Merged revisions 68835 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
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.
........
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 489e560..6265258 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -233,6 +233,17 @@
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):