test_linux.py 文件源码

def test_exe_mocked(self):
        with mock.patch('psutil._pslinux.os.readlink',
                        side_effect=OSError(errno.ENOENT, "")) as m:
            # No such file error; might be raised also if /proc/pid/exe
            # path actually exists for system processes with low pids
            # (about 0-20). In this case psutil is supposed to return
            # an empty string.
            ret = psutil.Process().exe()
            assert m.called
            self.assertEqual(ret, "")

            # ...but if /proc/pid no longer exist we're supposed to treat
            # it as an alias for zombie process
            with mock.patch('psutil._pslinux.os.path.lexists',
                            return_value=False):
                self.assertRaises(psutil.ZombieProcess, psutil.Process().exe)