Changeset 34677 for trunk/tests/phpunit/tests/template/author.php

Introduce get_the_author_posts_link(), which returns the HTML link to the author page for the current post's author.

the_author_posts_link() has in-turn been converted into a wrapper, with most of its logic moved to the new function.

Adds tests for the new function.

Props chipbennett, zrothauser, wonderboymusic, DrewAPicture.
Fixes #30355.