1# SPDX-License-Identifier: GPL-2.0
2# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3
4import pytest
5import time
6
7"""
8Note: This test doesn't rely on boardenv_* configuration values but they can
9change test behavior.
10
11# Setup env__sleep_accurate to False if time is not accurate on your platform
12env__sleep_accurate = False
13
14# Setup env__sleep_time time in seconds board is set to sleep
15env__sleep_time = 3
16
17# Setup env__sleep_margin set a margin for any system overhead
18env__sleep_margin = 0.25
19
20"""
21
22def test_sleep(u_boot_console):
23    """Test the sleep command, and validate that it sleeps for approximately
24    the correct amount of time."""
25
26    sleep_skip = u_boot_console.config.env.get('env__sleep_accurate', True)
27    if not sleep_skip:
28        pytest.skip('sleep is not accurate')
29
30    if u_boot_console.config.buildconfig.get('config_cmd_misc', 'n') != 'y':
31        pytest.skip('sleep command not supported')
32
33    # 3s isn't too long, but is enough to cross a few second boundaries.
34    sleep_time = u_boot_console.config.env.get('env__sleep_time', 3)
35    sleep_margin = u_boot_console.config.env.get('env__sleep_margin', 0.25)
36    tstart = time.time()
37    u_boot_console.run_command('sleep %d' % sleep_time)
38    tend = time.time()
39    elapsed = tend - tstart
40    assert elapsed >= (sleep_time - 0.01)
41    if not u_boot_console.config.gdbserver:
42        # margin is hopefully enough to account for any system overhead.
43        assert elapsed < (sleep_time + sleep_margin)
44