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}
3871f6f9d4