Hello friends, I do not think this problem of mine exists in production build ( I did not test it), but in developer mode iex -S mix.

imagine you have this module

defmodule PluginWorker do
  use Worker, concurrency: 1
  
  def perform(event: event, type: :start) do
    ....
  end
end

If I run my iex, and call it inside the function_exported? it returns true.

but when I use it like this:

  @impl true
  # The task completed successfully
  def handle_info({ref, _answer}, %{ref: ref} = state) do
 
    Process.demonitor(ref, [:flush])
    
    # HERE
    function_exported?(PluginWorker, :worker?, 0)
    |> IO.inspect(label: "=-==-=-=>") # false

    Queue.new(%{
      worker: PluginWorker,
      error: %{type: :continuously, max_try: 5, delay: 1000}
    })

    {:noreply, %{state | ref: nil}, {:continue, :start_service_restoring}}
  end

As you see it returns false my question is, how can have this builded in iex developer env and test, and the other problem is, it is a problem in production build? like release

Test mode

In test mode I am forced to call some modules in test_helper.exs file before testing, because without it inside my tests they are no be compiled before

for example:

ExUnit.start()

# Help to compile workers
MishkaInstallerTest.Support.MisWorkerOne.worker?()
WorkerTwo.worker?()
WorkerThree.worker?()
PluginWorker.worker?()

Thank you in advance