Unset COLUMNS for test_argparse (and restore afterwards) (issue 9553)
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index f01c65f..08dd91b 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -26,6 +26,13 @@
print(obj2)
super(TestCase, self).assertEqual(obj1, obj2)
+ def setUp(self):
+ # The tests assume that line wrapping occurs at 80 columns, but this
+ # behaviour can be overridden by setting the COLUMNS environment
+ # variable. To ensure that this assumption is true, unset COLUMNS.
+ env = support.EnvironmentVarGuard()
+ env.unset("COLUMNS")
+ self.addCleanup(env.__exit__)
class TempDirMixin(object):
@@ -1715,6 +1722,7 @@
return parser
def setUp(self):
+ super().setUp()
self.parser = self._get_parser()
self.command_help_parser = self._get_parser(subparser_help=True)
@@ -1942,6 +1950,7 @@
self.assertRaises(ArgumentParserError, *args, **kwargs)
def setUp(self):
+ super().setUp()
self.wxyz_parent = ErrorRaisingArgumentParser(add_help=False)
self.wxyz_parent.add_argument('--w')
x_group = self.wxyz_parent.add_argument_group('x')