figuring out testing - works pretty good so far

test/myapp/battle_net/auth_test.exs

@@ -0,0 +1,9 @@
+defmodule MyApp.BattleNet.AuthTest do
+  use MyAppWeb.ConnCase, async: true
+  import MyApp.BattleNet.Auth
+
+  test "get access token from battle net should error out" do
+    assert get_access_token("123") == {:error, "invalid_request"}
+  end
+
+end