blob: ca96b1da8da12d5b91d52be769499567fe53dab2 [file] [log] [blame]
# Copyright (c) 2014 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 os
import logging
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib.cros import chrome
from autotest_lib.client.cros import touch_playback_test_base
class touch_MouseScroll(touch_playback_test_base.touch_playback_test_base):
"""Plays back mouse scrolls and checks for correct page movement."""
version = 1
_MOUSE_DESCRIPTION = 'amazon_mouse.prop'
_APPLE_MOUSE_DES = 'apple_mouse.prop'
_EXPECTED_VALUE_1 = 16 # Expected value of one scroll wheel turn.
_EXPECTED_DIRECTION = {'down': 1, 'up': -1, 'right': 1, 'left': -1}
_TOLLERANCE = 4 # Fast scroll should go at least X times slow scroll.
def _get_scroll_delta(self, name, expected_direction, scroll_vertical=True):
"""Playback the given test and return the amount the page moved.
@param name: name of test filename.
@param expected_direction: an integer that is + for down and - for up.
@param scroll_vertical: True for vertical scroll,
False for horizontal scroll.
@raise: TestFail if scrolling did not occur in expected direction.
start_scroll = self._events.get_scroll_position(scroll_vertical)
self._playback(self._gest_file_path[name], touch_type='mouse')
end_scroll = self._events.get_scroll_position(scroll_vertical)
delta = end_scroll - start_scroll'Test %s: saw scroll delta of %d. Expected direction %d.',
name, delta, expected_direction)
if delta * expected_direction < 0:
raise error.TestFail('Scroll was in wrong direction! Delta '
'for %s was %d.' % (name, delta))
return delta
def _verify_single_tick(self, direction, scroll_vertical=True):
"""Verify that using the scroll wheel goes the right distance.
Expects a file (playback gesture file) named direction + '_1'.
@param direction: string indicating direction up, down, right and left.
@param scroll_vertical: scroll_vertical is True for vertical scroll
else False
name = direction + '_1'
expected_direction = self._EXPECTED_DIRECTION[direction]
expected_value = self._EXPECTED_VALUE_1 * expected_direction
delta = self._get_scroll_delta(name, expected_direction,
if delta != expected_value:
raise error.TestFail('One tick scroll was wrong size: actual=%d, '
'expected=%d.' % (delta, expected_value))
def _verify_fast_vs_slow(self, direction, scroll_vertical=True):
"""Verify that fast scrolling goes farther than slow scrolling.
Expects files (playback gesture file) named direction + '_slow'
and direction + '_fast'.
@param direction: string indicating direction up, down, right and left.
@param scroll_vertical: True for vertical scroll,
False for horizontal scroll.
slow = direction + '_slow'
fast = direction + '_fast'
expected = self._EXPECTED_DIRECTION[direction]
slow_delta = self._get_scroll_delta(slow, expected, scroll_vertical)
fast_delta = self._get_scroll_delta(fast, expected, scroll_vertical)
if abs(fast_delta) < self._TOLLERANCE * abs(slow_delta):
raise error.TestFail('Fast scroll should be much farther than '
'slow! (%s). %d vs. %d.' %
(direction, slow_delta, fast_delta))
def run_once(self):
"""Entry point of this test."""
# Link path for files to playback on DUT.
self._gest_file_path = {}
gestures_dir = os.path.join(self.bindir, 'gestures')
for filename in os.listdir(gestures_dir):
self._gest_file_path[filename] = os.path.join(gestures_dir,
with chrome.Chrome(init_network_controller=True) as cr:
# Open test page.
# Emulate mouse with vertical scroll feature.
mouse_file = os.path.join(self.bindir, self._MOUSE_DESCRIPTION)
if not self._has_mouse:
raise error.TestError('No USB mouse found on this device.')
# In test page, position cursor to center.
# Test vertical scrolling.
for direction in ['down', 'up']:
# Emulate mouse with horizontal scroll feature.
apple_mouse_file = os.path.join(self.bindir, self._APPLE_MOUSE_DES)
if not self._has_mouse:
raise error.TestError('No USB mouse found on this device.')
# Test horizontal scrolling.
for direction in ['right', 'left']:
self._verify_single_tick(direction, scroll_vertical=False)
self._verify_fast_vs_slow(direction, scroll_vertical=False)