Expand tests around wpmu_delete_blog()

* Test cache after a site is deleted or flagged as deleted.
* Test tables after a site is deleted or flagged as deleted.
* Test tables and cache after the main site is deleted.
* Test site count after a site is deleted or flagged as deleted.

See #30080

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git-svn-id: http://core.svn.wordpress.org/trunk@30106 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In `get_terms()`, do not override 'hierarchical' and 'pad_counts' when 'parent' is present.

The previous behavior resulted in descendant terms being improperly excluded
from the results when passing a 'parent', even when 'hierarchical' had been
set to true.

The patch also adds unit tests that demonstrate the various interactions
between the 'child_of', 'parent', and 'hierarchical' parameters of `get_terms()`.

Props landakram.
Fixes #29815.
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git-svn-id: http://core.svn.wordpress.org/trunk@30107 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Clean up `get_term_by()` caching.

* Fix cache key/group modification that was missed in [30073].
* Update unit tests to reflect new key/group format.

Props tollmanz.
Fixes #21760.
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git-svn-id: http://core.svn.wordpress.org/trunk@30108 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the changelog for `get_approved_comments()` to reflect that the function was refactored to leverage `WP_Comment_Query` in [30098].

Also updates the `$args` parameter description with a reference to see `WP_Comment_Query` for argument information.

See #12668.

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git-svn-id: http://core.svn.wordpress.org/trunk@30109 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the changelog for `WP_Comment_Query::query()` to reflect two more new arguments added in [30096].

[30096] introduced the `type__in` and `type__not_in` arguments. See #30111 for documentation on those new arguments.

Fixes #12668.

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git-svn-id: http://core.svn.wordpress.org/trunk@30110 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the changelogs for the comment hook parameters added in [30092].

Parameters were added to the `get_comment_author`, `comment_author`, `get_comment_author_email`, `author_email`, `comment_email`, `get_comment_author_link`, `get_comment_author_IP`, `get_comment_author_url`, `comment_url`, `get_comment_excerpt`, `comment_excerpt`, `get_comment_ID`, and `get_comment_type` filters.

Fixes #22380.

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git-svn-id: http://core.svn.wordpress.org/trunk@30111 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Clean up cache invalidation suspension global in unit tests.

This fixes a test that was introduced in [30073] which was polluting later
tests.

See #21760.
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git-svn-id: http://core.svn.wordpress.org/trunk@30112 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Streamline some `get_terms()` cache tests.

* Split large method into a number of smaller tests.
* Create fewer fixtures.

See #30017.
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git-svn-id: http://core.svn.wordpress.org/trunk@30113 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve tests for domain_exists()

* Split existing tests for `domain_exists()` into many smaller tests.
* Make slightly fewer, more accurate assertions.
* Remove unnecessary site creation via factory.

See #30080

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git-svn-id: http://core.svn.wordpress.org/trunk@30114 1a063a9b-81f0-0310-95a4-ce76da25c4cd