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
@@ -1005,8 +1009,8 @@
                 x = config.x || 0,
                 y = config.y || 0,
                 canvas = new Kinetic.SceneCanvas({
-                    width: config.width || stage.getWidth(),
+                    width: this.getWidth() || config.width || (stage ? stage.getWidth() : 0),
-                    height: config.height || stage.getHeight(),
+                    height: this.getHeight() || config.height || (stage ? stage.getHeight() : 0),
                     pixelRatio: 1
                 }),
                 context = canvas.getContext();

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();
@@ -933,6 +950,39 @@ suite('Node', function() {
         showHit(layer);
     });
 
+    // ======================================================
+    test('node caching width minimal configuration', function(done) {
+        var stage = addStage();
+        var layer = new Kinetic.Layer();
+        stage.add(layer);
+
+        var rect = new Kinetic.Rect({
+            width : 50,
+            height : 50,
+            fill: 'green',
+            stroke: 'blue',
+            strokeWidth: 5,
+            draggable: true
+        });
+
+        rect.toImage({
+            callback: function(imageObj) {
+                assert.equal(Kinetic.Util._isElement(imageObj), true);
+                var cachedShape = new Kinetic.Image({
+                    image: imageObj,
+                    draggable: true,
+                    stroke: 'red',
+                    strokeWidth: 5
+                });
+
+                layer.add(cachedShape);
+                layer.draw();
+                done();
+            }
+        });
+
+        showHit(layer);
+    });
     // ======================================================
     test('hide group', function() {
         var stage = addStage();