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Issue #23099: Closing io.BytesIO with exported buffer is rejected now to

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prevent corrupting exported buffer.
This commit is contained in:
Serhiy Storchaka 2015-02-03 02:00:18 +02:00
parent b5e8e57555
commit c057c3859c
5 changed files with 23 additions and 7 deletions
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7
Lib/test/test_memoryio.py
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@ -398,14 +398,19 @@ class BytesIOMixin:
# raises a BufferError.
self.assertRaises(BufferError, memio.write, b'x' * 100)
self.assertRaises(BufferError, memio.truncate)
self.assertRaises(BufferError, memio.close)
self.assertFalse(memio.closed)
# Mutating the buffer updates the BytesIO
buf[3:6] = b"abc"
self.assertEqual(bytes(buf), b"123abc7890")
self.assertEqual(memio.getvalue(), b"123abc7890")
# After the buffer gets released, we can resize the BytesIO again
# After the buffer gets released, we can resize and close the BytesIO
# again
del buf
support.gc_collect()
memio.truncate()
memio.close()
self.assertRaises(ValueError, memio.getbuffer)
class PyBytesIOTest(MemoryTestMixin, MemorySeekTestMixin,