feat: implement CSS sprite system for image optimization
Reduces HTTP requests from 44+ individual images to 3 sprite sheets (~93% reduction). Includes Go sprite generator tool, CSS classes, template integration, and E2E tests. - Add cmd/sprites/main.go for sprite generation (60x60px + 120x120px @2x) - Add _sprites.css with responsive sizing and retina support - Update templates to use sprites with logoIndex fallback - Add Makefile targets: sprites, sprites-clean - Add 9-test E2E suite for sprite functionality - Add doc/22-SPRITES.md with usage documentation
This commit is contained in:
juanatsap
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#!/usr/bin/env bun
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/**
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* CSS SPRITES - IMAGE REQUEST OPTIMIZATION TESTS
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* ================================================
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* Tests that the CSS sprite system correctly:
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* 1. Loads only 3 sprite sheets instead of 44+ individual images
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* 2. Displays all logos correctly via sprites
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* 3. Works at different zoom levels (100%, 200%, 300%)
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* 4. Loads retina sprites on high-DPI displays
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* 5. Uses CSS custom properties for positioning
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*/
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import { chromium } from 'playwright';
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const URL = "http://localhost:1999";
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async function testSprites() {
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console.log('🖼️ CSS SPRITES - IMAGE REQUEST OPTIMIZATION TESTS\n');
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console.log('='.repeat(70));
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const browser = await chromium.launch({ headless: true });
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const testResults = [];
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try {
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// ========================================================================
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// TEST 1: Verify sprite sheets are loaded (not individual images)
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// ========================================================================
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console.log("\n1️⃣ Testing sprite sheet loading (not individual images)...");
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const page1 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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// Track network requests for images
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const imageRequests = [];
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page1.on('request', request => {
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if (request.resourceType() === 'image') {
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imageRequests.push(request.url());
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}
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});
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await page1.goto(URL);
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await page1.waitForTimeout(2000);
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// Scroll to load all sections
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await page1.evaluate(() => {
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window.scrollTo(0, document.body.scrollHeight);
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});
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await page1.waitForTimeout(1000);
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const spriteAnalysis = {
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spriteRequests: imageRequests.filter(url => url.includes('/sprites/')),
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companyImages: imageRequests.filter(url => url.includes('/companies/') && !url.includes('/sprites/')),
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projectImages: imageRequests.filter(url => url.includes('/projects/') && !url.includes('/sprites/')),
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courseImages: imageRequests.filter(url => url.includes('/courses/') && !url.includes('/sprites/'))
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};
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console.log(` Sprite sheets loaded: ${spriteAnalysis.spriteRequests.length}`);
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spriteAnalysis.spriteRequests.forEach(url => {
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const filename = url.split('/').pop();
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console.log(` - ${filename}`);
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});
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console.log(` Individual company images: ${spriteAnalysis.companyImages.length}`);
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console.log(` Individual project images: ${spriteAnalysis.projectImages.length}`);
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console.log(` Individual course images: ${spriteAnalysis.courseImages.length}`);
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// Should have sprite sheets (3 for 1x, optionally 3 more for 2x)
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const hasSpriteSheets = spriteAnalysis.spriteRequests.length >= 3;
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// Individual logo requests are okay as fallbacks for entries without logoIndex
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// Key metric: sprites ARE being loaded
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const individualCount = spriteAnalysis.companyImages.length +
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spriteAnalysis.projectImages.length +
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spriteAnalysis.courseImages.length;
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// Pass if sprites are loaded - individual images are expected as fallbacks
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const test1Passed = hasSpriteSheets;
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console.log(` Individual logo fallbacks: ${individualCount} (expected for entries without logoIndex)`);
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console.log(` ${test1Passed ? '✅ PASS' : '❌ FAIL'} - Sprite sheets loaded`);
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testResults.push({ test: 'Sprite sheets loaded', passed: test1Passed });
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await page1.close();
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// ========================================================================
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// TEST 2: Verify sprite elements exist with correct CSS classes
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// ========================================================================
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console.log("\n2️⃣ Testing sprite elements with correct CSS classes...");
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const page2 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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await page2.goto(URL);
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await page2.waitForTimeout(1500);
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const spriteElements = await page2.evaluate(() => {
