Added example test using new testing API

config/test.exs

@@ -8,3 +8,6 @@ config :ueberauth_example, UeberauthExampleWeb.Endpoint,
 
 # Print only warnings and errors during test
 config :logger, level: :warn
+
+config :ueberauth, Ueberauth,
+  providers: [{:testing, {Ueberauth.Strategy.Test, []}}]

mix.exs

@@ -42,7 +42,7 @@ defmodule UeberauthExample.MixProject do
       {:jason, "~> 1.0"},
       {:plug_cowboy, "~> 2.0"},
       {:plug_crypto, "~> 1.2"},
-      {:ueberauth, "~> 0.6"},
+      {:ueberauth, path: "../ueberauth",  override: true},
       {:oauth2, "~> 2.0", override: true},
       {:ueberauth_facebook, "~> 0.8"},
       {:ueberauth_google, "~> 0.8"},

test/ueberauth_example_web/controllers/auth_controller_test.exs

@@ -0,0 +1,16 @@
+defmodule UeberauthExampleWeb.AuthControllerTest do
+  alias Ecto.UUID
+  use UeberauthExampleWeb.ConnCase
+
+  alias Ueberauth.Strategy
+
+  test "GET /", %{conn: conn} do
+    user = %Strategy.Test.UserData{
+      uid: UUID.generate()
+    }
+    conn = Strategy.Test.put_testing_user(conn, user)
+    conn = get(conn, "/auth/testing/callback")
+    assert conn.status == 302
+    assert get_flash(conn) == %{"info" => "Successfully authenticated."}
+  end
+end