Configure the default Money.Supervisor through the :mod key of applic…

…ation in mix.exs

lib/money/application.ex

@@ -5,12 +5,17 @@ defmodule Money.Application do
 
   @auto_start :auto_start_exchange_rate_service
 
-  def start(_type, _args) do
+  def start(_type, args) do
     children = [
       Money.ExchangeRates.Supervisor
     ]
 
-    opts = [strategy: :one_for_one, name: Money.Supervisor]
+    opts = if args == [] do
+      [strategy: :one_for_one, name: Money.Supervisor]
+    else
+      args
+    end
+
     supervisor = Supervisor.start_link(children, opts)
 
     if start_exchange_rate_service?() do

mix.exs

@@ -53,7 +53,7 @@ defmodule Money.Mixfile do
 
   def application do
     [
-      mod: {Money.Application, []},
+      mod: {Money.Application, [strategy: :one_for_one, name: Money.Supervisor]},
       extra_applications: [:inets, :logger]
     ]
   end

test/application_test.exs

@@ -0,0 +1,8 @@
+defmodule Money.Application.Test do
+  use ExUnit.Case
+
+  test "That our default Application supervisor has the default options" do
+    {_app, options} = Application.spec(:ex_money) |> Keyword.get(:mod)
+    assert options == [strategy: :one_for_one, name: Money.Supervisor]
+  end
+end