Discussion: Test containers or test doubles (comparison inside)

[davidbrok5]

When testing flows that start with a message from a queue, or ends by publishing a message to the queue, would you prefer testing against a real server (e.g. using test containers) or stub the MQ client (e.g. using mockito)?

I started to craft a comparison table between the two, could be nice to discusss the trade-off

[dreamtext]

Depends on the use case right?

Running your test against real servers make more sense if the code is being shipped in a live service and there are enough resources to run the containers for running tests.

It's still an automated test that runs against a more production like environment

https://www.testcontainers.org

Mocktio is great for testing code when shipping code that you might be selling or open sourcing where you don't know how the end user will use the code and you just want to make sure everything works on each release.