1# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. 2# 3# SPDX-License-Identifier: GPL-2.0 4 5import pytest 6import time 7 8def test_sleep(u_boot_console): 9 """Test the sleep command, and validate that it sleeps for approximately 10 the correct amount of time.""" 11 12 # 3s isn't too long, but is enough to cross a few second boundaries. 13 sleep_time = 3 14 tstart = time.time() 15 u_boot_console.run_command('sleep %d' % sleep_time) 16 tend = time.time() 17 elapsed = tend - tstart 18 delta_to_expected = abs(elapsed - sleep_time) 19 # 0.25s margin is hopefully enough to account for any system overhead. 20 assert delta_to_expected < 0.25 21