test_subprocess.py 文件源码

def test_communicate_timeout(self):
        p = subprocess.Popen([sys.executable, "-c",
                              'import sys,os,time;'
                              'sys.stderr.write("pineapple\\n");'
                              'time.sleep(1);'
                              'sys.stderr.write("pear\\n");'
                              'sys.stdout.write(sys.stdin.read())'],
                             universal_newlines=True,
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
        self.assertRaises(subprocess.TimeoutExpired, p.communicate, "banana",
                          timeout=0.3)
        # Make sure we can keep waiting for it, and that we get the whole output
        # after it completes.
        (stdout, stderr) = p.communicate()
        self.assertEqual(stdout, "banana")
        self.assertStderrEqual(stderr.encode(), b"pineapple\npear\n")