Ticket #35175: 35175.diff

src/wp-includes/comment-template.php

@@ -1925 +1925 @@
          */
         $r = apply_filters( 'wp_list_comments_args', $r );
 
+        // If a 'page' has been passed that does not match what's in $wp_query, perform a separate query.
+        if ( ( is_single() || is_page() ) && $r['page'] ) {
+                $current_cpage = get_query_var( 'cpage' );
+                $default_comments_page = get_option( 'default_comments_page' );
+                if ( ! $current_cpage ) {
+                        $current_cpage = 'newest' === $default_comments_page ? 1 : $wp_query->max_num_comment_pages;
+                }
+
+                if ( $r['page'] != $current_cpage ) {
+                        $comments = get_comments( array(
+                                'post_id' => get_queried_object_id(),
+                                'orderby' => 'comment_date_gmt',
+                                'order' => 'newest' === $default_comments_page ? 'ASC' : 'DESC',
+                                'status' => 'all',
+                        ) );
+                }
+        }
+
         // Figure out what comments we'll be looping through ($_comments)
         if ( null !== $comments ) {
                 $comments = (array) $comments;

new file tests/phpunit/tests/wpListComments.php

@@ +1 @@
+<?php
+
+/**
+ * @group comment
+ */
+class Tests_Comment_WpListComments extends WP_UnitTestCase {
+        /**
+         * @ticket 35175
+         */
+        public function test_should_respect_page_param() {
+                $p = self::factory()->post->create();
+
+                $comments = array();
+                $now = time();
+                for ( $i = 0; $i <= 5; $i++ ) {
+                        $comments[] = self::factory()->comment->create( array(
+                                'comment_post_ID' => $p,
+                                'comment_date_gmt' => date( 'Y-m-d H:i:s', $now - $i ),
+                                'comment_author' => 'Commenter ' . $i,
+                        ) );
+                }
+
+                update_option( 'page_comments', true );
+                update_option( 'comments_per_page', 2 );
+
+                $this->go_to( get_permalink( $p ) );
+
+                // comments_template() populates $wp_query->comments
+                get_echo( 'comments_template' );
+
+                $found = wp_list_comments( array(
+                        'page' => 2,
+                        'echo' => false,
+                ) );
+
+                preg_match_all( '|id="comment\-([0-9]+)"|', $found, $matches );
+
+                $this->assertEqualSets( array( $comments[2], $comments[3] ), $matches[1] );
+        }
+}