Updated test_handler.py

tests/test_handler.py

 import unittest
+import sys
 
 from handler import MixinHandler
 
@@ -17,11 +18,26 @@ class RequestMock(object):
 
 class TestMixinHandler(unittest.TestCase):
 
-    def test_get_real_client_addr(self):
+    def test_get_real_client_addr_without_nginx_config(self):
         handler = MixinHandler()
         handler.request = RequestMock()
         self.assertIsNone(handler.get_real_client_addr())
 
+    def test_get_real_client_addr_with_correct_nginx_config(self):
+        handler = MixinHandler()
+        handler.request = RequestMock()
+
+        ip = '127.0.0.1'
+        handler.request.set_ip(ip)
+        handler.request.set_port('12345')
+        self.assertEqual(handler.get_real_client_addr(), (ip, 12345))
+
+    @unittest.skipIf(sys.version_info < (3,),
+                     reason='assertLogs not supported in Python 2')
+    def test_get_real_client_addr_with_bad_nginx_config(self):
+        handler = MixinHandler()
+        handler.request = RequestMock()
+
         ip = '127.0.0.1'
         handler.request.set_ip(ip)
         with self.assertLogs() as cm:
@@ -32,6 +48,3 @@ class TestMixinHandler(unittest.TestCase):
         with self.assertLogs() as cm:
             handler.get_real_client_addr()
         self.assertEqual(cm.output, ['WARNING:root:Bad nginx configuration.'])
-
-        handler.request.set_port('12345')
-        self.assertEqual(handler.get_real_client_addr(), (ip, 12345))