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<title>[58335] trunk: Comments: Ensure the correct comment ID type is passed to `get_comment_author`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/58335">58335</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/58335","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-06-04 15:27:57 +0000 (Tue, 04 Jun 2024)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Comments: Ensure the correct comment ID type is passed to `get_comment_author`.

The `$comment_id` parameter of the `get_comment_author` filter is documented as a numeric string, however in case a non-existing comment ID is passed to the `get_comment_author()` function, it could be an integer instead.

This commit resolves the issue and adds a PHPUnit test demonstrating the behavior.

Includes updating `get_comment_author_url()` unit tests for consistency.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/41127">[41127]</a>, <a href="https://core.trac.wordpress.org/changeset/52818">[52818]</a>.

Props david.binda.
Fixes <a href="https://core.trac.wordpress.org/ticket/60475">#60475</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescommenttemplatephp">trunk/src/wp-includes/comment-template.php</a></li>
<li><a href="#trunktestsphpunittestscommentgetCommentAuthorEmailLinkphp">trunk/tests/phpunit/tests/comment/getCommentAuthorEmailLink.php</a></li>
<li><a href="#trunktestsphpunittestscommentgetCommentAuthorUrlphp">trunk/tests/phpunit/tests/comment/getCommentAuthorUrl.php</a></li>
<li><a href="#trunktestsphpunittestscommentgetCommentAuthorUrlLinkphp">trunk/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestscommentgetCommentAuthorphp">trunk/tests/phpunit/tests/comment/getCommentAuthor.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludescommenttemplatephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/comment-template.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/comment-template.php        2024-06-04 14:50:24 UTC (rev 58334)
+++ trunk/src/wp-includes/comment-template.php  2024-06-04 15:27:57 UTC (rev 58335)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -24,7 +24,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function get_comment_author( $comment_id = 0 ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $comment = get_comment( $comment_id );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $comment_id = ! empty( $comment->comment_ID ) ? $comment->comment_ID : $comment_id;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $comment_id = ! empty( $comment->comment_ID ) ? $comment->comment_ID : (string) $comment_id;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        if ( empty( $comment->comment_author ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $user = ! empty( $comment->user_id ) ? get_userdata( $comment->user_id ) : false;
</span></span></pre></div>
<a id="trunktestsphpunittestscommentgetCommentAuthorphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/comment/getCommentAuthor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/comment/getCommentAuthor.php                            (rev 0)
+++ trunk/tests/phpunit/tests/comment/getCommentAuthor.php      2024-06-04 15:27:57 UTC (rev 58335)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,59 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * @group comment
+ *
+ * @covers ::get_comment_author
+ */
+class Tests_Comment_GetCommentAuthor extends WP_UnitTestCase {
+
+       private static $comment;
+       private static $non_existent_comment_id;
+
+       public static function set_up_before_class() {
+               parent::set_up_before_class();
+
+               self::$comment = self::factory()->comment->create_and_get(
+                       array(
+                               'comment_post_ID' => 0,
+                       )
+               );
+       }
+
+       public function get_comment_author_filter( $comment_author, $comment_id, $comment ) {
+               $this->assertSame( $comment_id, self::$comment->comment_ID, 'Comment IDs do not match.' );
+               $this->assertTrue( is_string( $comment_id ), '$comment_id parameter is not a string.' );
+
+               return $comment_author;
+       }
+
+       public function test_comment_author_passes_correct_comment_id_for_comment_object() {
+               add_filter( 'get_comment_author', array( $this, 'get_comment_author_filter' ), 99, 3 );
+
+               get_comment_author( self::$comment );
+       }
+
+       public function test_comment_author_passes_correct_comment_id_for_int() {
+               add_filter( 'get_comment_author', array( $this, 'get_comment_author_filter' ), 99, 3 );
+
+               get_comment_author( (int) self::$comment->comment_ID );
+       }
+
+       public function get_comment_author_filter_non_existent_id( $comment_author, $comment_id, $comment ) {
+               $this->assertSame( $comment_id, (string) self::$non_existent_comment_id, 'Comment IDs do not match.' );
+               $this->assertTrue( is_string( $comment_id ), '$comment_id parameter is not a string.' );
+
+               return $comment_author;
+       }
+
+       /**
+        * @ticket 60475
+        */
+       public function test_comment_author_passes_correct_comment_id_for_non_existent_comment() {
+               add_filter( 'get_comment_author', array( $this, 'get_comment_author_filter_non_existent_id' ), 99, 3 );
+
+               self::$non_existent_comment_id = self::$comment->comment_ID + 1;
+
+               get_comment_author( self::$non_existent_comment_id ); // Non-existent comment ID.
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/comment/getCommentAuthor.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestscommentgetCommentAuthorEmailLinkphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/comment/getCommentAuthorEmailLink.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/comment/getCommentAuthorEmailLink.php   2024-06-04 14:50:24 UTC (rev 58334)
+++ trunk/tests/phpunit/tests/comment/getCommentAuthorEmailLink.php     2024-06-04 15:27:57 UTC (rev 58335)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5,6 +5,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @covers ::get_comment_author_email_link
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> class Tests_Comment_GetCommentAuthorEmailLink extends WP_UnitTestCase {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         public static $comment;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        public function set_up() {
</span></span></pre></div>
<a id="trunktestsphpunittestscommentgetCommentAuthorUrlphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/comment/getCommentAuthorUrl.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/comment/getCommentAuthorUrl.php 2024-06-04 14:50:24 UTC (rev 58334)
+++ trunk/tests/phpunit/tests/comment/getCommentAuthorUrl.php   2024-06-04 15:27:57 UTC (rev 58335)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6,26 +6,31 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @covers ::get_comment_author_url
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> class Tests_Comment_GetCommentAuthorUrl extends WP_UnitTestCase {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function get_comment_author_url_filter( $url, $id, $comment ) {
-               $this->assertSame( $id, $comment->comment_ID );
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                return $url;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ private static $comment;
+
+       public static function set_up_before_class() {
+               parent::set_up_before_class();
+
+               self::$comment = self::factory()->comment->create_and_get(
+                       array(
+                               'comment_post_ID' => 0,
+                       )
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        public function get_comment_author_url_filter( $comment_author_url, $comment_id, $comment ) {
+               $this->assertSame( $comment_id, $comment->comment_ID );
+
+               return $comment_author_url;
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         /**
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 41334
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_comment_author_url_passes_correct_comment_id() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $comment = self::factory()->comment->create_and_get(
-                       array(
-                               'comment_post_ID' => 0,
-                       )
-               );
-
</del><span class="cx" style="display: block; padding: 0 10px">                 add_filter( 'get_comment_author_url', array( $this, 'get_comment_author_url_filter' ), 99, 3 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                get_comment_author_url( $comment );
-
-               remove_filter( 'get_comment_author_url', array( $this, 'get_comment_author_url_filter' ), 99 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         get_comment_author_url( self::$comment );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunittestscommentgetCommentAuthorUrlLinkphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php     2024-06-04 14:50:24 UTC (rev 58334)
+++ trunk/tests/phpunit/tests/comment/getCommentAuthorUrlLink.php       2024-06-04 15:27:57 UTC (rev 58335)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6,6 +6,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @covers ::get_comment_author_url_link
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> class Tests_Comment_GetCommentAuthorUrlLink extends WP_UnitTestCase {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         protected static $comments = array();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
</span></span></pre>
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