[wp-trac] [WordPress Trac] #59607: HTML API: Fix - avoid calling subclass method while internally scanning in Tag Processor

[WordPress Trac]

#59607: HTML API: Fix - avoid calling subclass method while internally scanning in
Tag Processor
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 Reporter:  dmsnell                              |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  6.4
Component:  HTML API                             |     Version:  trunk
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-unit-tests needs-      |     Focuses:
  testing-info                                   |
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Comment (by dmsnell):

 Thanks @nicolefurlan - for testing, it would be helpful for someone to
 follow the pattern in the added unit test. There should be no existing
 code affected by this change, so I think any testing is going to follow
 one of three approaches:
  - replicate the unit test
  - smoke test WordPress with this patch and ensure that things aren't
 entirely obviously broken (e.g. do heading block H2's have the `wp-block-
 heading` class). most of these smoke-tests are already covered by existing
 tests in the test suite.
  - think up some interesting way to try and break the HTML processing,
 which is what led to this patch in the first place.

 I'm sorry I don't have better testing instructions, but on the other hand,
 at least the test suite is fairly comprehensive, so I'm confident this
 isn't causing blatant and unwanted side-effects

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Ticket URL: <https://core.trac.wordpress.org/ticket/59607#comment:5>
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