Fix test_gettextutils on Python 3

On Python 3, str(obj) calls obj.__str__(), not obj.__unicode__().

The test does not pass with nosetests, LogLevelTranslationsTest fails with an
AttributeError (self.level is missing), because nosetests doesn't play well
with test scenarios.

Change-Id: I78ae106e336480d9995ac4394197ea45b8ef9b07

3 files changed, 23 insertions, 9 deletions

diff --git a/openstack/common/gettextutils.py b/openstack/common/gettextutils.py
index b77087d..7983fb1 100644
--- a/openstack/common/gettextutils.py
+++ b/openstack/common/gettextutils.py
@@ -274,13 +274,14 @@ class Message(six.text_type):
     def __radd__(self, other):
         return self.__add__(other)
 
-    def __str__(self):
-        # NOTE(luisg): Logging in python 2.6 tries to str() log records,
-        # and it expects specifically a UnicodeError in order to proceed.
-        msg = _('Message objects do not support str() because they may '
-                'contain non-ascii characters. '
-                'Please use unicode() or translate() instead.')
-        raise UnicodeError(msg)
+    if six.PY2:
+        def __str__(self):
+            # NOTE(luisg): Logging in python 2.6 tries to str() log records,
+            # and it expects specifically a UnicodeError in order to proceed.
+            msg = _('Message objects do not support str() because they may '
+                    'contain non-ascii characters. '
+                    'Please use unicode() or translate() instead.')
+            raise UnicodeError(msg)
 
 
 def get_available_languages(domain):
diff --git a/tests/unit/fakes.py b/tests/unit/fakes.py
index 9c2e663..eab0d88 100644
--- a/tests/unit/fakes.py
+++ b/tests/unit/fakes.py
@@ -43,6 +43,11 @@ class FakeTranslations(gettext.GNUTranslations):
     def __init__(self, translations):
         self.translations = translations
 
+    # used by Python 3
+    def gettext(self, msgid):
+        return self.translations.get(msgid, msgid)
+
+    # used by Python 2
     def ugettext(self, msgid):
         return self.translations.get(msgid, msgid)
 
diff --git a/tests/unit/test_gettext.py b/tests/unit/test_gettext.py
index 5d285f5..61b6226 100644
--- a/tests/unit/test_gettext.py
+++ b/tests/unit/test_gettext.py
@@ -20,6 +20,7 @@ import logging
 from babel import localedata
 import mock
 import six
+import testtools
 
 from openstack.common.fixture import moxstubout
 from openstack.common import gettextutils
@@ -420,6 +421,7 @@ class MessageTestCase(test.BaseTestCase):
         test_me = lambda: SomeObject('test') + self.message(msgid)
         self.assertRaises(TypeError, test_me)
 
+    @testtools.skipIf(six.PY3, 'test specific to Python 2')
     def test_str_disabled(self):
         msgid = "A message"
         test_me = lambda: str(self.message(msgid))
@@ -796,6 +798,8 @@ class SomeObject(object):
 
     def __unicode__(self):
         return self.message
+    # alias for Python 3
+    __str__ = __unicode__
 
 
 class NoDeepCopyObject(object):
@@ -803,8 +807,12 @@ class NoDeepCopyObject(object):
     def __init__(self, value):
         self.value = value
 
-    def __unicode__(self):
-        return unicode(self.value)
+    if six.PY3:
+        def __str__(self):
+            return str(self.value)
+    else:
+        def __unicode__(self):
+            return unicode(self.value)
 
     def __deepcopy__(self, memo):
         raise TypeError('Deep Copy not supported')