test_process.py 文件源码

def test_children_recursive(self):
        # here we create a subprocess which creates another one as in:
        # A (parent) -> B (child) -> C (grandchild)
        s = "import subprocess, os, sys, time;"
        s += "PYTHON = os.path.realpath(sys.executable);"
        s += "cmd = [PYTHON, '-c', 'import time; time.sleep(60);'];"
        s += "subprocess.Popen(cmd);"
        s += "time.sleep(60);"
        get_test_subprocess(cmd=[PYTHON, "-c", s])
        p = psutil.Process()
        self.assertEqual(len(p.children(recursive=False)), 1)
        # give the grandchild some time to start
        stop_at = time.time() + GLOBAL_TIMEOUT
        while time.time() < stop_at:
            children = p.children(recursive=True)
            if len(children) > 1:
                break
        self.assertEqual(len(children), 2)
        self.assertEqual(children[0].ppid(), os.getpid())
        self.assertEqual(children[1].ppid(), children[0].pid)