# Copyright (c) 2010 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.

AUTHOR = "Chrome OS Team"
NAME = "power_Backlight"
PURPOSE = "Verify the backlight properties are correct."
CRITERIA = """
Fail if any of the following occur:
  - the backlight cannot be adjusted through software calls
  - the backlight does not support at least 5 levels
  - turning down the backlight does not use less energy
"""
TIME = "MEDIUM"
TEST_CATEGORY = "Functional"
TEST_CLASS = "power"
TEST_TYPE = "client"

DOC = """
This test verifies that the following properties about the backlight:
  - The backlight can be adjusted in software using
    the /sys/class/backlight interface
  - The backlight must support at least five distinct levels.
  - As you turn up the backlight from 0% -> 25% -> 50% -> 75% -> 100%,
    each successive bump uses more energy than the previous level.
"""

job.run_test("power_Backlight")