commit | 095afdd1e826e3f5238af9f723eb918f52a8815a | [log] [tgz] |
---|---|---|
author | Michael Comella <michael.l.comella@gmail.com> | Wed Aug 24 18:01:37 2022 |
committer | moz-wptsync-bot <wptsync@mozilla.com> | Thu Aug 25 22:31:23 2022 |
tree | 344dbb78257eb69252c62854a61606e8dc7b944c | |
parent | 619e6e909898f16fa2a07c673700fb353ac4fbed [diff] |
sleep in measure_associated_with_navigation_timing. The root cause of the intermittent failure is that the test records one set of PerformanceMarks, records another, and verifies the duration of the measures of the second set are larger than the first set but they're unexpectedly equal. I speculate this happens because either the test executes fast enough that the clock doesn't increment or our precision reduction code (to mitigate against timing attacks) is rounding the before/after values to the same value. This solution is speculative because I was unable to reproduce the error locally so need to test it on WPT CI. The solution may fail intermittently if we don't sleep for long enough. A more correct solution to this problem would be to mock the clock and programmatically advance it but I didn't want to take the time. Another possible solution, that is stable, is to change the assertions to `test_greater_or_equal` but this could hide legitimate bugs, e.g. we accidentally return the same PerformanceMeasure for both queries. Differential Revision: https://phabricator.services.mozilla.com/D155420 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1772416 gecko-commit: 93de313ddf70ef4138b4d06702a9f350653908d9 gecko-reviewers: sefeng
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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Clone or otherwise get https://github.com/web-platform-tests/wpt.
Note: because of the frequent creation and deletion of branches in this repo, it is recommended to “prune” stale branches when fetching updates, i.e. use git pull --prune
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See the documentation website and in particular the system setup for running tests locally.
The wpt
command provides a frontend to a variety of tools for working with and running web-platform-tests. Some of the most useful commands are:
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test manifestwpt install
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or the path to the python binary (if python
is not in your %PATH%
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