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-rw-r--r--Lib/test/test_bytes.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index f12f911..847c7a6 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -909,6 +909,15 @@ class ByteArrayTest(BaseBytesTest, unittest.TestCase):
with self.assertRaises(ValueError):
b[3:4] = elem
+ def test_setslice_extend(self):
+ # Exercise the resizing logic (see issue #19087)
+ b = bytearray(range(100))
+ self.assertEqual(list(b), list(range(100)))
+ del b[:10]
+ self.assertEqual(list(b), list(range(10, 100)))
+ b.extend(range(100, 110))
+ self.assertEqual(list(b), list(range(10, 110)))
+
def test_extended_set_del_slice(self):
indices = (0, None, 1, 3, 19, 300, 1<<333, -1, -2, -31, -300)
for start in indices: