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| -rw-r--r-- | test/py/tests/test_sleep.py | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/py/tests/test_sleep.py b/test/py/tests/test_sleep.py new file mode 100644 index 0000000..64f1ddf --- /dev/null +++ b/test/py/tests/test_sleep.py @@ -0,0 +1,24 @@ +# 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.''' + + # Do this before we time anything, to make sure U-Boot is already running. + # Otherwise, the system boot time is included in the time measurement. + u_boot_console.ensure_spawned() + + # 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 |