Python Microservices Development

Mocking Celery

If you are building tests for Celery workers, the simplest way to run your tests is to use a real Redis server. A Redis server is straightforward to run on any platform. Even Travis-CI will let you run one. So, instead of adding a lot of work to mock all the interactions, your Flask code will have with Redis to send some jobs to workers, and post them for real.

Using a real broker means that you can run your Celery worker in your test, just to validate that the app sent the proper job payloads. Celery provides a pytest test fixture that will run for you in a separate thread and shut it down once the test is over.

This is done by implementing a few fixtures to configure Celery to use Redis and to point your tests's tasks. The ...