public void CanDrawSquare()
{
VertexBuffer vbuf = new VertexBuffer(Test_VertexBuffer.CUBE_VERTICES.Length);
vbuf.CopyData(Test_VertexBuffer.CUBE_VERTICES);
IndexBuffer ibuf = new IndexBuffer(Test_IndexBuffer.CUBE_INDICES.Length);
ibuf.CopyData(Test_IndexBuffer.CUBE_INDICES);
VertexFormat vfmt = new VertexFormat(Test_VertexFormat.CUBE_ATTRIBUTES);
GraphicsSystem.BeginFrame();
GraphicsSystem.Clear(Color.Black);
GraphicsSystem.Draw(vbuf, vfmt, ibuf);
GraphicsSystem.EndFrame();
GraphicsSystem.Swap();
Bitmap image = _wnd.GrabScreen();
Assert.IsTrue(0 == image.GetPixel(30,30).R, "Square is larger than expected");
Assert.IsTrue(0 < image.GetPixel(48,48).R, "Square was not rendered");
}