Issue #13107: argparse and optparse no longer raises an exception when output

a help on environment with too small COLUMNS.  Based on patch by
Elazar Gershuni.

1 files changed, 54 insertions, 0 deletions

diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index c06c940..9cb15c7 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -2973,6 +2973,60 @@ class TestHelpBiggerOptionals(HelpTestCase):
         0.1
         '''
 
+class TestShortColumns(HelpTestCase):
+    '''Test extremely small number of columns.
+
+    TestCase prevents "COLUMNS" from being too small in the tests themselves,
+    but we don't want any exceptions thrown in such case. Only ugly representation.
+    '''
+    def setUp(self):
+        env = support.EnvironmentVarGuard()
+        env.set("COLUMNS", '15')
+        self.addCleanup(env.__exit__)
+
+    parser_signature            = TestHelpBiggerOptionals.parser_signature
+    argument_signatures         = TestHelpBiggerOptionals.argument_signatures
+    argument_group_signatures   = TestHelpBiggerOptionals.argument_group_signatures
+    usage = '''\
+        usage: PROG
+               [-h]
+               [-v]
+               [-x]
+               [--y Y]
+               foo
+               bar
+        '''
+    help = usage + '''\
+
+        DESCRIPTION
+
+        positional arguments:
+          foo
+            FOO HELP
+          bar
+            BAR HELP
+
+        optional arguments:
+          -h, --help
+            show this
+            help
+            message and
+            exit
+          -v, --version
+            show
+            program's
+            version
+            number and
+            exit
+          -x
+            X HELP
+          --y Y
+            Y HELP
+
+        EPILOG
+    '''
+    version                     = TestHelpBiggerOptionals.version
+
 
 class TestHelpBiggerOptionalGroups(HelpTestCase):
     """Make sure that argument help aligns when options are longer"""