xref: /openbmc/u-boot/test/py/tests/test_sleep.py (revision 699e831e)
1# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
2#
3# SPDX-License-Identifier: GPL-2.0
4
5import pytest
6import time
7
8"""
9Note: This test doesn't rely on boardenv_* configuration values but they can
10change test behavior.
11
12# Setup env__sleep_accurate to False if time is not accurate on your platform
13env__sleep_accurate = False
14
15"""
16
17def test_sleep(u_boot_console):
18    """Test the sleep command, and validate that it sleeps for approximately
19    the correct amount of time."""
20
21    sleep_skip = u_boot_console.config.env.get('env__sleep_accurate', True)
22    if not sleep_skip:
23        pytest.skip('sleep is not accurate')
24
25    if u_boot_console.config.buildconfig.get('config_cmd_misc', 'n') != 'y':
26        pytest.skip('sleep command not supported')
27    # 3s isn't too long, but is enough to cross a few second boundaries.
28    sleep_time = 3
29    tstart = time.time()
30    u_boot_console.run_command('sleep %d' % sleep_time)
31    tend = time.time()
32    elapsed = tend - tstart
33    assert elapsed >= (sleep_time - 0.01)
34    if not u_boot_console.config.gdbserver:
35        # 0.25s margin is hopefully enough to account for any system overhead.
36        assert elapsed < (sleep_time + 0.25)
37