function() {
 
 
     });
+    // ======================================================
+    test('get layer', function() {
+        var stage = addStage();
+        var layer = new Kinetic.Layer();
+        var circle = new Kinetic.Circle({
+            x: stage.getWidth() / 2,
+            y: stage.getHeight() / 2,
+            radius: 70,
+            fill: 'green',
+            stroke: 'black',
+            strokeWidth: 4
+        });
+        assert.equal(circle.getLayer(), null);
 
+        stage.add(layer.add(circle));
+        assert.equal(circle.getLayer(), layer);
+
+    });
     // ======================================================
     test('setAttr', function() {
         var stage = addStage();