diff options
Diffstat (limited to 'Lib/test/test_fcntl.py')
| -rw-r--r-- | Lib/test/test_fcntl.py | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/Lib/test/test_fcntl.py b/Lib/test/test_fcntl.py index 8d6e9ff788..83ee7a5b0d 100644 --- a/Lib/test/test_fcntl.py +++ b/Lib/test/test_fcntl.py @@ -190,17 +190,24 @@ class TestFcntl(unittest.TestCase): res = fcntl.fcntl(self.f.fileno(), fcntl.F_GETPATH, bytes(len(expected))) self.assertEqual(expected, res) - @unittest.skipIf(not (hasattr(fcntl, "F_SETPIPE_SZ") and hasattr(fcntl, "F_GETPIPE_SZ")), - "F_SETPIPE_SZ and F_GETPIPE_SZ are not available on all unix platforms.") + @unittest.skipUnless( + hasattr(fcntl, "F_SETPIPE_SZ") and hasattr(fcntl, "F_GETPIPE_SZ"), + "F_SETPIPE_SZ and F_GETPIPE_SZ are not available on all platforms.") def test_fcntl_f_pipesize(self): test_pipe_r, test_pipe_w = os.pipe() - # Get the default pipesize with F_GETPIPE_SZ - pipesize_default = fcntl.fcntl(test_pipe_w, fcntl.F_GETPIPE_SZ) - # Multiply the default with 2 to get a new value. - fcntl.fcntl(test_pipe_w, fcntl.F_SETPIPE_SZ, pipesize_default * 2) - self.assertEqual(fcntl.fcntl(test_pipe_w, fcntl.F_GETPIPE_SZ), pipesize_default * 2) - os.close(test_pipe_r) - os.close(test_pipe_w) + try: + # Get the default pipesize with F_GETPIPE_SZ + pipesize_default = fcntl.fcntl(test_pipe_w, fcntl.F_GETPIPE_SZ) + pipesize = pipesize_default // 2 # A new value to detect change. + if pipesize < 512: # the POSIX minimum + raise unittest.SkitTest( + 'default pipesize too small to perform test.') + fcntl.fcntl(test_pipe_w, fcntl.F_SETPIPE_SZ, pipesize) + self.assertEqual(fcntl.fcntl(test_pipe_w, fcntl.F_GETPIPE_SZ), + pipesize) + finally: + os.close(test_pipe_r) + os.close(test_pipe_w) def test_main(): |