import json
from pathlib import Path
from bexproof.ledger import TamperProofLedger


def test_ledger_append_and_hash(tmp_path: Path):
    ledger_path = tmp_path / "ledger.log"
    ledger = TamperProofLedger(str(ledger_path))
    entry1 = {"order_id": "ORD1", "venue": "VENUE1"}
    rec1 = ledger.append(entry1)
    assert "hash" in rec1
    entry2 = {"order_id": "ORD2", "venue": "VENUE2"}
    rec2 = ledger.append(entry2)
    assert rec2["prev_hash"] == rec1["hash"]