'L{FilesystemLock.unlock} raises L{ValueError} if called for a lock
which is held by a different process.'

def test_unlockOther(self):

    lockf = self.mktemp()
    lockfile.symlink(str((os.getpid() + 1)), lockf)
    lock = lockfile.FilesystemLock(lockf)
    self.assertRaises(ValueError, lock.unlock)
