TEST ()
{
GeglBuffer *buffer, *buffer2;
GeglRectangle bound = {0, 0, 20, 20};
test_start ();
buffer = gegl_buffer_new (&bound, babl_format ("Y float"));
vgrad (buffer);
buffer2 = gegl_buffer_dup (buffer);
g_object_unref (buffer2);
print_buffer (buffer);
g_object_unref (buffer);
test_end ();
}