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Issue #29159: Fix regression in bytes(x) when x.__index__() raises Exception.

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This commit is contained in:
INADA Naoki 2017-01-06 17:32:01 +09:00
parent a251fb02f4
commit a634e23209
4 changed files with 41 additions and 18 deletions
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13
Lib/test/test_bytes.py
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@ -4,6 +4,7 @@ XXX This is a mess. Common tests should be unified with string_tests.py (and
the latter should be modernized).
"""
import array
import os
import re
import sys
@ -81,6 +82,18 @@ class BaseBytesTest:
self.assertRaises(ValueError, self.type2test, [Indexable(-1)])
self.assertRaises(ValueError, self.type2test, [Indexable(256)])
def test_from_buffer(self):
a = self.type2test(array.array('B', [1, 2, 3]))
self.assertEqual(a, b"\x01\x02\x03")
# http://bugs.python.org/issue29159
# Fallback when __index__ raises exception other than OverflowError
class B(bytes):
def __index__(self):
raise TypeError
self.assertEqual(self.type2test(B(b"foobar")), b"foobar")
def test_from_ssize(self):
self.assertEqual(self.type2test(0), b'')
self.assertEqual(self.type2test(1), b'\x00')