def _send_messages(number_range, partition=0, topic=topic, producer=kafka_producer, request=request):
        """
            messages is typically `range(0,100)`
            partition is an int
        """
        messages_and_futures = []  # [(message, produce_future),]
        for i in number_range:
            # request.node.name provides the test name (including parametrized values)
            encoded_msg = '{}-{}-{}'.format(i, request.node.name, uuid.uuid4()).encode('utf-8')
            future = kafka_producer.send(topic, value=encoded_msg, partition=partition)
            messages_and_futures.append((encoded_msg, future))
        kafka_producer.flush()
        for (msg, f) in messages_and_futures:
            assert f.succeeded()
        return [msg for (msg, f) in messages_and_futures]

            messages is typically `range(0,100)`
            partition is an int
        
test/integration/conftest.py