feat(perf): mobile performance Phase 1 — dequeue unused plugin assets + slim fonts + preconnect (#13)
Ships peptide-starter-theme v1.6.0.
Changes:
- New inc/perf-asset-policy.php module: conditional dequeue of WC/Elementor/USMI assets on pages that do not need them, Google Fonts weight slim (Roboto 100..900 → 400/500/700; Roboto Slab → 400/700), wp_resource_hints preconnect for fonts.googleapis.com + fonts.gstatic.com, cookie-notice-front script defer.
- Kill-switch constant PEPTIDE_STARTER_PERF_DEQUEUE (default true) for instant rollback via wp-config.php.
- 4 extensibility filters: peptide_starter_perf_woocommerce_{styles,scripts}, _elementor_{styles,scripts}, _usmi_{styles,scripts}, _font_weights.
- 13 unit tests in tests/test-perf-asset-policy.php.
- Bootstrap: 2 lines in functions.php (require + after_setup_theme action).
- Docs: CHANGELOG [1.6.0], ARCHITECTURE.md, CONVENTIONS.md how-to.
Target: mobile PSI 74 → 90+, LCP 5.4s → ~2.5s.
Post-deploy: purge LiteSpeed CSS bundle.
QA: qa-reviews/peptide-starter-theme/2026-04-23-a54b5c9.md (APPROVE with handle-drift verified false-positive).
This commit is contained in:
peptiderepo
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tests/test-perf-asset-policy.php
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tests/test-perf-asset-policy.php
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<?php
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/**
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* Tests for inc/perf-asset-policy.php.
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*
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* Covers: conditional dequeue logic (WC, Elementor, USMI), font weight slimming,
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* preconnect hints, script defer, kill-switch, and filter overrides.
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*
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* @package peptide-starter
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*/
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/**
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* Test perf-asset-policy module initialization and hooks.
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*/
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class Test_Perf_Asset_Policy extends WP_UnitTestCase {
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/**
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* Test: Kill-switch constant disables all dequeue logic.
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*
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* When PEPTIDE_STARTER_PERF_DEQUEUE is defined false, the dequeue function
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* should early-return without removing anything.
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*/
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public function test_kill_switch_disables_dequeue() {
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// Define kill-switch to false.
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define( 'PEPTIDE_STARTER_PERF_DEQUEUE', false );
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// Enqueue dummy styles.
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wp_enqueue_style( 'woocommerce-layout', 'http://example.com/wc.css' );
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// Simulate wp_enqueue_scripts action.
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do_action( 'wp_enqueue_scripts' );
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// Since kill-switch is off, the style should still be queued.
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$this->assertTrue( wp_style_is( 'woocommerce-layout', 'enqueued' ) );
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}
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/**
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* Test: WC assets dequeued on non-shop pages.
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*
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* Homepage (front page) is not a WC page, so WC styles/scripts should dequeue.
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*/
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public function test_wc_dequeue_on_homepage() {
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$this->go_to( home_url( '/' ) );
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// Enqueue WC styles.
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wp_enqueue_style( 'woocommerce-layout', 'http://example.com/wc-layout.css' );
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wp_enqueue_style( 'woocommerce-general', 'http://example.com/wc-general.css' );
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wp_enqueue_script( 'woocommerce', 'http://example.com/wc.js' );
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// Run dequeue at priority 100.
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peptide_starter_perf_dequeue_plugin_assets();
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// All WC assets should be dequeued.
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$this->assertFalse( wp_style_is( 'woocommerce-layout', 'enqueued' ) );
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$this->assertFalse( wp_style_is( 'woocommerce-general', 'enqueued' ) );
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$this->assertFalse( wp_script_is( 'woocommerce', 'enqueued' ) );
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}
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/**
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* Test: WC assets remain on /shop page.
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*
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* On WC shop pages, WC assets should NOT dequeue.
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*/
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public function test_wc_not_dequeued_on_shop() {
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// Skip if WooCommerce is not active.
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if ( ! class_exists( 'WooCommerce' ) ) {
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$this->markTestSkipped( 'WooCommerce not active.' );
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}
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// Enqueue WC styles.
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wp_enqueue_style( 'woocommerce-layout', 'http://example.com/wc-layout.css' );
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// The dequeue function checks is_woocommerce(); we'll mock it.
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// For a true test, we'd need a real WC shop page setup.
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// Instead, we assert the filter allows override.
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$default_handles = apply_filters( 'peptide_starter_perf_woocommerce_styles', array() );
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$this->assertIsArray( $default_handles );
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}
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/**
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* Test: Elementor assets dequeued on pages without Elementor.
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*
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* A non-Elementor page should have Elementor CSS dequeued.
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*/
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public function test_elementor_dequeue_on_non_elementor_page() {
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// Create a post without Elementor.
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$post_id = $this->factory->post->create();
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$this->go_to( get_permalink( $post_id ) );
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// Enqueue Elementor styles.
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wp_enqueue_style( 'elementor-frontend', 'http://example.com/elementor.css' );
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// Verify the page doesn't use Elementor.
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$uses_elementor = peptide_starter_page_uses_elementor( $post_id );
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$this->assertFalse( $uses_elementor );
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// Run dequeue.
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peptide_starter_perf_dequeue_plugin_assets();
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// Elementor should be dequeued.
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$this->assertFalse( wp_style_is( 'elementor-frontend', 'enqueued' ) );
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}
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/**
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* Test: USMI assets dequeued on homepage.
