diff options
| -rw-r--r-- | Lib/test/test_mailbox.py | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py index 720eb6f..ef64366 100644 --- a/Lib/test/test_mailbox.py +++ b/Lib/test/test_mailbox.py @@ -17,10 +17,6 @@ try: import fcntl except ImportError: pass -try: - import multiprocessing -except ImportError: - multiprocessing = None class TestBase(unittest.TestCase): @@ -999,12 +995,13 @@ class _TestMboxMMDF(TestMailbox): self._box = self._factory(self._path) @unittest.skipUnless(hasattr(os, 'fork'), "Test needs fork().") - @unittest.skipUnless(multiprocessing, "Test needs multiprocessing.") + @unittest.skipUnless(hasattr(socket, 'socketpair'), "Test needs socketpair().") def test_lock_conflict(self): # Fork off a child process that will lock the mailbox temporarily, # unlock it and exit. - ready = multiprocessing.Event() - done = multiprocessing.Event() + c, p = socket.socketpair() + self.addCleanup(c.close) + self.addCleanup(p.close) pid = os.fork() if pid == 0: @@ -1012,22 +1009,22 @@ class _TestMboxMMDF(TestMailbox): try: # lock the mailbox, and signal the parent it can proceed self._box.lock() - ready.set() + c.send(b'c') # wait until the parent is done, and unlock the mailbox - done.wait(5) + c.recv(1) self._box.unlock() finally: os._exit(0) # In the parent, wait until the child signals it locked the mailbox. - ready.wait(5) + p.recv(1) try: self.assertRaises(mailbox.ExternalClashError, self._box.lock) finally: # Signal the child it can now release the lock and exit. - done.set() + p.send(b'p') # Wait for child to exit. Locking should now succeed. exited_pid, status = os.waitpid(pid, 0) |