bpo-34215: Clarify IncompleteReadError message when "expected" is None (GH-21925)
Co-Authored-By: Tyler Bell <mrbell321@gmail.com>
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@ -34,8 +34,9 @@ class IncompleteReadError(EOFError):
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- expected: total number of expected bytes (or None if unknown)
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"""
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def __init__(self, partial, expected):
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r_expected = 'undefined' if expected is None else repr(expected)
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super().__init__(f'{len(partial)} bytes read on a total of '
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f'{expected!r} expected bytes')
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f'{r_expected} expected bytes')
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self.partial = partial
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self.expected = expected
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@ -444,12 +444,14 @@ class StreamTests(test_utils.TestCase):
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def test_readuntil_eof(self):
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stream = asyncio.StreamReader(loop=self.loop)
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stream.feed_data(b'some dataAA')
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data = b'some dataAA'
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stream.feed_data(data)
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stream.feed_eof()
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with self.assertRaises(asyncio.IncompleteReadError) as cm:
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with self.assertRaisesRegex(asyncio.IncompleteReadError,
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'undefined expected bytes') as cm:
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self.loop.run_until_complete(stream.readuntil(b'AAA'))
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self.assertEqual(cm.exception.partial, b'some dataAA')
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self.assertEqual(cm.exception.partial, data)
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self.assertIsNone(cm.exception.expected)
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self.assertEqual(b'', stream._buffer)
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@ -0,0 +1,2 @@
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Clarify the error message for :exc:`asyncio.IncompleteReadError` when
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``expected`` is ``None``.
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