#[test]
pub fn test_pattern() {

    let pattern = x::pattern!("E8 ( AA | CC | DD ) E8 ");
    use x::xpat::Atom::*;
    let pattern = &[Save(0), Byte(0xE8),
        Case(2), Byte(0xCC), Break(8), 
        Case(2), Byte(0xAA), Break(5), 
        Case(2), Byte(0xCC), Break(2), Nop, Byte(0xDD), Byte(0xE8)];
    let buffer: &[u8] = &[ 0xE8, 0xDD, 0xE8 ];

    let mut scanner = x::Scanner::new(buffer, pattern, ..);
    let mut saves = [0usize;8];

    assert!(scanner.next(&mut saves));
}