Skip IPv6 tests if IPv6 is not supported.

Change-Id: I8aac6b0bc675a223213348324ac8305907eb0028

keystone/test.py

@@ -16,12 +16,14 @@
 
 import datetime
 import os
+import socket
 import subprocess
 import sys
 import time
 
 import eventlet
 import mox
+import nose.exc
 from paste import deploy
 import stubout
 import unittest2 as unittest
@@ -302,3 +304,15 @@ class TestCase(NoModule, unittest.TestCase):
         :param delta: Maximum allowable time delta, defined in seconds.
         """
         self.assertAlmostEqual(a, b, delta=datetime.timedelta(seconds=delta))
+
+    @staticmethod
+    def skip_if_no_ipv6():
+        try:
+            s = socket.socket(socket.AF_INET6)
+        except socket.error as e:
+            if e.errno == errno.EAFNOSUPPORT:
+                raise nose.exc.SkipTest("IPv6 is not enabled in the system")
+            else:
+                raise
+        else:
+            s.close()

tests/test_ipv6.py

@@ -27,6 +27,10 @@ CONF = config.CONF
 
 
 class IPv6TestCase(test.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.skip_if_no_ipv6()
+
     def setUp(self):
         super(IPv6TestCase, self).setUp()
         self.load_backends()

tests/test_ssl.py

@@ -85,6 +85,7 @@ class SSLTestCase(test.TestCase):
         """
         Make sure both public and admin API work with 1-way ipv6 & SSL.
         """
+        self.skip_if_no_ipv6()
         self.public_server = self.serveapp('keystone', name='main',
                                            cert=CERT, key=KEY, ca=CA,
                                            host="::1", port=0)
@@ -107,6 +108,7 @@ class SSLTestCase(test.TestCase):
         Make sure both public and admin API work with 2-way ipv6 & SSL.
         Requires client certificate.
         """
+        self.skip_if_no_ipv6()
         self.public_server = self.serveapp(
             'keystone', name='main', cert=CERT,
             key=KEY, ca=CA, cert_required=True,