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-rw-r--r--Lib/test/test_string.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/test/test_string.py b/Lib/test/test_string.py
index 1615732..c2bdfdb 100644
--- a/Lib/test/test_string.py
+++ b/Lib/test/test_string.py
@@ -37,6 +37,12 @@ class ModuleTest(unittest.TestCase):
self.assertEqual(fmt.format("-{arg!r}-", arg='test'), "-'test'-")
self.assertEqual(fmt.format("{0!s}", 'test'), 'test')
self.assertRaises(ValueError, fmt.format, "{0!h}", 'test')
+ # issue13579
+ self.assertEqual(fmt.format("{0!a}", 42), '42')
+ self.assertEqual(fmt.format("{0!a}", string.ascii_letters),
+ "'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'")
+ self.assertEqual(fmt.format("{0!a}", chr(255)), "'\\xff'")
+ self.assertEqual(fmt.format("{0!a}", chr(256)), "'\\u0100'")
def test_name_lookup(self):
fmt = string.Formatter()