diff options
Diffstat (limited to 'Lib/test/test_future.py')
| -rw-r--r-- | Lib/test/test_future.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Lib/test/test_future.py b/Lib/test/test_future.py index fdca2312fa..56b7ac6865 100644 --- a/Lib/test/test_future.py +++ b/Lib/test/test_future.py @@ -1,5 +1,7 @@ # Test various flavors of legal and illegal future statements +import __future__ +import ast import unittest from test import support from textwrap import dedent @@ -75,6 +77,21 @@ class FutureTest(unittest.TestCase): from test import badsyntax_future10 self.check_syntax_error(cm.exception, "badsyntax_future10", 3) + def test_ensure_flags_dont_clash(self): + # bpo-39562: test that future flags and compiler flags doesn't clash + + # obtain future flags (CO_FUTURE_***) from the __future__ module + flags = { + f"CO_FUTURE_{future.upper()}": getattr(__future__, future).compiler_flag + for future in __future__.all_feature_names + } + # obtain some of the exported compiler flags (PyCF_***) from the ast module + flags |= { + flag: getattr(ast, flag) + for flag in dir(ast) if flag.startswith("PyCF_") + } + self.assertCountEqual(set(flags.values()), flags.values()) + def test_parserhack(self): # test that the parser.c::future_hack function works as expected # Note: although this test must pass, it's not testing the original |