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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
5import logging
6
7from autotest_lib.client.common_lib import error
8from autotest_lib.client.common_lib.cros import chrome
9from autotest_lib.client.cros import touch_playback_test_base
10
11
12class touch_TouchscreenZoom(touch_playback_test_base.touch_playback_test_base):
13    """Plays back touchscreen zoom and checks for correct page movement.
14
15    Test zooms in and then out, checking that direction is correct.
16
17    """
18    version = 1
19
20    _DIRECTIONS = ['in', 'out']
21    _FILENAME_FMT_STR = 'zoom-%s'
22
23
24    def _check_zoom_in_one_direction(self, direction):
25        logging.info('Starting to zoom %s', direction)
26        start_level = self._events.get_page_zoom()
27        self._events.clear_previous_events()
28
29        self._playback(self._filepaths[direction], 'touchscreen')
30
31        self._events.wait_for_events_to_complete()
32        end_level = self._events.get_page_zoom()
33        delta = end_level - start_level
34
35        if delta == 0:
36            self._events.log_events()
37            raise error.TestFail('No page zoom occurred!')
38
39        if ((delta < 0 and direction == 'in') or
40            (delta > 0 and direction == 'out')):
41            self._events.log_events()
42            raise error.TestFail('Zoom was in the wrong direction!')
43
44
45    def _is_testable(self):
46        """Return True if test can run on this device, else False.
47
48        @raises: TestError if host has no touchscreen when it should.
49
50        """
51        # Raise error if no touchscreen detected.
52        if not self._has_touchscreen:
53            raise error.TestError('No touchscreen found on this device!')
54
55        # Check if playback files are available on DUT to run test.
56        self._filepaths = self._find_test_files_from_directions(
57                'touchscreen', self._FILENAME_FMT_STR, self._DIRECTIONS)
58        if not self._filepaths:
59            logging.info('Missing gesture files, Aborting test.')
60            return False
61
62        return True
63
64
65    def run_once(self):
66        """Entry point of this test."""
67        if not self._is_testable():
68            return
69
70        # Log in and start test.
71        with chrome.Chrome(init_network_controller=True) as cr:
72            self._open_events_page(cr)
73            self._events.set_prevent_defaults(False)
74
75            # Zoom in and out on test page.
76            for direction in self._DIRECTIONS:
77                self._check_zoom_in_one_direction(direction)
78