Changeset 61008 for trunk/tests/phpunit/tests/theme/wpEnqueueStoredStyles.php

Timestamp:

10/21/2025 05:59:38 AM (12 months ago)

Author:

westonruter

Message:

Script Loader: Load block styles on demand in classic themes via the template enhancement output buffer.

• This applies in classic themes when a site has not opted out of the template enhancement buffer by filtering wp_should_output_buffer_template_for_enhancement off.
• Both should_load_separate_core_block_assets and should_load_block_assets_on_demand are filtered on, as otherwise they are only enabled by default in block themes.
• Any style enqueued after wp_head and printed via print_late_styles() will get hoisted up to be inserted right after the wp-block-library inline style in the HEAD.
• The result is a >10% benchmarked improvement in LCP for core classic themes due to a ~100KB reduction in the amount of CSS unconditionally being served with every page load.

Developed in ​https://github.com/WordPress/wordpress-develop/pull/10288

Follow-up to [60936].

Props sjapaget, westonruter, peterwilsoncc, dmsnell, mindctrl.
See #43258.
Fixes #64099.

File:

• trunk/tests/phpunit/tests/theme/wpEnqueueStoredStyles.php (modified) (2 diffs)

trunk/tests/phpunit/tests/theme/wpEnqueueStoredStyles.php

@@ -11 +11 @@
  */
 class Tests_Themes_WpEnqueueStoredStyles extends WP_Theme_UnitTestCase {
+        /**
+         * @var WP_Scripts|null
+         */
+        protected $original_wp_scripts;
+
+        /**
+         * @var WP_Styles|null
+         */
+        protected $original_wp_styles;
+
+        public function set_up() {
+                parent::set_up();
+
+                global $wp_scripts, $wp_styles;
+                $this->original_wp_scripts = $wp_scripts;
+                $this->original_wp_styles  = $wp_styles;
+                $wp_scripts                = null;
+                $wp_styles                 = null;
+                wp_scripts();
+                wp_styles();
+        }
+
+        public function tear_down() {
+                global $wp_scripts, $wp_styles;
+                $wp_scripts = $this->original_wp_scripts;
+                $wp_styles  = $this->original_wp_styles;
+
+                parent::tear_down();
+        }
 
         /**
@@ -16 +45 @@
          *
          * @ticket 56467
+         *
+         * @covers ::wp_style_engine_get_stylesheet_from_css_rules
+         * @covers ::wp_enqueue_stored_styles
          */
         public function test_should_enqueue_stored_styles() {