Doctest that perform I/O operations

Actually my database is a very simple module that does binary parser and write it to disk using file name as identifier, I did not learn ecto yet.

I managed to make it work using the setup macro as following:

  setup do
    # Get the pids of all currently alive processes
    accounts_used_pids =
      DynamicSupervisor.which_children(Account.Cache)
      |> Stream.map(fn entry ->
        case entry do
          {_, pid, :worker, [Account.Server]} -> pid
          _ -> nil
        end
      end)
      |> Enum.filter(fn ele -> ele !== nil end)
    
    # Terminate all processes
    Enum.each(accounts_used_pids, &Process.exit(&1, :clean_up))
    
    # Reset the "database"
    File.rm_rf(Account.Database.folder_path())
    File.mkdir_p!(Account.Database.folder_path())

    :ok
  end

It might not be the optimal solution, but work for me! Thank you so much for the help!