From f70b6cbfd343ebb618ca57f07dbc60d007da170c Mon Sep 17 00:00:00 2001 From: Jesus Cea Date: Thu, 26 Apr 2012 16:39:35 +0200 Subject: Close #10142: Support for SEEK_HOLE/SEEK_DATA --- Lib/test/test_posix.py | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'Lib/test/test_posix.py') diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py index 142dddd09b..c8798a9a93 100644 --- a/Lib/test/test_posix.py +++ b/Lib/test/test_posix.py @@ -1009,6 +1009,26 @@ class PosixTester(unittest.TestCase): posix.RTLD_GLOBAL posix.RTLD_LOCAL + @unittest.skipUnless('PC_MIN_HOLE_SIZE' in os.pathconf_names, + "test needs an OS that reports file holes") + def test_fs_holes(self) : + # Even if the filesystem doesn't report holes, + # if the OS supports it the SEEK_* constants + # will be defined and will have a consistent + # behaviour: + # os.SEEK_DATA = current position + # os.SEEK_HOLE = end of file position + with open(support.TESTFN, 'r+b') as fp : + fp.write(b"hello") + fp.flush() + size = fp.tell() + fno = fp.fileno() + for i in range(size) : + self.assertEqual(i, os.lseek(fno, i, os.SEEK_DATA)) + self.assertLessEqual(size, os.lseek(fno, i, os.SEEK_HOLE)) + self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_DATA) + self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_HOLE) + class PosixGroupsTester(unittest.TestCase): def setUp(self): -- cgit v1.2.1