tree 4c6c72e4e8ead70004a68ba14c01ce77d15476fd
parent 102a1ecbde9d73c9241bbd85011135071ecb6552
author Ross Wang <rosswang@google.com> 1550190464 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1550204420 +0000

[web_runner][test] Deflaking pixel tests

These tests can flake when a screenshot captures a frame from the previous
test, which can advance the test logic early. Adding a temporary solution that
waits for a blank on setup. Better solutions include hermetic Scenic
(complicated by CF-605) or refactoring to use view state events (probably the
best solution; greatly improves determinism at the expense of added harness
complexity).

FLK-49 #done

Test: fx run-test web_runner_tests

Change-Id: I1be058ed9a2fa1bdb05ab8a1d5d67bdffc46208e