Add failing raster test where creating a raster without a source and then setting its size throws an error.

test/tests/Raster.js

@@ -0,0 +1,19 @@
+/*
+ * Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
+ * http://paperjs.org/
+ *
+ * Copyright (c) 2011 - 2013, Juerg Lehni & Jonathan Puckey
+ * http://lehni.org/ & http://jonathanpuckey.com/
+ *
+ * Distributed under the MIT license. See LICENSE file for details.
+ *
+ * All rights reserved.
+ */
+
+module('Raster');
+
+test('Create a raster without a source and set its size', function() {
+	var raster = new Raster();
+	raster.size = [640, 480];
+	equals(raster.size.toString(), new Size(640, 480).toString(), true);
+});

test/tests/load.js

@@ -39,6 +39,8 @@
 
 /*#*/ include('PlacedSymbol.js');
 
+/*#*/ include('Raster.js');
+
 /*#*/ include('HitResult.js');
 
 /*#*/ include('SvgImport.js');