add failing test for unicode headers (python 2.x only)

test_requests.py

@@ -111,6 +111,11 @@ class RequestsTestSuite(TestSetup, unittest.TestCase):
         r = get(httpbin('get') + '?test=true', params={'q': 'test'}, headers=heads)
         self.assertEqual(r.status_code, 200)
 
+    def test_session_with_unicode_headers(self):
+        heads = { u'User-Agent': u'\u30cd\u30c3\u30c8\u30ef\u30fc\u30af' }
+
+        requests.get(url=httpbin('get'), headers=heads)
+
 
     def test_user_agent_transfers(self):
         """Issue XX"""