[wp-trac] [WordPress Trac] #53997: Add some unit tests for the WP_Upgrader class

[WordPress Trac]

#53997: Add some unit tests for the WP_Upgrader class
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 Reporter:  SergeyBiryukov    |       Owner:  (none)
     Type:  task (blessed)    |      Status:  new
 Priority:  normal            |   Milestone:  5.9
Component:  Upgrade/Install   |     Version:
 Severity:  normal            |  Resolution:
 Keywords:  needs-unit-tests  |     Focuses:
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Comment (by SergeyBiryukov):

 Related: #54245

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Ticket URL: <https://core.trac.wordpress.org/ticket/53997#comment:1>
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