[wp-trac] [WordPress Trac] #28692: Polluted table_prefix and switched_stack in multisite unit tests

[WordPress Trac]

#28692: Polluted table_prefix and switched_stack in multisite unit tests
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 Reporter:  jeremyfelt        |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  4.0
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:  has-patch
  Focuses:  multisite         |
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 At present, and seemingly since [27511], there are many test failures in
 multisite around various queries. Through these failures, I was seeing
 several `Cannot use object of type WP_Error as array` messages appear
 because the tests were trying to use database tables that didn't exist due
 to a polluted `$_wp_switched_stack` that still thought it was on site 67
 after a tear down.

 As of [28910], this gets even crazier and pollutes `$table_prefix` so that
 we end up with queries for `wptests_66_66_66_67_67_67_68_terms`, etc...

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Ticket URL: <https://core.trac.wordpress.org/ticket/28692>
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