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Issue #4604: Some objects of the I/O library could still be used after

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having been closed (for instance, a read() call could return some
previously buffered data). Patch by Dmitry Vasiliev.
This commit is contained in:
Antoine Pitrou 2009-01-09 19:54:29 +00:00
parent e7bd868429
commit 8043cf868c
3 changed files with 81 additions and 36 deletions
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39
Lib/test/test_io.py
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@ -1324,6 +1324,45 @@ class MiscIOTest(unittest.TestCase):
f.close()
g.close()
def test_io_after_close(self):
for kwargs in [
{"mode": "w"},
{"mode": "wb"},
{"mode": "w", "buffering": 1},
{"mode": "w", "buffering": 2},
{"mode": "wb", "buffering": 0},
{"mode": "r"},
{"mode": "rb"},
{"mode": "r", "buffering": 1},
{"mode": "r", "buffering": 2},
{"mode": "rb", "buffering": 0},
{"mode": "w+"},
{"mode": "w+b"},
{"mode": "w+", "buffering": 1},
{"mode": "w+", "buffering": 2},
{"mode": "w+b", "buffering": 0},
]:
f = io.open(support.TESTFN, **kwargs)
f.close()
self.assertRaises(ValueError, f.flush)
self.assertRaises(ValueError, f.fileno)
self.assertRaises(ValueError, f.isatty)
self.assertRaises(ValueError, f.__iter__)
if hasattr(f, "peek"):
self.assertRaises(ValueError, f.peek, 1)
self.assertRaises(ValueError, f.read)
if hasattr(f, "read1"):
self.assertRaises(ValueError, f.read1, 1024)
if hasattr(f, "readinto"):
self.assertRaises(ValueError, f.readinto, bytearray(1024))
self.assertRaises(ValueError, f.readline)
self.assertRaises(ValueError, f.readlines)
self.assertRaises(ValueError, f.seek, 0)
self.assertRaises(ValueError, f.tell)
self.assertRaises(ValueError, f.truncate)
self.assertRaises(ValueError, f.write, "")
self.assertRaises(ValueError, f.writelines, [])
def test_main():
support.run_unittest(IOTest, BytesIOTest, StringIOTest,