ring param sync :neckbeard: fix #987

test/unit/shapes/Ring-test.js

@@ -21,4 +21,33 @@ suite('Ring', function() {
       var trace = layer.getContext().getTrace();
       assert.equal(trace, 'clearRect(0,0,578,200);save();transform(1,0,0,1,289,100);beginPath();arc(0,0,50,0,6.283,false);moveTo(90,0);arc(0,0,90,6.283,0,true);closePath();fillStyle=green;fill();lineWidth=4;strokeStyle=black;stroke();restore();');
    });
+
+  // ======================================================
+  // test for https://github.com/ericdrowell/KineticJS/issues/987
+  test('ring attrs sync', function() {
+      var stage = addStage();
+      var layer = new Kinetic.Layer();
+      var ring = new Kinetic.Ring({
+          name: 'ring',
+          x: 30,
+          y: 50,
+          width: 50,
+          height: 50,
+          innerRadius: 15,
+          outerRadius: 30,
+          fill: 'green',
+          stroke: 'black',
+          strokeWidth: 4,
+          draggable: true
+      });
+      layer.add(ring);
+      stage.add(layer);
+
+
+      var cring = ring.clone();
+      assert.equal(cring.outerRadius(), ring.outerRadius());
+
+      assert.equal(ring.attrs.width, ring.outerRadius() * 2);      
+   });
+
 });