LocalStack

Testing

AWS SQS and SNS Testing: LocalStack, Mocking, and End-to-End Async Flows

AWS SQS and SNS are everywhere in serverless and microservice architectures. They're also surprisingly easy to test badly. This guide covers the three layers of SQS/SNS testing: unit tests with SDK mocks, integration tests with LocalStack, and end-to-end tests for complete async flows. The Three

Testing

LocalStack Integration Testing: Full SQS + SNS + Lambda Stack Setup

moto is great for unit tests but stops at service boundaries. When you need SQS triggering Lambda, SNS fan-out to multiple SQS queues, or Lambda updating DynamoDB — you need LocalStack. This guide sets up a full LocalStack integration test environment with Docker Compose, pytest fixtures, and reusable infrastructure helpers.