Skip ipv6 tests on system without ipv6 support

On system without ipv6 support, CONFIG_IPV6 disabled kernel for
instance, WSGI service testcases for ipv6 would fail for "[Errno 97]
Address family not supported by protocol".

Since there is no easy way to detect actual ipv6 support,
socket.has_ipv6 not working for this case, simply skip ipv6 tests if
errno.EAFNOSUPPORT happens.

Fixes: bug 1174404

Change-Id: I9fa8653f5ccfbcb8c31c51bfda137cb58388afde

3 files changed, 22 insertions, 0 deletions

diff --git a/nova/tests/test_service.py b/nova/tests/test_service.py
index 3ca6d7bc1..055e46bfd 100644
--- a/nova/tests/test_service.py
+++ b/nova/tests/test_service.py
@@ -21,6 +21,7 @@ Unit Tests for remote procedure calls using queue
 """
 
 import sys
+import testtools
 
 import mox
 from oslo.config import cfg
@@ -31,6 +32,7 @@ from nova import exception
 from nova import manager
 from nova import service
 from nova import test
+from nova.tests import utils
 from nova import wsgi
 
 test_service_opts = [
@@ -184,6 +186,7 @@ class TestWSGIService(test.TestCase):
         self.assertNotEqual(0, test_service.port)
         test_service.stop()
 
+    @testtools.skipIf(not utils.is_ipv6_supported(), "no ipv6 support")
     def test_service_random_port_with_ipv6(self):
         CONF.set_default("test_service_listen", "::1")
         test_service = service.WSGIService("test_service")
diff --git a/nova/tests/test_wsgi.py b/nova/tests/test_wsgi.py
index cd64688a2..d1d659fe3 100644
--- a/nova/tests/test_wsgi.py
+++ b/nova/tests/test_wsgi.py
@@ -20,6 +20,7 @@
 
 import os.path
 import tempfile
+import testtools
 
 import eventlet
 import httplib2
@@ -27,6 +28,7 @@ import paste
 
 import nova.exception
 from nova import test
+from nova.tests import utils
 import nova.wsgi
 import urllib2
 import webob
@@ -101,6 +103,7 @@ class TestWSGIServer(test.TestCase):
         server.stop()
         server.wait()
 
+    @testtools.skipIf(not utils.is_ipv6_supported(), "no ipv6 support")
     def test_start_random_port_with_ipv6(self):
         server = nova.wsgi.Server("test_random_port", None,
             host="::1", port=0)
@@ -198,6 +201,7 @@ class TestWSGIServerWithSSL(test.TestCase):
         fake_ssl_server.stop()
         fake_ssl_server.wait()
 
+    @testtools.skipIf(not utils.is_ipv6_supported(), "no ipv6 support")
     def test_app_using_ipv6_and_ssl(self):
         greetings = 'Hello, World!!!'
 
@@ -210,6 +214,7 @@ class TestWSGIServerWithSSL(test.TestCase):
                                   host="::1",
                                   port=0,
                                   use_ssl=True)
+
         server.start()
 
         response = urllib2.urlopen('https://[::1]:%d/' % server.port)
diff --git a/nova/tests/utils.py b/nova/tests/utils.py
index 3d429aada..35c25b9c3 100644
--- a/nova/tests/utils.py
+++ b/nova/tests/utils.py
@@ -14,7 +14,9 @@
 #    License for the specific language governing permissions and limitations
 #
 
+import errno
 import platform
+import socket
 
 from oslo.config import cfg
 
@@ -200,3 +202,15 @@ def killer_xml_body():
         'c': '&b;' * 10,
         'd': '&c;' * 9999,
     }).strip()
+
+
+def is_ipv6_supported():
+    has_ipv6_support = True
+    try:
+        s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
+    except socket.error as e:
+        if e.errno == errno.EAFNOSUPPORT:
+            has_ipv6_support = False
+        else:
+            raise e
+    return has_ipv6_support