add test_ares_timeout.py

greentest/test_ares_timeout.py

+import sys
+import gevent
+from gevent.resolver_ares import Resolver
+from gevent import socket
+print gevent.__file__
+
+address = ('127.0.0.10', 53) 
+listener = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+try:
+    listener.bind(address)
+except socket.error, ex:
+    if 'permission denied' in str(ex).lower():
+        sys.stderr.write('This test binds on port 53 and thus must be run as root.\n')
+        sys.exit(0)
+    raise
+
+
+def reader():
+    while True:
+        print listener.recvfrom(10000)
+
+gevent.spawn(reader)
+
+r = gevent.get_hub().resolver = Resolver(servers=['127.0.0.10'], timeout=0.001, tries=1)
+try:
+    result = r.gethostbyname('www.google.com')
+except socket.gaierror, ex:
+    if 'ARES_ETIMEOUT' not in str(ex):
+        raise
+else:
+    raise AssertionError('Expected timeout, got %r' % (result, ))