use domain::value_objects::Checksum;

#[test]
fn accepts_valid_sha256() {
    let hex = "a".repeat(64);
    assert!(Checksum::new(&hex).is_ok());
}

#[test]
fn rejects_short() {
    let hex = "a".repeat(63);
    assert!(Checksum::new(&hex).is_err());
}

#[test]
fn rejects_non_hex() {
    let mut hex = "a".repeat(63);
    hex.push('g');
    assert!(Checksum::new(&hex).is_err());
}

#[test]
fn normalizes_to_lowercase() {
    let hex = "A".repeat(64);
    let cs = Checksum::new(&hex).unwrap();
    assert_eq!(cs.as_str(), "a".repeat(64));
}