test_util.py 文件源码

def test_stdin(self):
        """
        Making sure getPassword accepts a password from standard input by
        running a child process which uses getPassword to read in a string
        which it then writes it out again.  Write a string to the child
        process and then read one and make sure it is the right string.
        """
        p = PasswordTestingProcessProtocol()
        p.finished = Deferred()
        reactor.spawnProcess(
            p,
            sys.executable,
            [sys.executable,
             '-c',
             ('import sys\n'
             'from twisted.python.util import getPassword\n'
              'sys.stdout.write(getPassword())\n'
              'sys.stdout.flush()\n')],
            env={'PYTHONPATH': os.pathsep.join(sys.path)})

        def processFinished((reason, output)):
            reason.trap(ProcessDone)
            self.assertEquals(output, [(1, 'secret')])