diff -r 000000000000 -r 6474c204b198 browser/devtools/tilt/test/browser_tilt_gl05.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/tilt/test/browser_tilt_gl05.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+let isWebGLAvailable;
+
+function onWebGLFail() {
+  isWebGLAvailable = false;
+}
+
+function onWebGLSuccess() {
+  isWebGLAvailable = true;
+}
+
+function test() {
+  if (!isWebGLSupported()) {
+    info("Skipping tilt_gl05 because WebGL isn't supported on this hardware.");
+    return;
+  }
+
+  let canvas = createCanvas();
+
+  let renderer = new TiltGL.Renderer(canvas, onWebGLFail, onWebGLSuccess);
+  let gl = renderer.context;
+
+  if (!isWebGLAvailable) {
+    return;
+  }
+
+
+  let mesh = {
+    vertices: new renderer.VertexBuffer([1, 2, 3], 3),
+    indices: new renderer.IndexBuffer([1]),
+  };
+
+  ok(mesh.vertices instanceof TiltGL.VertexBuffer,
+    "The mesh vertices weren't saved at initialization.");
+  ok(mesh.indices instanceof TiltGL.IndexBuffer,
+    "The mesh indices weren't saved at initialization.");
+}