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# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0
import pytest
import time
def test_sleep(u_boot_console):
"""Test the sleep command, and validate that it sleeps for approximately
the correct amount of time."""
# 3s isn't too long, but is enough to cross a few second boundaries.
sleep_time = 3
tstart = time.time()
u_boot_console.run_command('sleep %d' % sleep_time)
tend = time.time()
elapsed = tend - tstart
delta_to_expected = abs(elapsed - sleep_time)
# 0.25s margin is hopefully enough to account for any system overhead.
assert delta_to_expected < 0.25
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