migrated Canvas, DragAndDrop, Global, and Tween tests to mocha

test/unit/Canvas-test.js

@@ -0,0 +1,39 @@
+suite('Canvas', function() {
+    // ======================================================
+    test('pixel ratio', function() {
+        var stage = addStage();
+
+        var layer = new Kinetic.Layer();
+
+        var circle = new Kinetic.Circle({
+            x: 578/2,
+            y: 100,
+            radius: 70,
+            fill: 'green',
+            stroke: 'blue',
+            strokeWidth: 4
+        });
+
+        layer.add(circle);
+        stage.add(layer);
+
+
+        stage.setWidth(578/2);
+        stage.setHeight(100);
+
+        stage.draw();
+
+        layer.getCanvas().setPixelRatio(1);
+        assert.equal(layer.getCanvas().getPixelRatio(), 1);
+        assert.equal(layer.getCanvas().width, 289);
+        assert.equal(layer.getCanvas().height, 100);
+
+        layer.getCanvas().setPixelRatio(2);
+        assert.equal(layer.getCanvas().getPixelRatio(), 2);
+        assert.equal(layer.getCanvas().width, 578);
+        assert.equal(layer.getCanvas().height, 200);
+
+        layer.draw();
+
+    });
+});