def METHOD_NAME(wait_for_record):
    load('mirror')
    # $body_bytes_sent
    set_format('$uri $body_bytes_sent')
    body = '0123456789' * 50
    client.post(url='/bbs', body=body, read_timeout=1)
    assert (
        wait_for_record(fr'^\/bbs {len(body)}$', 'access.log') is not None
    ), '$body_bytes_sent'