add oauth2/oidc lib

library/oauth2/test/OAuth2/ResponseTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace OAuth2;
+
+class ResponseTest extends \PHPUnit_Framework_TestCase
+{
+    public function testRenderAsXml()
+    {
+        $response = new Response(array(
+            'foo' => 'bar',
+            'halland' => 'oates',
+        ));
+
+        $string = $response->getResponseBody('xml');
+        $this->assertContains('<response><foo>bar</foo><halland>oates</halland></response>', $string);
+    }
+}