[wp-trac] [WordPress Trac] #36170: Small refactor in the validate_file method + unit tests

[WordPress Trac]

#36170: Small refactor in the validate_file method + unit tests
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 Reporter:  borgesbruno                          |       Owner:
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
Component:  General                              |  Review
 Severity:  normal                               |     Version:
 Keywords:  has-patch has-unit-tests dev-        |  Resolution:
  feedback                                       |     Focuses:
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Comment (by borgesbruno):

 Please review

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Ticket URL: <https://core.trac.wordpress.org/ticket/36170#comment:4>
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