Class _RaceCon

tests/test_read_write_unit.py:637–644

    real_con = reader._con

    class _RaceCon:
        def execute(self, sql: str) -> object:  # noqa: PLR6301
            if sql.lstrip().upper().startswith("SELECT") and not writer._con.in_transaction:
                writer.acquire_write()  # writer slips in between the reader's BEGIN and SELECT
            return real_con.execute(sql)

        def __getattr__(self, name: str) -> object:
            return getattr(real_con, name)

    reader._con = _RaceCon()  # ty: ignore[invalid-assignment]
    with pytest.raises(Timeout):