Hi. My project has both unit and property tests. Unit tests are using a mocking library but I don’t need my property tests to run with the mocks, so I decided to split my test env into two: test and property_test using test.exs and property_test.exs config files respectively. Finally, I’m running these tests using the commands:

$ MIX_ENV=property_test  mix test  test/property/
$ MIX_ENV=test mix test test/unit

Now, I would like to instead create custom commands to simplify things using Mix’s aliases but I don’t know how to achieve it. Like how would that look like ? I don’t know how to tell Mix which env it should execute each alias with. This is what I have so far in my mix.exs

  def cli do
    [preferred_envs: ["test.unit": :test, "test.property": :property_test]]
  end

  defp aliases() do
  [
      "test.property": ["test test/property/"],
      "test.unit": ["test test/unit"]
    ]
  end

But I’m still getting this error

** (Mix) “mix test” is running in the “property_test” environment. If you are running tests from within another command, you can either:

1. set MIX_ENV explicitly:

   MIX_ENV=test mix test.another

2. set the :preferred_envs for “def cli” in your mix.exs:

   def cli do
   [preferred_envs: [“test.another”: :test]]
   end