Fix http client for s3

config/config.exs

@@ -10,6 +10,9 @@ import Config
 config :claper,
   ecto_repos: [Claper.Repo]
 
+config :ex_aws,
+  http_client: ExAws.Request.Req
+
 # Configures the endpoint
 config :claper, ClaperWeb.Endpoint,
   render_errors: [view: ClaperWeb.ErrorView, accepts: ~w(html json), layout: false],

test/claper/tasks/converter_test.exs

@@ -6,6 +6,12 @@ defmodule Claper.Tasks.ConverterTest do
   alias Claper.Presentations.PresentationFile
   alias Claper.Tasks.Converter
 
+  test "uses the available Req client for S3 requests" do
+    assert Application.fetch_env!(:ex_aws, :http_client) == ExAws.Request.Req
+    assert Code.ensure_loaded?(ExAws.Request.Req)
+    assert function_exported?(ExAws.Request.Req, :request, 5)
+  end
+
   describe "regenerate_thumbnails/1" do
     test "uses convert when magick is unavailable" do
       storage_dir = unique_tmp_dir()