test_process.py 文件源码

def test_nice(self):
        p = psutil.Process()
        self.assertRaises(TypeError, p.nice, "str")
        if WINDOWS:
            try:
                init = p.nice()
                if sys.version_info > (3, 4):
                    self.assertIsInstance(init, enum.IntEnum)
                else:
                    self.assertIsInstance(init, int)
                self.assertEqual(init, psutil.NORMAL_PRIORITY_CLASS)
                p.nice(psutil.HIGH_PRIORITY_CLASS)
                self.assertEqual(p.nice(), psutil.HIGH_PRIORITY_CLASS)
                p.nice(psutil.NORMAL_PRIORITY_CLASS)
                self.assertEqual(p.nice(), psutil.NORMAL_PRIORITY_CLASS)
            finally:
                p.nice(psutil.NORMAL_PRIORITY_CLASS)
        else:
            first_nice = p.nice()
            try:
                if hasattr(os, "getpriority"):
                    self.assertEqual(
                        os.getpriority(os.PRIO_PROCESS, os.getpid()), p.nice())
                p.nice(1)
                self.assertEqual(p.nice(), 1)
                if hasattr(os, "getpriority"):
                    self.assertEqual(
                        os.getpriority(os.PRIO_PROCESS, os.getpid()), p.nice())
                # XXX - going back to previous nice value raises
                # AccessDenied on OSX
                if not OSX:
                    p.nice(0)
                    self.assertEqual(p.nice(), 0)
            except psutil.AccessDenied:
                pass
            finally:
                try:
                    p.nice(first_nice)
                except psutil.AccessDenied:
                    pass