I have a simple
GenServer that performs some initialisation on start. That initialisation process involves making some calls to an HTTP API. I have delegated the HTTP communications to a lower level module, which I then mock using Mox. All well and good.
The GenServer is in my supervision tree in a vanilla sort of way so it gets started every time I run
mix test. That would be fine except the GenServer starts making calls to my mock before I’ve had a chance to specify what the response should be, and mox raises a
So my question is; what’s the most idiomatic way of testing this? Options I’ve considered:
- Preventing applications from being manually started by using
mix test --no-startand then manually starting the pieces I need. This is fine but the auto-start behaviour is working nicely elsewhere so would add more work.
- Selectively changing which processes are started depending on environment. Again this works fine.
Something tells me there is a better way. Thanks for any help!