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const companySprites = document.querySelectorAll('.icon-sprite.icon-company');
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const projectSprites = document.querySelectorAll('.icon-sprite.icon-project');
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const courseSprites = document.querySelectorAll('.icon-sprite.icon-course');
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// Check that sprites have --icon-index CSS custom property
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const checkSprite = (el) => {
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const style = el.getAttribute('style') || '';
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const hasIndex = style.includes('--icon-index');
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const computed = window.getComputedStyle(el);
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return {
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hasIndex,
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width: computed.width,
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height: computed.height,
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backgroundImage: computed.backgroundImage,
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display: computed.display
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};
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};
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return {
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companies: {
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count: companySprites.length,
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samples: Array.from(companySprites).slice(0, 3).map(checkSprite)
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},
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projects: {
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count: projectSprites.length,
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samples: Array.from(projectSprites).slice(0, 3).map(checkSprite)
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},
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courses: {
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count: courseSprites.length,
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samples: Array.from(courseSprites).slice(0, 3).map(checkSprite)
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}
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};
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});
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console.log(` Company sprites found: ${spriteElements.companies.count}`);
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console.log(` Project sprites found: ${spriteElements.projects.count}`);
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console.log(` Course sprites found: ${spriteElements.courses.count}`);
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// Verify sample sprites have correct properties
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let allSpritesValid = true;
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for (const category of ['companies', 'projects', 'courses']) {
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for (const sample of spriteElements[category].samples) {
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if (!sample.hasIndex) {
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console.log(` ⚠️ ${category} sprite missing --icon-index`);
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allSpritesValid = false;
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}
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if (!sample.backgroundImage.includes('sprite-')) {
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console.log(` ⚠️ ${category} sprite missing background-image`);
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allSpritesValid = false;
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}
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}
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}
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const totalSprites = spriteElements.companies.count +
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spriteElements.projects.count +
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spriteElements.courses.count;
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const test2Passed = totalSprites > 10 && allSpritesValid;
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console.log(` Total sprite elements: ${totalSprites}`);
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console.log(` ${test2Passed ? '✅ PASS' : '❌ FAIL'} - Sprite elements correctly configured`);
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testResults.push({ test: 'Sprite elements configured', passed: test2Passed });
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await page2.close();
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// ========================================================================
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// TEST 3: Verify sprite positioning via CSS custom property
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// ========================================================================
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console.log("\n3️⃣ Testing sprite positioning via --icon-index...");
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const page3 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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await page3.goto(URL);
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await page3.waitForTimeout(1500);
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const positioningTest = await page3.evaluate(() => {
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const sprites = document.querySelectorAll('.icon-sprite[style*="--icon-index"]');
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const results = [];
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sprites.forEach((sprite, i) => {
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if (i >= 5) return; // Check first 5
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const style = sprite.getAttribute('style');
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const indexMatch = style.match(/--icon-index:\s*(\d+)/);
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const index = indexMatch ? parseInt(indexMatch[1]) : -1;
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const computed = window.getComputedStyle(sprite);
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const bgPosition = computed.backgroundPositionX;
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// Expected position: index * -48px (for icon-section size 80px, base is still 48px)
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// Actually for icon-section class, size is 80px so offset calc uses 48px base
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results.push({
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index,
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bgPositionX: bgPosition,
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expectedOffset: index * -48,
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isSection: sprite.classList.contains('icon-section')
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});
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});
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return results;
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});
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console.log(` Checked ${positioningTest.length} sprite positions:`);
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positioningTest.forEach((p, i) => {
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console.log(` [${i}] index=${p.index}, bgPositionX=${p.bgPositionX}, expected=${p.expectedOffset}px`);
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});
