Fixed #16490 -- Skipped a test failure that only occurs under Python 2.6.1 (it's the old iteration-eats-exceptions problem).

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16784 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/select_for_update/tests.py

@@ -101,10 +101,11 @@ class SelectForUpdateTests(TransactionTestCase):
     # are swallowed (Python issue 1242657), so these cases return an empty
     # list, rather than raising an exception. Not a lot we can do about that,
     # unfortunately, due to the way Python handles list() calls internally.
-    # Thus, we skip this test for Python 2.6.
+    # Python 2.6.1 is the "in the wild" version affected by this, so we skip
+    # the test for that version.
     @requires_threading
     @skipUnlessDBFeature('has_select_for_update_nowait')
-    @unittest.skipIf(sys.version_info[:2] == (2, 6), "Python version is 2.6")
+    @unittest.skipIf(sys.version_info[:3] == (2, 6, 1), "Python version is 2.6.1")
     def test_nowait_raises_error_on_block(self):
         """
         If nowait is specified, we expect an error to be raised rather
@@ -124,8 +125,15 @@ class SelectForUpdateTests(TransactionTestCase):
         self.end_blocking_transaction()
         self.check_exc(status[-1])
 
+    # In Python 2.6 beta and some final releases, exceptions raised in __len__
+    # are swallowed (Python issue 1242657), so these cases return an empty
+    # list, rather than raising an exception. Not a lot we can do about that,
+    # unfortunately, due to the way Python handles list() calls internally.
+    # Python 2.6.1 is the "in the wild" version affected by this, so we skip
+    # the test for that version.
     @skipIfDBFeature('has_select_for_update_nowait')
     @skipUnlessDBFeature('has_select_for_update')
+    @unittest.skipIf(sys.version_info[:3] == (2, 6, 1), "Python version is 2.6.1")
     def test_unsupported_nowait_raises_error(self):
         """
         If a SELECT...FOR UPDATE NOWAIT is run on a database backend