# Copyright 2017 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.

from autotest_lib.client.bin import test
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib.cros import test_webrtc_peer_connection

EXTRA_BROWSER_ARGS = ['--use-fake-ui-for-media-stream',
                      '--use-fake-device-for-media-stream']

class video_WebRtcResolutionSwitching(test.test):
    """Tests multiple peerconnections that randomly change resolution."""
    version = 1

    def run_once(self, mode = 'functional'):
        """
        Runs the test.

        @param mode: 'functional' or 'performance' depending on desired mode.
        """
        kwargs = {
                'own_script': 'resolution-switching.js',
                'common_script': 'loopback-peerconnection.js',
                'bindir': self.bindir,
                'tmpdir': self.tmpdir,
                'debugdir': self.debugdir,
                'num_peer_connections': 5,
                'iteration_delay_millis': 300
        }

        if mode == 'functional':
            test = test_webrtc_peer_connection.WebRtcPeerConnectionTest(
                    title = 'Resolution Switching',
                    **kwargs)
            test.run_test()
        elif mode == 'performance':
            test = test_webrtc_peer_connection\
                    .WebRtcPeerConnectionPerformanceTest(
                            title = 'Resolution Switching Performance Test',
                            **kwargs)
            test.run_test()
            test.collector.write_metrics(self.output_perf_value)
        else:
            raise error.TestError('mode must be "functional" or "performance"')