How to use the aiodns.error.ARES_ETIMEOUT function in aiodns

def test_query_timeout(self):
        self.resolver = aiodns.DNSResolver(timeout=0.1, loop=self.loop)
        self.resolver.nameservers = ['1.2.3.4']
        f = self.resolver.query('google.com', 'A')
        try:
            self.loop.run_until_complete(f)
        except aiodns.error.DNSError as e:
            self.assertEqual(e.args[0], aiodns.error.ARES_ETIMEOUT)

async def resolve(self, domain, last_known_id=None):
        if domain.startswith('.'):
            return STSFetchResult.NONE, None
        # Cleanup domain name
        domain = domain.rstrip('.')

        # Construct name of corresponding MTA-STS DNS record for domain
        sts_txt_domain = '_mta-sts.' + domain

        # Try to fetch it
        try:
            txt_records = await asyncio.wait_for(
                self._resolver.query(sts_txt_domain, 'TXT'),
                timeout=self._timeout)
        except aiodns.error.DNSError as error:
            if error.args[0] == aiodns.error.ARES_ETIMEOUT:  # pragma: no cover pylint: disable=no-else-return,no-member
                # This branch is not covered because of aiodns bug:
                # https://github.com/saghul/aiodns/pull/64
                # It's hard to decide what to do in case of timeout
                # Probably it's better to threat this as fetch error
                # so caller probably shall report such cases.
                return STSFetchResult.FETCH_ERROR, None
            elif error.args[0] == aiodns.error.ARES_ENOTFOUND:  # pylint: disable=no-else-return,no-member
                return STSFetchResult.NONE, None
            elif error.args[0] == aiodns.error.ARES_ENODATA:  # pylint: disable=no-else-return,no-member
                return STSFetchResult.NONE, None
            else:  # pragma: no cover
                return STSFetchResult.NONE, None
        except asyncio.TimeoutError:
            return STSFetchResult.FETCH_ERROR, None

        # workaround for floating return type of pycares