It's not great to use asserts in util functions like this because it breaks the arrange-act-assert rule, but using checks is worse because they will crash the test process on failure (= no other tests get run after that). Bug: b/143587130 Change-Id: If4d085311de0792b9fca1584db299fd24199e72e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/162360 Reviewed-by: Artem Titov <titovartem@webrtc.org> Commit-Queue: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30093}