import pytest
from dynalab_core import Core
from dynalab_core.config import CoreConfig
from dynalab_core.errors import CoreStateMismatchError
from test.common import find_available_port


def test_core_cannot_start_twice() -> None:
    port = find_available_port(8765)
    core = Core(CoreConfig(port=port))

    core.start()

    try:
        with pytest.raises(CoreStateMismatchError):
            core.start()
    finally:
        core.stop()