Reference library

Streaming & messaging

Kafka-style pub/sub, event consumers, async pipelines, and message-driven workflows.

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Streaming & messaging medium

Mock Redis Streams XADD and XREAD in Python

A pure-Python mock of Redis streams that implements basic XADD, XREAD, and XLEN behavior for local testing without a real Redis server.

redis streams mocking
Python 
import redis
import time
import threading


class MockRedisStreams:
    def __init__(self):
        self.streams = {}

    def xadd(self, stream_name, fields):
        if stream_name not in self.streams:
            self.streams[stream_name] = []
        entry_id = f"{time.time_ns()}-{len(self.streams[stream_name])}"
…
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