Silence DeprecationWarnings in test_urllib.

Lib/test/test_urllib.py

@@ -30,6 +30,9 @@ def urlopen(url, data=None, proxies=None):
     if proxies is not None:
         opener = urllib.request.FancyURLopener(proxies=proxies)
     elif not _urlopener:
+        with support.check_warnings(
+                ('FancyURLopener style of invoking requests is deprecated.',
+                DeprecationWarning)):
             opener = urllib.request.FancyURLopener()
         _urlopener = opener
     else:
@@ -1196,7 +1199,9 @@ class URLopener_Tests(unittest.TestCase):
         class DummyURLopener(urllib.request.URLopener):
             def open_spam(self, url):
                 return url
-
+        with support.check_warnings(
+                ('DummyURLopener style of invoking requests is deprecated.',
+                DeprecationWarning)):
             self.assertEqual(DummyURLopener().open(
                 'spam://example/ /'),'//example/%20/')