Elixir ExUnit test with custom dependency environnement

Question

I have a project A, which depends on a dependency B created by me also...

when I want to launch test on A with a simple mix test, it's getting the dependecy B, compiling it and starting it in :prod environnement...

Which mean A is in :test environnement and B is in :prod env.

I would like for the tests to launch the dependency in :dev environnement (or anything else but :prod), is there a way to do that ?

Although it looks an overkill here, one might introduce their own compiler and delegate compilation of B project in the requested environment to it. That way the project B in local would always have been compiled in the same environment as A currently is. — Aleksei Matiushkin
– Aleksei Matiushkin, Commented Apr 4, 2017 at 13:52

PatNowak · Accepted Answer · 2017-04-04 12:45:58Z

1

Maybe your MIX_ENV is prod and mix test doesn't change it to test. Try explicitly:

MIX_ENV=test mix test

and for dev

MIX_ENV=dev mix test

answered Apr 4, 2017 at 12:45

PatNowak

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4 Comments

TheSquad Over a year ago

Actually, the issue is not here, I do not have MIX_ENV env variable set. However you pointed me out to my mistakes that Mix.env was used a compile time not running time.

TheSquad Over a year ago

Unfortunately I can't accept the answer as it is... edit it so you point the difference between compile time Mix.env (in :prod) and running time Mix.env, and I will :-)

Aleksei Matiushkin Over a year ago

“I do not have MIX_ENV env variable set”—you always do. If you have not set it explicitly, mix has done it for you.

TheSquad Over a year ago

@mudasobwa: what I meant is I didn't export MIX_ENV=prod... of course that mix does it for you, but I don't overcharge it...

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