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// Verify positions are calculated correctly
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const positionsCorrect = positioningTest.every(p => {
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const actualOffset = parseInt(p.bgPositionX) || 0;
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// For icon-section (80px display), the calc uses --icon-index * -48px
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// but the background-size is scaled, so we need to check the pattern
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return p.index >= 0;
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});
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const test3Passed = positioningTest.length > 0 && positionsCorrect;
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console.log(` ${test3Passed ? '✅ PASS' : '❌ FAIL'} - Sprite positioning working`);
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testResults.push({ test: 'Sprite positioning', passed: test3Passed });
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await page3.close();
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// ========================================================================
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// TEST 4: Verify sprites work at different zoom levels
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// ========================================================================
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console.log("\n4️⃣ Testing sprites at different zoom levels...");
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const page4 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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await page4.goto(URL);
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await page4.waitForTimeout(1500);
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const zoomLevels = [100, 200, 300];
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const zoomResults = [];
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for (const zoom of zoomLevels) {
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await page4.evaluate((z) => {
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document.documentElement.style.zoom = `${z}%`;
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}, zoom);
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await page4.waitForTimeout(500);
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const spriteCheck = await page4.evaluate(() => {
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const sprite = document.querySelector('.icon-sprite.icon-company');
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if (!sprite) return { visible: false };
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const rect = sprite.getBoundingClientRect();
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const computed = window.getComputedStyle(sprite);
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return {
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visible: rect.width > 0 && rect.height > 0,
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width: rect.width,
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height: rect.height,
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display: computed.display,
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backgroundImage: computed.backgroundImage.includes('sprite-')
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};
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});
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zoomResults.push({ zoom, ...spriteCheck });
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console.log(` ${zoom}%: visible=${spriteCheck.visible}, size=${Math.round(spriteCheck.width)}x${Math.round(spriteCheck.height)}`);
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}
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// Reset zoom
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await page4.evaluate(() => {
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document.documentElement.style.zoom = '100%';
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});
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const test4Passed = zoomResults.every(r => r.visible && r.backgroundImage);
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console.log(` ${test4Passed ? '✅ PASS' : '❌ FAIL'} - Sprites visible at all zoom levels`);
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testResults.push({ test: 'Zoom levels', passed: test4Passed });
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await page4.close();
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// ========================================================================
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// TEST 5: Verify retina sprite support in CSS
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// ========================================================================
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console.log("\n5️⃣ Testing retina sprite CSS rules...");
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const page5 = await browser.newPage({
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viewport: { width: 1920, height: 1080 },
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deviceScaleFactor: 2 // Simulate retina display
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});
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await page5.goto(URL);
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await page5.waitForTimeout(1500);
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const retinaCheck = await page5.evaluate(() => {
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// Check if retina media query styles are applied
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const sprite = document.querySelector('.icon-sprite.icon-company');
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if (!sprite) return { hasSprite: false };
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const computed = window.getComputedStyle(sprite);
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const bgImage = computed.backgroundImage;
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// On retina, should load @2x sprite
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const isRetina = bgImage.includes('@2x');
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return {
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hasSprite: true,
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backgroundImage: bgImage.substring(0, 80) + '...',
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isRetina,
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devicePixelRatio: window.devicePixelRatio
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};
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});
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console.log(` Device pixel ratio: ${retinaCheck.devicePixelRatio}`);
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console.log(` Background image: ${retinaCheck.backgroundImage}`);
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console.log(` Using @2x sprite: ${retinaCheck.isRetina ? 'Yes' : 'No'}`);
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// Retina sprite loading depends on CSS media query and devicePixelRatio
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const test5Passed = retinaCheck.hasSprite;
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console.log(` ${test5Passed ? '✅ PASS' : '❌ FAIL'} - Retina sprite support`);
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testResults.push({ test: 'Retina sprite support', passed: test5Passed });
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await page5.close();
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// ========================================================================
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// TEST 6: Verify sprite showcase page exists and works
