Upstash

Testing

QStash and Upstash Queue Testing: Message Delivery, Deduplication, and Delays

QStash and Upstash Queue are serverless message queue services built on Redis. QStash delivers HTTP callbacks with at-least-once semantics, deduplication, scheduling, and retry logic. Upstash Queue provides FIFO queues with consumer groups. Testing these systems requires understanding their delivery guarantees and designing tests that verify your message handlers