Does `.request` match the given :ref:`message spec <message spec>`?

        >>> s = MockupDB(auto_ismaster=True)
        >>> port = s.run()
        >>> s.got(timeout=0)  # No request enqueued.
        False
        >>> from pymongo import MongoClient
        >>> client = MongoClient(s.uri)
        >>> future = go(client.db.command, 'foo')
        >>> s.got('foo')
        True
        >>> s.got(OpMsg('foo', namespace='db'))
        True
        >>> s.got(OpMsg('foo', key='value'))
        False
        >>> s.ok()
        >>> future() == {'ok': 1}
        True
        >>> s.stop()

def got(self, *args, **kwargs):
        """Does `.request` match the given :ref:`message spec <message spec>`?

        >>> s = MockupDB(auto_ismaster=True)
        >>> port = s.run()
        >>> s.got(timeout=0)  # No request enqueued.
        False
        >>> from pymongo import MongoClient
        >>> client = MongoClient(s.uri)
        >>> future = go(client.db.command, 'foo')
        >>> s.got('foo')
        True
        >>> s.got(OpMsg('foo', namespace='db'))
        True
        >>> s.got(OpMsg('foo', key='value'))
        False
        >>> s.ok()
        >>> future() == {'ok': 1}
        True
        >>> s.stop()
        """
        timeout = kwargs.pop('timeout', self._request_timeout)
        end = time.time() + timeout
        matcher = make_matcher(*args, **kwargs)

        while not self._stopped:
            try:
                # Short timeout so we notice if the server is stopped.
                request = self._request_q.peek(timeout=timeout)
            except Empty:
                if time.time() > end:
                    return False
            else:
                return matcher.matches(request)