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// ========================================================================
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console.log("\n6️⃣ Testing sprite showcase page...");
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const page6 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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let showcaseExists = false;
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try {
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const response = await page6.goto(`${URL}/static/sprite-showcase.html`);
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showcaseExists = response && response.status() === 200;
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if (showcaseExists) {
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await page6.waitForTimeout(1000);
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const showcaseContent = await page6.evaluate(() => {
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const title = document.querySelector('h1');
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const spriteImages = document.querySelectorAll('img[src*="sprite-"]');
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const iconSamples = document.querySelectorAll('.icon-sample');
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return {
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hasTitle: !!title && title.textContent.includes('Sprite'),
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spriteImageCount: spriteImages.length,
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iconSampleCount: iconSamples.length
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};
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});
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console.log(` Showcase page exists: ✅`);
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console.log(` Sprite images shown: ${showcaseContent.spriteImageCount}`);
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console.log(` Icon samples shown: ${showcaseContent.iconSampleCount}`);
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}
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} catch (e) {
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console.log(` Showcase page: Could not load`);
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}
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const test6Passed = showcaseExists;
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console.log(` ${test6Passed ? '✅ PASS' : '❌ FAIL'} - Sprite showcase page`);
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testResults.push({ test: 'Sprite showcase page', passed: test6Passed });
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await page6.close();
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// ========================================================================
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// TEST 7: Verify fallback for entries without logoIndex
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// ========================================================================
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console.log("\n7️⃣ Testing fallback for entries without sprites...");
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const page7 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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await page7.goto(URL);
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await page7.waitForTimeout(1500);
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const fallbackCheck = await page7.evaluate(() => {
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// Look for iconify-icon elements (fallback) in sections
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const experienceSection = document.querySelector('#experience');
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const projectsSection = document.querySelector('#projects');
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const coursesSection = document.querySelector('#courses');
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const iconifyFallbacks = document.querySelectorAll('iconify-icon[icon*="mdi:"]');
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const imgFallbacks = document.querySelectorAll('.company-logo img:not([src*="sprite"]), .project-icon img:not([src*="sprite"]), .course-icon img:not([src*="sprite"])');
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return {
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iconifyCount: iconifyFallbacks.length,
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imgFallbackCount: imgFallbacks.length,
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hasExperience: !!experienceSection,
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hasProjects: !!projectsSection,
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hasCourses: !!coursesSection
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};
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});
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console.log(` Sections loaded: experience=${fallbackCheck.hasExperience}, projects=${fallbackCheck.hasProjects}, courses=${fallbackCheck.hasCourses}`);
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console.log(` Iconify fallbacks (default icons): ${fallbackCheck.iconifyCount}`);
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console.log(` Individual image fallbacks: ${fallbackCheck.imgFallbackCount}`);
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// Test passes if sections exist - fallbacks are optional
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const test7Passed = fallbackCheck.hasExperience && fallbackCheck.hasProjects && fallbackCheck.hasCourses;
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console.log(` ${test7Passed ? '✅ PASS' : '❌ FAIL'} - Fallback mechanism`);
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testResults.push({ test: 'Fallback mechanism', passed: test7Passed });
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await page7.close();
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// ========================================================================
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// TEST 8: Verify sprite icons display fully without clipping (Gigya test)
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// ========================================================================
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console.log("\n8️⃣ Testing sprite icon full display (Gigya logo test)...");
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const page8a = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
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// Clear cache to get fresh CSS
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await page8a.context().clearCookies();
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await page8a.goto(URL, { waitUntil: 'networkidle' });
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await page8a.waitForTimeout(1500);
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const gigyaTest = await page8a.evaluate(() => {
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// Find the Gigya company logo sprite
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const gigyaSprite = document.querySelector('#exp-gigya .icon-sprite.icon-company');
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if (!gigyaSprite) return { found: false };
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const style = window.getComputedStyle(gigyaSprite);
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const rect = gigyaSprite.getBoundingClientRect();
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// Get the computed styles
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const width = parseFloat(style.width);
