Add a test for custom runtime modules

config/test.exs

@@ -93,6 +93,8 @@
 
 config :pleroma, Pleroma.ReverseProxy.Client, Pleroma.ReverseProxy.ClientMock
 
+config :pleroma, :modules, runtime_dir: "test/fixtures/modules"
+
 if File.exists?("./config/test.secret.exs") do
   import_config "test.secret.exs"
 else

lib/pleroma/application.ex

@@ -81,9 +81,11 @@ def load_custom_modules do
           raise "Invalid custom modules"
 
         {:ok, modules, _warnings} ->
-          Enum.each(modules, fn mod ->
-            IO.puts("Custom module loaded: #{inspect(mod)}")
-          end)
+          if @env != :test do
+            Enum.each(modules, fn mod ->
+              IO.puts("Custom module loaded: #{inspect(mod)}")
+            end)
+          end
 
           :ok
       end

test/fixtures/modules/runtime_module.ex

@@ -0,0 +1,9 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule RuntimeModule do
+  @moduledoc """
+  This is a dummy module to test custom runtime modules.
+  """
+end

test/runtime_test.exs

@@ -0,0 +1,11 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.RuntimeTest do
+  use ExUnit.Case, async: true
+
+  test "it loads custom runtime modules" do
+    assert Code.ensure_compiled?(RuntimeModule)
+  end
+end