started working on context tracing. Added first context trace unit test

test/unit/Rect-test.js

@@ -0,0 +1,41 @@
+suite('Rect', function(){
+  var util;
+
+  setup(function(){
+
+  });
+
+  suite('add rect to stage', function(){
+    var stage = new Kinetic.Stage({
+      container: 'container',
+      width: 578,
+      height: 200
+    });
+
+    var layer = new Kinetic.Layer();
+
+    var rect = new Kinetic.Rect({
+      x: 100,
+      y: 50,
+      width: 100,
+      height: 50,
+      fill: 'green',
+      stroke: 'blue'
+    });
+
+    layer.add(rect);
+    stage.add(layer);
+
+    test('getters', function(){
+      assert.equal(rect.getX(), 100);
+      assert.equal(rect.getY(), 50);
+
+    });
+
+    test('context trace array', function() {
+      var traceArr = layer.getContext().traceArr;
+      console.log(traceArr)
+      assert.equal(traceArr[0], 'clearRect(0,0,578,200)');
+    });
+  });
+});