diff options
Diffstat (limited to 'Lib/test/test_posix.py')
| -rw-r--r-- | Lib/test/test_posix.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py index 9d9802bb7e..e9103cd880 100644 --- a/Lib/test/test_posix.py +++ b/Lib/test/test_posix.py @@ -478,6 +478,31 @@ class PosixTester(unittest.TestCase): os.close(reader) os.close(writer) + @unittest.skipUnless(hasattr(os, 'pipe2'), "test needs os.pipe2()") + def test_pipe2(self): + self.assertRaises(TypeError, os.pipe2, 'DEADBEEF') + self.assertRaises(TypeError, os.pipe2, 0, 0) + + # try calling without flag, like os.pipe() + r, w = os.pipe2() + os.close(r) + os.close(w) + + # test flags + r, w = os.pipe2(os.O_CLOEXEC|os.O_NONBLOCK) + self.addCleanup(os.close, r) + self.addCleanup(os.close, w) + self.assertTrue(fcntl.fcntl(r, fcntl.F_GETFD) & fcntl.FD_CLOEXEC) + self.assertTrue(fcntl.fcntl(w, fcntl.F_GETFD) & fcntl.FD_CLOEXEC) + # try reading from an empty pipe: this should fail, not block + self.assertRaises(OSError, os.read, r, 1) + # try a write big enough to fill-up the pipe: this should either + # fail or perform a partial write, not block + try: + os.write(w, b'x' * support.PIPE_MAX_SIZE) + except OSError: + pass + def test_utime(self): if hasattr(posix, 'utime'): now = time.time() |