WebGL MapRenderer inicializaiton with a test (it may fail on computers without WebGL).

test/index.html

@@ -66,6 +66,8 @@
   <script type="text/javascript" src="spec/ol/layer/TileLayer.test.js"></script>
   <script type="text/javascript" src="spec/ol/layer/XYZ.test.js"></script>
   <script type="text/javascript" src="spec/ol/Feature.test.js"></script>
+  <script type="text/javascript" src="spec/ol/renderer/WebGL.test.js"></script>
+
 
   <script type="text/javascript">
     (function() {

test/spec/ol/renderer/WebGL.test.js

@@ -0,0 +1,9 @@
+describe("ol.renderer.WebGL", function() {
+
+    it("is supported in this environment", function() {
+        // this will not always be true, but for now we expect it to be so
+        expect(ol.renderer.WebGL.isSupported()).toBe(true);
+    });
+    
+});
+