import pytest

from app.mqtt.topic import extract_device_id


def test_extract_device_id_success() -> None:
    assert extract_device_id("terminal/device-001/raw") == "device-001"


def test_extract_device_id_rejects_invalid_topic() -> None:
    with pytest.raises(ValueError, match="terminal/\\{device_id\\}/raw"):
        extract_device_id("terminal/device-001/nmea")