Ticket #58824: 58824.diff

src/wp-admin/includes/class-wp-posts-list-table.php

@@ -640 +640 @@
 
                 $mode_class = esc_attr( 'table-view-' . $mode );
 
-                return array(
-                        'widefat',
-                        'fixed',
-                        'striped',
-                        $mode_class,
-                        is_post_type_hierarchical( $this->screen->post_type ) ? 'pages' : 'posts',
+                /**
+                 * Filters the CSS classes applied to the posts list table.
+                 *
+                 * @since 6.8.0
+                 *
+                 * @param string[] $classes   An array of CSS classes for the posts list table.
+                 * @param string   $post_type The post type slug.
+                 */
+                return apply_filters(
+                        'post_list_table_classes',
+                        array(
+                                'widefat',
+                                'fixed',
+                                'striped',
+                                $mode_class,
+                                is_post_type_hierarchical( $this->screen->post_type ) ? 'pages' : 'posts',
+                        ),
+                        $this->screen->post_type
                 );
         }
 

tests/phpunit/tests/admin/wpPostsListTable.php

@@ -309 +309 @@
                 $this->assertStringNotContainsString( 'id="delete_all"', $output );
         }
 
+        /**
+         * @ticket 58824
+         *
+         * @covers WP_Posts_List_Table::get_table_classes
+         */
+        public function test_get_table_classes_returns_default_classes() {
+                $method = new ReflectionMethod( $this->table, 'get_table_classes' );
+                $method->setAccessible( true );
+
+                $classes = $method->invoke( $this->table );
+
+                $this->assertContains( 'widefat', $classes );
+                $this->assertContains( 'fixed', $classes );
+                $this->assertContains( 'striped', $classes );
+                $this->assertContains( 'pages', $classes );
+        }
+
+        /**
+         * @ticket 58824
+         *
+         * @covers WP_Posts_List_Table::get_table_classes
+         */
+        public function test_get_table_classes_filter_modifies_classes() {
+                add_filter(
+                        'post_list_table_classes',
+                        static function ( $classes ) {
+                                $classes[] = 'my-custom-class';
+                                return $classes;
+                        }
+                );
+
+                $method = new ReflectionMethod( $this->table, 'get_table_classes' );
+                $method->setAccessible( true );
+
+                $classes = $method->invoke( $this->table );
+
+                remove_all_filters( 'post_list_table_classes' );
+
+                $this->assertContains( 'my-custom-class', $classes );
+        }
+
+        /**
+         * @ticket 58824
+         *
+         * @covers WP_Posts_List_Table::get_table_classes
+         */
+        public function test_get_table_classes_filter_receives_post_type() {
+                $received_post_type = null;
+
+                add_filter(
+                        'post_list_table_classes',
+                        static function ( $classes, $post_type ) use ( &$received_post_type ) {
+                                $received_post_type = $post_type;
+                                return $classes;
+                        },
+                        10,
+                        2
+                );
+
+                $method = new ReflectionMethod( $this->table, 'get_table_classes' );
+                $method->setAccessible( true );
+                $method->invoke( $this->table );
+
+                remove_all_filters( 'post_list_table_classes' );
+
+                $this->assertSame( 'page', $received_post_type );
+        }
+
         /**
          * @ticket 42066
          *