| 664 | |
| 665 | def testTruncateOnWindows(self): |
| 666 | def bug801631(): |
| 667 | # SF bug <https://bugs.python.org/issue801631> |
| 668 | # "file.truncate fault on windows" |
| 669 | f = self.FileIO(TESTFN, 'w') |
| 670 | f.write(bytes(range(11))) |
| 671 | f.close() |
| 672 | |
| 673 | f = self.FileIO(TESTFN,'r+') |
| 674 | data = f.read(5) |
| 675 | if data != bytes(range(5)): |
| 676 | self.fail("Read on file opened for update failed %r" % data) |
| 677 | if f.tell() != 5: |
| 678 | self.fail("File pos after read wrong %d" % f.tell()) |
| 679 | |
| 680 | f.truncate() |
| 681 | if f.tell() != 5: |
| 682 | self.fail("File pos after ftruncate wrong %d" % f.tell()) |
| 683 | |
| 684 | f.close() |
| 685 | size = os.path.getsize(TESTFN) |
| 686 | if size != 5: |
| 687 | self.fail("File size after ftruncate wrong %d" % size) |
| 688 | |
| 689 | try: |
| 690 | bug801631() |