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Patch 1012740: cStringIO's truncate doesn't

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truncate() left the stream position unchanged, which meant the
"truncated" data didn't go away:

>>> io.write('abc')
>>> io.truncate(0)
>>> io.write('xyz')
>>> io.getvalue()
'abcxyz'

Patch by Dima Dorfman.
This commit is contained in:
Tim Peters 2004-08-21 06:55:43 +00:00
parent 7109b287cf
commit 037b3ee44e
3 changed files with 9 additions and 2 deletions
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3
Lib/test/test_StringIO.py
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@ -49,9 +49,10 @@ class TestGenericStringIO(unittest.TestCase):
f.seek(10)
f.truncate()
eq(f.getvalue(), 'abcdefghij')
f.seek(0)
f.truncate(5)
eq(f.getvalue(), 'abcde')
f.write('xyz')
eq(f.getvalue(), 'abcdexyz')
f.close()
self.assertRaises(ValueError, f.write, 'frobnitz')