import json
from deltatrace.trace import LocalEvent, Metadata


def test_local_event_serialization_roundtrip():
    meta = Metadata(version="0.1", timestamp=0.0, nonce="nonce-1", source_adapter="toy-adapter")
    evt = LocalEvent(
        version="0.1",
        timestamp=0.0,
        nonce="n-1",
        source="toy",
        asset="XYZ",
        event_type="MDTick",
        payload={"price": 100.0},
        metadata=meta,
    )
    d = evt.to_dict()
    assert d["version"] == "0.1"
    assert d["payload"]["price"] == 100.0
    # ensure JSON round-trip works
    s = json.dumps(d)
    _ = json.loads(s)