Add unicode output test

tests/test_unicode.py

+# -*- coding: utf-8 -*-
+import unittest
+
+import pygeoip
+from pygeoip.const import PY2, PY3
+from tests.config import CITY_DB_PATH
+
+
+class TestGeoIPCacheMethods(unittest.TestCase):
+    def setUp(self):
+        self.de_hostname = 'www.osnabrueck.de'
+        self.de_city = 'Osnabr\xfcck'.decode('latin1') if PY2 else 'Osnabrück'
+        self.gic = pygeoip.GeoIP(CITY_DB_PATH)
+
+    def testUnicodeCity(self):
+        record = self.gic.record_by_name(self.de_hostname)
+        self.assertEqual(type(record['city']), unicode if PY2 else str)
+        self.assertEqual(record['city'], self.de_city)