[wp-trac] [WordPress Trac] #42904: Speed up unit tests by disabling password hashing

[WordPress Trac]

#42904: Speed up unit tests by disabling password hashing
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 Reporter:  Frank Klein       |      Owner:
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 Whenever the factory creates a new user during a test, it calls
 `wp_insert_user()`. This function calls `wp_hash_password()`, which
 internally uses `PasswordHash::HashPassword()` to create a hash of the
 default password.

 In the context of most unit tests, users do not need hashed passwords.
 Hashing has a performance impact, so the tests should run a bit faster if
 we avoid hashing if we don't need to.

 The attached patch introduces a mock password hasher, that is used by the
 entirety of the tests The exception are a few tests that rely on
 authentication to work properly.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42904>
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