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Execute "sleep", and validate that it sleeps for approximately the correct amount of time. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
25 lines
849 B
Python
25 lines
849 B
Python
# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
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#
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# SPDX-License-Identifier: GPL-2.0
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import pytest
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import time
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def test_sleep(u_boot_console):
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'''Test the sleep command, and validate that it sleeps for approximately
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the correct amount of time.'''
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# Do this before we time anything, to make sure U-Boot is already running.
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# Otherwise, the system boot time is included in the time measurement.
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u_boot_console.ensure_spawned()
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# 3s isn't too long, but is enough to cross a few second boundaries.
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sleep_time = 3
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tstart = time.time()
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u_boot_console.run_command('sleep %d' % sleep_time)
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tend = time.time()
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elapsed = tend - tstart
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delta_to_expected = abs(elapsed - sleep_time)
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# 0.25s margin is hopefully enough to account for any system overhead.
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assert delta_to_expected < 0.25
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