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# Lint as: python2, python3
# Copyright 2016 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import logging
import time
from autotest_lib.client.bin import test
from autotest_lib.client.bin import utils
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib.cros import chrome
from autotest_lib.client.cros.graphics import graphics_utils
from autotest_lib.client.cros.input_playback import input_playback
BRIGHTNESS_LEVELS = 16
class platform_InputBrightness(test.test):
"""Tests if device suspends using shortcut keys."""
version = 1
BRIGHTNESS_CMD = "backlight_tool --get_brightness_percent"
RESET_BRIGHTNESS_CMD = "backlight_tool --set_brightness_percent=70.0"
WAIT_TIME = 1
def warmup(self):
"""Test setup."""
# Emulate keyboard.
# See input_playback. The keyboard is used to play back shortcuts.
self._player = input_playback.InputPlayback()
self._player.emulate(input_type='keyboard')
self._player.find_connected_inputs()
def test_brightness_down(self, verify_brightness=True):
"""
Use keyboard shortcut to test brightness Down (F6) key.
@raises: error.TestFail if system brightness did not decrease.
"""
for level in range(0, BRIGHTNESS_LEVELS):
logging.debug("Decreasing the brightness. Level %s", level)
sys_brightness = self.get_system_brightness()
self._player.blocking_playback_of_default_file(
input_type='keyboard', filename='keyboard_f6')
time.sleep(self.WAIT_TIME)
if verify_brightness:
if not sys_brightness > self.get_system_brightness():
raise error.TestFail("Brightness did not decrease from: "
"%s" % sys_brightness)
def test_brightness_up(self, verify_brightness=True):
"""
Use keyboard shortcut to test brightness Up (F7) key.
@raises: error.TestFail if system brightness did not increase.
"""
for level in range(0, BRIGHTNESS_LEVELS):
logging.debug("Increasing the brightness. Level %s", level)
sys_brightness = self.get_system_brightness()
self._player.blocking_playback_of_default_file(
input_type='keyboard', filename='keyboard_f7')
time.sleep(self.WAIT_TIME)
if verify_brightness:
if not sys_brightness < self.get_system_brightness():
raise error.TestFail("Brightness did not increase from: "
"%s" % sys_brightness)
def get_system_brightness(self):
"""
Get current system brightness percent (0.0-100.0).
@returns: current system brightness.
"""
sys_brightness = utils.system_output(self.BRIGHTNESS_CMD)
return float(sys_brightness)
def run_once(self):
"""
Open browser, and affect brightness using up and down functions.
@raises: error.TestFail if brightness keys (F6/F7) did not work.
"""
# Check for internal_display
if not graphics_utils.has_internal_display():
raise error.TestNAError('Test can not proceed on '
'devices without internal display.')
with chrome.Chrome():
logging.info("Increasing the initial brightness to max without "
"verifying brightness.")
# Not using command to set max brightness because
# the brightness button stays at the current level
# only irrespective of the command
self.test_brightness_up(verify_brightness=False)
# Actual test starts from here.
self.test_brightness_down(verify_brightness=True)
self.test_brightness_up(verify_brightness=True)
def cleanup(self):
"""Test cleanup."""
self._player.close()
utils.system_output(self.RESET_BRIGHTNESS_CMD)
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