import 0x0.BytearrayUtil;

main() {
    let a1: bytearray;
    let b1: bytearray;
    let o1: bytearray;
    let expected_o1: bytearray;

    let a2: bytearray;
    let b2: bytearray;
    let o2: bytearray;
    let expected_o2: bytearray;

    let a3: bytearray;
    let b3: bytearray;
    let o3: bytearray;
    let expected_o3: bytearray;

    a1 = b"6162";
    b1 = b"bac1ac";
    expected_o1 = b"6162bac1ac";

    o1 = BytearrayUtil.bytearray_concat(move(a1), move(b1));
    assert(move(o1) == move(expected_o1), 42);

    a2 = b"";
    b2 = b"bac1ac";
    expected_o2 = b"bac1ac";

    o2 = BytearrayUtil.bytearray_concat(move(a2), move(b2));
    assert(move(o2) == move(expected_o2), 42);

    a3 = b"deadbeef";
    b3 = b"";
    expected_o3 = b"deadbeef";

    o3 = BytearrayUtil.bytearray_concat(move(a3), move(b3));
    assert(move(o3) == move(expected_o3), 42);

    return;
}