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      1 # Copyright 2016 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 from autotest_lib.client.bin import test
      6 from autotest_lib.client.bin import utils
      7 from autotest_lib.client.common_lib import error
      8 from autotest_lib.client.common_lib.cros import chrome
      9 from autotest_lib.client.cros.graphics import graphics_utils
     10 from autotest_lib.client.cros.input_playback import input_playback
     11 
     12 
     13 class platform_InputBrightness(test.test):
     14     """Tests if device suspends using shortcut keys."""
     15     version = 1
     16     BRIGHTNESS_CMD = "backlight_tool --get_brightness_percent"
     17     RESET_BRIGHTNESS_CMD = "backlight_tool --set_brightness_percent=70.0"
     18 
     19     def warmup(self):
     20         """Test setup."""
     21         # Emulate keyboard.
     22         # See input_playback. The keyboard is used to play back shortcuts.
     23         self._player = input_playback.InputPlayback()
     24         self._player.emulate(input_type='keyboard')
     25         self._player.find_connected_inputs()
     26 
     27     def test_brightness_down(self):
     28         """
     29         Use keyboard shortcut to test brightness Down (F6) key.
     30 
     31         @raises: error.TestFail if system brightness did not decrease.
     32 
     33         """
     34         sys_brightness = self.get_system_brightness()
     35         if not sys_brightness:
     36             utils.system_output(self.RESET_BRIGHTNESS_CMD)
     37             sys_brightness = self.get_system_brightness()
     38         self._player.blocking_playback_of_default_file(
     39             input_type='keyboard', filename='keyboard_f6')
     40         if not sys_brightness > self.get_system_brightness():
     41             raise error.TestFail("Brightness did not decrease from: %s" % sys_brightness)
     42 
     43     def test_brightness_up(self):
     44         """
     45         Use keyboard shortcut to test brightness Up (F7) key.
     46 
     47         @raises: error.TestFail if system brightness did not increase.
     48 
     49         """
     50         sys_brightness = self.get_system_brightness()
     51         if sys_brightness == 100:
     52             utils.system_output(self.RESET_BRIGHTNESS_CMD)
     53             sys_brightness = self.get_system_brightness()
     54         self._player.blocking_playback_of_default_file(
     55             input_type='keyboard', filename='keyboard_f7')
     56         if not sys_brightness < self.get_system_brightness():
     57             raise error.TestFail("Brightness did not increase from: %s" % sys_brightness)
     58 
     59 
     60     def get_system_brightness(self):
     61         """
     62         Get current system brightness percent (0.0-100.0).
     63 
     64         @returns: current system brightness.
     65         """
     66         sys_brightness = utils.system_output(self.BRIGHTNESS_CMD)
     67         return float(sys_brightness)
     68 
     69 
     70     def run_once(self):
     71         """
     72         Open browser, and affect brightness using  up and down functions.
     73 
     74         @raises: error.TestFail if brightness keys (F6/F7) did not work.
     75 
     76         """
     77         # Check for internal_display
     78         if not graphics_utils.has_internal_display():
     79             raise error.TestNAError('Test can not proceed on '
     80                                     'devices without internal display.')
     81         with chrome.Chrome():
     82             self.test_brightness_up()
     83             self.test_brightness_down()
     84 
     85 
     86     def cleanup(self):
     87         """Test cleanup."""
     88         self._player.close()
     89         utils.system_output(self.RESET_BRIGHTNESS_CMD)
     90