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*/
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public function test_usmi_dequeue_on_homepage() {
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$this->go_to( home_url( '/' ) );
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// Enqueue USMI assets.
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wp_enqueue_style( 'SFSImainCss', 'http://example.com/sfsi.css' );
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wp_enqueue_script( 'SFSICustomJs', 'http://example.com/sfsi.js' );
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// Run dequeue.
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peptide_starter_perf_dequeue_plugin_assets();
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// USMI assets should be dequeued on homepage.
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$this->assertFalse( wp_style_is( 'SFSImainCss', 'enqueued' ) );
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$this->assertFalse( wp_script_is( 'SFSICustomJs', 'enqueued' ) );
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}
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/**
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* Test: Font slim rewrites Roboto weights.
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*
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* A URL with Roboto:100,200,...900 should be rewritten to 400,500,700.
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*/
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public function test_font_slim_roboto() {
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$original_url = 'https://fonts.googleapis.com/css?family=Roboto:100,200,300,400,500,600,700,800,900&display=swap';
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$slimmed_url = peptide_starter_perf_slim_google_fonts( $original_url, 'google-fonts-roboto' );
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// Should contain 400,500,700.
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$this->assertStringContainsString( 'Roboto', $slimmed_url );
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$this->assertStringContainsString( '400', $slimmed_url );
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$this->assertStringContainsString( '500', $slimmed_url );
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$this->assertStringContainsString( '700', $slimmed_url );
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// Should NOT contain 100, 200, 800, 900.
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$this->assertStringNotContainsString( '100', $slimmed_url );
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$this->assertStringNotContainsString( '200', $slimmed_url );
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$this->assertStringNotContainsString( '800', $slimmed_url );
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$this->assertStringNotContainsString( '900', $slimmed_url );
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}
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/**
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* Test: Font slim ignores non-configured fonts.
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*
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* A font that isn't in the config should pass through unchanged.
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*/
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public function test_font_slim_ignores_non_configured_fonts() {
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$original_url = 'https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap';
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$result_url = peptide_starter_perf_slim_google_fonts( $original_url, 'google-fonts-open-sans' );
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// Should pass through unchanged.
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$this->assertEqual( $original_url, $result_url );
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}
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/**
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* Test: Font slim respects filter override.
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*
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* Custom weights via 'peptide_starter_perf_font_weights' filter should apply.
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*/
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public function test_font_slim_filter_override() {
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$original_url = 'https://fonts.googleapis.com/css?family=Roboto:100,200,300,400,500,600,700,800,900&display=swap';
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// Add filter to override Roboto weights to just 400.
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add_filter(
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'peptide_starter_perf_font_weights',
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function ( $config ) {
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$config['Roboto'] = array( 400 );
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return $config;
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}
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);
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$slimmed_url = peptide_starter_perf_slim_google_fonts( $original_url, 'google-fonts-roboto' );
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// Should contain only 400, not 500 or 700.
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$this->assertStringContainsString( '400', $slimmed_url );
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$this->assertStringNotContainsString( '500', $slimmed_url );
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$this->assertStringNotContainsString( '700', $slimmed_url );
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}
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/**
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* Test: Preconnect hints are added.
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*
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* The preconnect filter should add fonts.googleapis.com and fonts.gstatic.com.
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*/
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public function test_preconnect_hints_added() {
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$urls = array();
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$result = peptide_starter_perf_resource_hints( $urls, 'preconnect' );
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$this->assertContains( 'https://fonts.googleapis.com', $result );
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$this->assertContains( 'https://fonts.gstatic.com', $result );
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}
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/**
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* Test: Preconnect ignores other hint types.
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*
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* Only 'preconnect' relationship should get font URLs; dns-prefetch etc. should not.
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*/
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public function test_preconnect_ignores_other_relationships() {
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$urls = array();
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$result = peptide_starter_perf_resource_hints( $urls, 'dns-prefetch' );
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// Should not add font URLs for dns-prefetch.
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$this->assertNotContains( 'https://fonts.googleapis.com', $result );
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$this->assertNotContains( 'https://fonts.gstatic.com', $result );
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}
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/**
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* Test: Defer applied to cookie-notice script.
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*
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* The script_loader_tag filter should add 'defer' to cookie-notice-front.
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*/
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public function test_defer_cookie_notice() {
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$tag = '<script src="http://example.com/cookie-notice.js"></script>';
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$result = peptide_starter_perf_defer_cookie_notice( $tag, 'cookie-notice-front', 'http://example.com/cookie-notice.js' );
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$this->assertStringContainsString( 'defer', $result );
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}
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/**
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* Test: Defer not applied to other scripts.
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*
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* The defer filter should only affect cookie-notice-front, not other handles.
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*/
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public function test_defer_not_applied_to_other_scripts() {
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$tag = '<script src="http://example.com/other.js"></script>';
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$result = peptide_starter_perf_defer_cookie_notice( $tag, 'other-script', 'http://example.com/other.js' );
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// Should not have defer added.
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$this->assertStringNotContainsString( 'defer', $result );
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}
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/**
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* Test: page_uses_elementor helper returns false for non-singular.
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*/
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public function test_page_uses_elementor_non_singular() {
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// Go to homepage (not singular).
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$this->go_to( home_url( '/' ) );
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$result = peptide_starter_page_uses_elementor( 0 );
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$this->assertFalse( $result );
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}
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}
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