diff options
Diffstat (limited to 'Lib/test/test_fileio.py')
| -rw-r--r-- | Lib/test/test_fileio.py | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py index 91c5251d42..cdc3123718 100644 --- a/Lib/test/test_fileio.py +++ b/Lib/test/test_fileio.py @@ -329,6 +329,17 @@ class OtherFileTests(unittest.TestCase): f.close() self.fail("no error for invalid mode: %s" % bad_mode) + def testTruncate(self): + f = _FileIO(TESTFN, 'w') + f.write(bytes(bytearray(range(10)))) + self.assertEqual(f.tell(), 10) + f.truncate(5) + self.assertEqual(f.tell(), 10) + self.assertEqual(f.seek(0, os.SEEK_END), 5) + f.truncate(15) + self.assertEqual(f.tell(), 5) + self.assertEqual(f.seek(0, os.SEEK_END), 15) + def testTruncateOnWindows(self): def bug801631(): # SF bug <http://www.python.org/sf/801631> |