use kelvin::{Blake2b, Compound, Store, Void};
use kelvin_hamt::HAMT;

#[test]
fn root_hash() {
    let mut hamt = HAMT::<_, _, Void, Blake2b>::new();

    for i in 0..1024 {
        hamt.insert(i, i).unwrap();
    }

    // Calculating the root hash should not write anything to any store

    let root_hash = hamt.root_hash();

    let store = Store::ephemeral();

    let snap = store.persist(&mut hamt).unwrap();

    assert_eq!(&root_hash, snap.hash());

    let mut hamt_restored = store.restore(&snap).unwrap();

    let restored_root_hash = hamt_restored.root_hash();

    assert_eq!(root_hash, restored_root_hash);
}