[wp-trac] [WordPress Trac] #49606: Add visual regression testing to core

[WordPress Trac]

#49606: Add visual regression testing to core
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 Reporter:  isabel_brison            |       Owner:  (none)
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  5.9
Component:  Build/Test Tools         |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-refresh  |     Focuses:  ui, css
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Changes (by hellofromTonya):

 * keywords:  has-patch => has-patch needs-refresh
 * milestone:  Future Release => 5.9


Comment:

 Pulling this into 5.9 as it's part of the
 [https://make.wordpress.org/test/2021/10/06/5-9-end-to-end-e2e-strategy-
 session-summary/ Test Roadmap].

 [https://make.wordpress.org/test/2021/10/06/5-9-end-to-end-e2e-strategy-
 session-summary/ In talking with @isabel_brison more about this], the idea
 is to introduce the ability to run visual regression locally, not as part
 of the CI. This first step is an experiment to learn.

 - From these learnings, plans can be crafted for how to build it into an
 automated CI process.
 - The challenges for the CI are storage of the artifacts and unreliability
 of testing these across different environments. A third party service may
 be possibility to explore in the future.

 I think [https://github.com/WordPress/wordpress-develop/pull/209 PR 209]
 can be committed once it's refreshed and ready. @isabel_brison can you do
 a refresh? And then when done, please mark `commit` and remove `needs-
 refresh`. Then I'll get it committed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/49606#comment:44>
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