commit 3871f6f9d417f10d971b8332c82acc4924eec221
author Steve Anton <steveanton@webrtc.org> Fri Jan 26 18:25:53 2018
committer Commit Bot <commit-bot@chromium.org> Fri Jan 26 19:40:02 2018
tree 5a55699a4f3ce318e4bd5c1299944f5753002ead
parent 4dbc7e4f2bd6a50ba1764719cbc1ca2cd14650db

Rewrite StatsCollector tests to use a fake PeerConnection

This removes use of the MockPeerConnection and replaces it with a fake
implementation of PeerConnection tailored to the needs of
StatsCollector and (soon) RTCStatsCollector.

The stats collector tests really care about the PeerConnection only so
much as to set up scenarios to test the StatsCollector with. Since each
scenario (e.g., adding a track) affects the results of multiple methods
(e.g., voice_channel and SessionStats), the tests were needing to
manually configure these dependent operations which was tedious, error
prone and difficult to change. The new fake lets the tests express the
scenario more concisely (e.g., AddVoiceChannel) while filling in all
the affected methods on the PeerConnection automatically. Furthermore,
this can be expanded to use with the RTCStatsCollector and to cover
more scenarios in the future.

Bug: webrtc:8764
Change-Id: I195074174684256543f7cdc27c3834e5ff0b4702
Reviewed-on: https://webrtc-review.googlesource.com/43521
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Peter Thatcher <pthatcher@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21778}