EMemptysea·Feb 12, 2020
I think this might be what you are thinking of: https://github.com/facebookarchive/huxley
In Using Python and Selenium for automated visual regression testingfacebookarchive
huxley
Python2013–2020
facebookarchive / huxley · Archived
huxley
A testing system for catching visual regressions in Web applications.
13Distinct people
16Mentions
0Explicit recommenders
4KGitHub stars
What to know before exploring
What it is
A testing system for catching visual regressions in Web applications.
GitHub
Where it is used
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What people are saying
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Also in these discussions
- bbc-news/wraith · linked in 2 of the same discussions
Mentioned in the same Hacker News threads. That is not proof they are substitutes.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year16 dated mentions
Observed mentions: 2013-07-30 23:00:53 UTC to 2020-02-12 23:29:09 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 7 | 2 | 5 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
16 sourcesThis looks pretty neat! A few questions:
1. Are there plans for a multi-browser (especially mobile web) test runner?
2. Are there plans to detect change provenance (eg. if I change my heading height on a page, all the content below it will shift down. The change I really want to be notified about is that the header's height changed, not that everything was pushed down because of it)?
3. There are a lot of similar tools (eg. back in the day I used https://github.com/facebookarchive/huxley) - where does Appraise succeed where those tools failed, or what does Appraise do better?
In Show HN: Appraise – Visual test automationA testing system for catching visual regressions in Web applications
34 points · Open discussionProbably the best way to test things like that is with a visual regression testing tool [1][2]. In practice these are difficult to get right and tend to produce a lot of false positives and negatives. See for instance Huxley [3]
[1]: https://github.com/BBC-News/wraith
[2]: https://percy.io/
[3]: https://github.com/facebookarchive/huxley
In CSS coding techniquesA testing system for catching visual regressions in Web applications
9 points · Open discussionThere's also Huxley: https://github.com/facebook/huxley
In Strategies to quickly become productive in an unfamiliar codebaseHow does this compare to Huxley (https://github.com/facebook/huxley) ?
In Show HN: Computer vision to track and notify website changesFacebook does this with a project called Huxley[1]. It seems cool, but these sorts of tools have always suffered from the problem of brittle tests, so it is not a silver bullet. It does seem that it would work well, however, in systems that require stringent oversight around UI changes (like facebook). Places where "if a piece of UI changes by a pixel, we want to know about it and OK the change" is the standard (most apps do not fall into this category though).
[1] https://github.com/facebook/huxley
In When TDD Doesn't WorkHuxley is being used by Instagram for their www stack and is already open source. https://github.com/facebook/huxley
In Mobile at ScaleThere are a couple of open source projects for visual regression testing -
Wraith, used by BBC: https://github.com/BBC-News/wraith
Huxley, by Facebook: https://github.com/facebook/huxley
In VisualPing - Get notified on visual changes to a website or website areaYeah, we wrote Huxley to mitigate many of the GP's issues with UI testing by making it automatable and easy to bring up to date. http://github.com/facebook/huxley.
In Store screenshots of your web app in GitI think this is a great idea; it's what we do at Instagram and we use Huxley[0] to generate these screenshots. Keeping a set of "golden" screen shots and being able to view their history over time is awesome.
[0] http://github.com/facebook/huxley
In Store screenshots of your web app in GitHuxley 0.3 is out, featuring image diff and responsive design support
1 points · Open discussionLike window size? You can from the Python API, I just didn't include the option in the Huxleyfile. I've opened an issue here https://github.com/facebook/huxley/issues/2
Pixel ratio, I'm afraid, would be quite difficult.
In Huxley, an app that helps fight CSS and UI regressionShowing the 15 most recent of 16 sources. Enable JavaScript to search and browse every indexed mention.