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........
  r68835 | antoine.pitrou | 2009-01-21 01:45:36 +0100 (mer., 21 janv. 2009) | 6 lines

  Issue #5008: When a file is opened in append mode with the new IO library,
  do an explicit seek to the end of file (so that e.g. tell() returns the
  file size rather than 0). This is consistent with the behaviour of the
  traditional 2.x file object.
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This commit is contained in:
Antoine Pitrou 2009-01-21 00:55:13 +00:00
parent 6268cbc771
commit 08838b6acf
3 changed files with 29 additions and 0 deletions
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11
Lib/test/test_io.py
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@ -233,6 +233,17 @@ class IOTest(unittest.TestCase):
else:
self.fail("1/0 didn't raise an exception")
# issue 5008
def test_append_mode_tell(self):
with io.open(support.TESTFN, "wb") as f:
f.write(b"xxx")
with io.open(support.TESTFN, "ab", buffering=0) as f:
self.assertEqual(f.tell(), 3)
with io.open(support.TESTFN, "ab") as f:
self.assertEqual(f.tell(), 3)
with io.open(support.TESTFN, "a") as f:
self.assert_(f.tell() > 0)
def test_destructor(self):
record = []
class MyFileIO(io.FileIO):