[wp-trac] [WordPress Trac] #40463: Get the tests for the 4.0 branch passing

[WordPress Trac]

#40463: Get the tests for the 4.0 branch passing
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 Reporter:  johnbillion       |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  Future Release
Component:  Build/Test Tools  |    Version:  4.0
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 '''tl;dr:''' Most of #30284 should be backported to the 4.0 branch (and
 earlier).

 The test suite did not pass in versions prior to 4.1. Failing tests were
 committed to the test suite but skipped with the now-defunct `knownWPBug`
 notation.

 Work on recent tickets such as #35105, #39486, and #40086 means the 4.1 to
 4.6 branches are passing once again, but 4.0 (and earlier) basically needs
 most of the changes in #30284 applying to it.

 Having a passing test suite in the 4.0 branch means we can be more
 confident in patch releases.

 Related: #40100, #40106.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40463>
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