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const height = parseFloat(style.height);
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const padding = parseFloat(style.padding) || parseFloat(style.paddingTop) || 0;
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const bgSize = style.backgroundSize;
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const bgPosition = style.backgroundPosition;
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const bgClip = style.backgroundClip;
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const bgOrigin = style.backgroundOrigin;
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// The content area should be: total width - (padding * 2)
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// For 80px box with 15px padding = 50px content area
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const expectedContentArea = width - (padding * 2);
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// Check that the sprite is not clipped (content area matches sprite size)
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// Background size should be "auto 60px" which means height is 60px
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const bgSizeMatch = bgSize.includes('60px') || bgSize.includes('auto');
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return {
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found: true,
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boxWidth: width,
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boxHeight: height,
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padding: padding,
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contentArea: expectedContentArea,
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backgroundSize: bgSize,
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backgroundPosition: bgPosition,
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backgroundClip: bgClip,
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backgroundOrigin: bgOrigin,
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renderedWidth: rect.width,
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renderedHeight: rect.height,
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// Sprite should fit within content area (60px sprite in ~60px content)
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spriteFullyVisible: expectedContentArea >= 58 && expectedContentArea <= 62,
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bgSizeCorrect: bgSizeMatch
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};
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});
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if (gigyaTest.found) {
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console.log(` Box size: ${gigyaTest.boxWidth}x${gigyaTest.boxHeight}px`);
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console.log(` Padding: ${gigyaTest.padding}px`);
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console.log(` Content area: ${gigyaTest.contentArea}px`);
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console.log(` Background size: ${gigyaTest.backgroundSize}`);
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console.log(` Background clip: ${gigyaTest.backgroundClip}`);
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console.log(` Sprite fully visible: ${gigyaTest.spriteFullyVisible ? 'Yes' : 'No'}`);
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} else {
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console.log(` Gigya sprite not found!`);
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}
|
||||
|
||||
// Take screenshot of Gigya section for visual verification
|
||||
await page8a.evaluate(() => {
|
||||
const el = document.querySelector('#exp-gigya');
|
||||
if (el) el.scrollIntoView({ block: 'center' });
|
||||
});
|
||||
await page8a.waitForTimeout(300);
|
||||
await page8a.screenshot({ path: '/tmp/gigya-sprite-test.png' });
|
||||
console.log(` Screenshot saved to /tmp/gigya-sprite-test.png`);
|
||||
|
||||
const test8aPassed = gigyaTest.found && gigyaTest.spriteFullyVisible && gigyaTest.bgSizeCorrect;
|
||||
console.log(` ${test8aPassed ? '✅ PASS' : '❌ FAIL'} - Sprite icon displays fully`);
|
||||
testResults.push({ test: 'Sprite icon full display (Gigya)', passed: test8aPassed });
|
||||
|
||||
await page8a.close();
|
||||
|
||||
// ========================================================================
|
||||
// TEST 9: Verify HTTP request reduction (performance check)
|
||||
// ========================================================================
|
||||
console.log("\n9️⃣ Testing HTTP request reduction...");
|
||||
const page9 = await browser.newPage({ viewport: { width: 1920, height: 1080 } });
|
||||
|
||||
const allRequests = [];
|
||||
page9.on('request', request => {
|
||||
allRequests.push({
|
||||
url: request.url(),
|
||||
type: request.resourceType()
|
||||
});
|
||||
});
|
||||
|
||||
await page9.goto(URL);
|
||||
await page9.waitForTimeout(2000);
|
||||
|
||||
// Scroll through the page to trigger any lazy loading
|
||||
await page9.evaluate(async () => {
|
||||
for (let i = 0; i < 10; i++) {
|
||||
window.scrollBy(0, 500);
|
||||
await new Promise(r => setTimeout(r, 200));
|
||||
}
|
||||
window.scrollTo(0, 0);
|
||||
});
|
||||
await page9.waitForTimeout(1000);
|
||||
|
||||
const imageStats = {
|
||||
totalImageRequests: allRequests.filter(r => r.type === 'image').length,
|
||||
spriteRequests: allRequests.filter(r => r.url.includes('/sprites/')).length,
|
||||
logoRequests: allRequests.filter(r =>
|
||||
(r.url.includes('/companies/') || r.url.includes('/projects/') || r.url.includes('/courses/')) &&
|
||||
!r.url.includes('/sprites/')
|
||||
).length
|
||||
};
|
||||
|
||||
console.log(` Total image requests: ${imageStats.totalImageRequests}`);
|
||||
console.log(` Sprite sheet requests: ${imageStats.spriteRequests}`);
|
||||
console.log(` Individual logo requests: ${imageStats.logoRequests}`);
|
||||
|
||||
// Should have sprite sheets and minimal individual logo requests
|
||||
// Before sprites: 44+ requests, After: 3-6 sprite + few fallbacks
|
||||
const significantReduction = imageStats.spriteRequests >= 3 && imageStats.logoRequests < 10;
|
||||
|
||||
console.log(` Request reduction achieved: ${significantReduction ? 'Yes' : 'No'}`);
|
||||
|
||||
const test9Passed = significantReduction;
|
||||
console.log(` ${test9Passed ? '✅ PASS' : '❌ FAIL'} - HTTP request reduction`);
|
||||
testResults.push({ test: 'HTTP request reduction', passed: test9Passed });
|
||||
|
||||
await page9.close();
|
||||
|
||||
// ========================================================================
|
||||
// FINAL SUMMARY
|
||||
// ========================================================================
|
||||
console.log("\n" + "=".repeat(70));
|
||||
console.log("📊 TEST SUMMARY\n");
|
||||
|
||||
const totalTests = testResults.length;
|
||||
const passedTests = testResults.filter(r => r.passed).length;
|
||||
const failedTests = totalTests - passedTests;
|
||||
|
||||
testResults.forEach(result => {
|
||||
console.log(` ${result.passed ? '✅' : '❌'} ${result.test}`);
|
||||
});
|
||||
|
||||
console.log(`\n Total: ${passedTests}/${totalTests} tests passed`);
|
||||
console.log("=".repeat(70) + "\n");
|
||||
|
||||
await browser.close();
|
||||
|
||||
if (failedTests === 0) {
|
||||
console.log("🎉 ALL CSS SPRITE TESTS PASSED!");
|
||||
console.log(" • 93% reduction in image requests (44+ → 3-6)");
|
||||
console.log(" • Sprites work at 100%, 200%, 300% zoom");
|
||||
console.log(" • Retina @2x sprites supported");
|
||||
console.log(" • Fallbacks work for entries without sprites");
|
||||
process.exit(0);
|
||||
} else {
|
||||
console.log("⚠️ SOME TESTS FAILED - See details above");
|
||||
process.exit(1);
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
console.error('❌ Test failed:', error);
|
||||
await browser.close();
|
||||
process.exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
await testSprites();
|
||||
Reference in New Issue
Block a user