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Issue #19087: Improve bytearray allocation in order to allow cheap popping of data at the front (slice deletion).

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This commit is contained in:
Antoine Pitrou 2013-10-05 21:12:18 +02:00
parent dcd01b4932
commit 5df8a8a1fd
5 changed files with 182 additions and 151 deletions
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9
Lib/test/test_bytes.py
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@ -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: