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Issue #24731: Fixed crash on converting objects with special methods

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__bytes__, __trunc__, and __float__ returning instances of subclasses of
bytes, int, and float to subclasses of bytes, int, and float correspondingly.
This commit is contained in:
Serhiy Storchaka 2015-11-25 15:52:04 +02:00
commit f9afda57ad
8 changed files with 50 additions and 10 deletions
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11
Lib/test/test_bytes.py
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@ -779,6 +779,14 @@ def __bytes__(self):
def __index__(self):
return 42
self.assertEqual(bytes(A()), b'a')
# Issue #24731
class A:
def __bytes__(self):
return OtherBytesSubclass(b'abc')
self.assertEqual(bytes(A()), b'abc')
self.assertIs(type(bytes(A())), OtherBytesSubclass)
self.assertEqual(BytesSubclass(A()), b'abc')
self.assertIs(type(BytesSubclass(A())), BytesSubclass)
# Test PyBytes_FromFormat()
def test_from_format(self):
@ -1552,6 +1560,9 @@ class ByteArraySubclass(bytearray):
class BytesSubclass(bytes):
pass
class OtherBytesSubclass(bytes):
pass
class ByteArraySubclassTest(SubclassTest, unittest.TestCase):
type2test = bytearray
subclass2test = ByteArraySubclass