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1# Copyright 2017 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
6import os
7
8from autotest_lib.client.bin import test
9from autotest_lib.client.bin import utils
10from autotest_lib.client.common_lib import error
11from autotest_lib.client.common_lib.cros import chrome
12from autotest_lib.client.cros.video import helper_logger
13
14EXTRA_BROWSER_ARGS = ['--use-fake-ui-for-media-stream',
15                      '--use-fake-device-for-media-stream']
16
17# Polling timeout.
18TIMEOUT = 70
19
20# The test's runtime.
21TEST_RUNTIME_SECONDS = 60
22
23# Number of peer connections to use.
24NUM_PEER_CONNECTIONS = 10
25
26# Delay between each iteration of pausing/playing the feeds.
27PAUSE_PLAY_ITERATION_DELAY_MILLIS = 20;
28
29
30class webrtc_PausePlayPeerConnections(test.test):
31    """Tests many peerconnections randomly paused and played."""
32    version = 1
33
34    def start_test(self, cr, element_type):
35        """Opens the WebRTC pause-play page.
36
37        @param cr: Autotest Chrome instance.
38        @param element_type: 'video' or 'audio'. String.
39        """
40        cr.browser.platform.SetHTTPServerDirectories(self.bindir)
41
42        self.tab = cr.browser.tabs[0]
43        self.tab.Navigate(cr.browser.platform.http_server.UrlOf(
44                os.path.join(self.bindir, 'pause-play.html')))
45        self.tab.WaitForDocumentReadyStateToBeComplete()
46        self.tab.EvaluateJavaScript(
47                "startTest(%d, %d, %d, %s)" % (
48                        TEST_RUNTIME_SECONDS,
49                        NUM_PEER_CONNECTIONS,
50                        PAUSE_PLAY_ITERATION_DELAY_MILLIS,
51                        element_type))
52
53    def wait_test_completed(self, timeout_secs):
54        """Waits until the test is done.
55
56        @param timeout_secs Max time to wait in seconds.
57
58        @raises TestError on timeout, or javascript eval fails.
59        """
60        def _test_done():
61            status = self.tab.EvaluateJavaScript('testRunner.getStatus()')
62            logging.debug(status)
63            return status == 'ok-done'
64
65        utils.poll_for_condition(
66                _test_done, timeout=timeout_secs, sleep_interval=1,
67                desc='pause-play.html reports itself as finished')
68
69    @helper_logger.video_log_wrapper
70    def run_once(self, element_type='video'):
71        """Runs the test."""
72        with chrome.Chrome(extra_browser_args = EXTRA_BROWSER_ARGS + \
73                           [helper_logger.chrome_vmodule_flag()],
74                           init_network_controller = True) as cr:
75            self.start_test(cr, element_type)
76            self.wait_test_completed(TIMEOUT)
77            self.print_result()
78
79    def print_result(self):
80        """Prints results unless status is different from ok-done.
81
82        @raises TestError if the test failed outright.
83        """
84        status = self.tab.EvaluateJavaScript('testRunner.getStatus()')
85        if status != 'ok-done':
86            raise error.TestFail('Failed: %s' % status)
87
88        results = self.tab.EvaluateJavaScript('testRunner.getResults()')
89        logging.info('runTimeSeconds: %.2f', results['runTimeSeconds'])
90
91        self.output_perf_value(
92                description='run_time',
93                value=results['runTimeSeconds'],
94                units='seconds');
95