Hi,
I’m trying to test my config settings.
To do that, i use a module that load them: like this

defmodule App.SettingsBehaviour do
  @moduledoc """
  Define the behavior for accessing environment variable settings
  """
  @callback is_search_enabled :: boolean
end

defmodule App.BoundSettings do
  @options Application.get_env(:app, :options, App.Settings)

  def is_search_enabled do
    @options.is_search_enabled
  end
end

defmodule App.Settings do
  @behaviour App.SettingsBehaviour

  @impl App.SettingsBehaviour
  def is_search_enabled, do: Application.get_env(:app, :search_enabled, false)
end

config/test.exs

config :app, :options, App.OptionsMock
config :app, search_enabled: true

I have a liveview controller calling App.Settings, and when i try to mock it it returns UnexpectedCallError. Does anyone understand what could fail here?