from app.inbox_locks import InboxRunLocks


def test_inbox_run_locks_serialize_different_inboxes():
    locks = InboxRunLocks()
    first = locks.acquire("first", blocking=False)
    assert first is not None

    try:
        assert locks.acquire("second", blocking=False) is None
    finally:
        first.release()

    second = locks.acquire("second", blocking=False)
    assert second is not None
    second.release()


def test_inbox_run_locks_serialize_across_lock_instances():
    first_locks = InboxRunLocks()
    second_locks = InboxRunLocks()
    first = first_locks.acquire("first", blocking=False)
    assert first is not None

    try:
        assert second_locks.acquire("second", blocking=False) is None
    finally:
        first.release()

    second = second_locks.acquire("second", blocking=False)
    assert second is not None
    second.release()