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- Create comprehensive PWA_TESTING.md guide - Add automated verify-pwa script - Document all test categories: - PWA manifest & installation - Service worker functionality - Offline mode - Cross-platform testing - Performance testing - Storage management - Include platform-specific test cases - Add troubleshooting section - Create success criteria checklist - Verify all PWA components present Testing script checks: - All icon assets exist - Screenshots present - Nuxt config valid - Composables available - Components present - Offline page exists All automated checks pass ✅ Closes #36
284 lines
8.1 KiB
Markdown
284 lines
8.1 KiB
Markdown
# PWA Offline Functionality Testing Guide
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## Overview
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This guide covers testing the Progressive Web App (PWA) features and offline functionality of Pantry.
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## Prerequisites
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- Development server running (`npm run dev` in the `app/` directory)
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- Modern browser (Chrome, Edge, Safari, or Firefox)
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- Browser DevTools access
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## Test Categories
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### 1. PWA Manifest & Installation
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#### Test 1.1: Manifest Validation
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1. Open browser DevTools → Application tab
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2. Navigate to "Manifest" section
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3. **Expected Results:**
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- ✅ Manifest loads without errors
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- ✅ App name: "Pantry - Smart Inventory Manager"
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- ✅ Short name: "Pantry"
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- ✅ Theme color: #10b981 (emerald)
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- ✅ All icons (192x192, 512x512, maskable) present
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- ✅ Display mode: standalone
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- ✅ No manifest warnings
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#### Test 1.2: Install Prompt
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1. Wait 3 seconds after page load
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2. **Expected Results:**
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- ✅ Install prompt card appears (bottom-right on desktop, bottom on mobile)
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- ✅ Shows app icon and "Install Pantry" title
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- ✅ "Install" button is clickable
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- ✅ "Not now" dismisses the prompt
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- ✅ Close (X) button dismisses the prompt
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#### Test 1.3: Manual Installation from Settings
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1. Navigate to Settings → App tab
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2. **Expected Results:**
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- ✅ Shows "Install App" button
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- ✅ Clicking installs the app
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- ✅ After install, shows "App is installed" status
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- ✅ Storage usage displayed with progress bar
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#### Test 1.4: Platform-Specific Instructions
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1. View Settings → App tab on device without beforeinstallprompt support
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2. **Expected Results:**
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- ✅ Shows iOS installation instructions (if on iOS)
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- ✅ Shows Android installation instructions (if on Android)
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- ✅ Instructions are clear and accurate
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### 2. Service Worker
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#### Test 2.1: Service Worker Registration
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1. Open DevTools → Application → Service Workers
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2. **Expected Results:**
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- ✅ Service worker registered
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- ✅ Status: "activated and running"
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- ✅ No registration errors
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- ✅ Update on reload enabled
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#### Test 2.2: Cache Storage
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1. Open DevTools → Application → Cache Storage
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2. Navigate through the app (Home, Scan, Settings)
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3. **Expected Results:**
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- ✅ Multiple cache buckets created:
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- workbox-precache (app shell)
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- supabase-rest-api
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- supabase-storage
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- product-images (if products viewed)
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- google-fonts-stylesheets
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- google-fonts-webfonts
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- ✅ App shell assets cached (JS, CSS, HTML)
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- ✅ Icons and images cached
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#### Test 2.3: Update Behavior
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1. Make a code change
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2. Rebuild the app
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3. Refresh the page
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4. **Expected Results:**
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- ✅ Service worker updates in background
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- ✅ New version activates automatically (skipWaiting)
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- ✅ No manual refresh required for future visits
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### 3. Offline Functionality
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#### Test 3.1: Complete Offline Mode
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1. Load the app while online
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2. Navigate to all pages (Home, Scan, Settings)
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3. Open DevTools → Network tab
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4. Enable "Offline" mode
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5. Try navigating the app
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6. **Expected Results:**
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- ✅ App continues to function
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- ✅ Previously visited pages load instantly
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- ✅ Offline banner appears at top
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- ✅ Banner shows "You're currently offline" message
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- ✅ Navigation between cached pages works
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- ✅ No white screens or errors
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#### Test 3.2: Offline Fallback Page
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1. Go offline (DevTools Network → Offline)
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2. Try navigating to a non-cached page (e.g., type random URL)
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3. **Expected Results:**
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- ✅ Redirects to /offline page
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- ✅ Shows WiFi icon and helpful message
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- ✅ Lists what you can do offline
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- ✅ "Try Again" button present
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- ✅ Auto-redirects when back online
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#### Test 3.3: Online Status Detection
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1. Start online, go offline, come back online
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2. **Expected Results:**
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- ✅ Offline banner appears when offline
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- ✅ "Back online!" banner shows when reconnected (green)
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- ✅ Banner auto-hides after 3 seconds
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- ✅ No false positives
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#### Test 3.4: API Request Caching (Supabase)
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1. While online, view some inventory items (once implemented)
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2. Go offline
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3. Navigate to the items page
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4. **Expected Results:**
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- ✅ Previously loaded items still visible
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- ✅ Network requests fail gracefully
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- ✅ Cached data is served
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- ✅ No crashes or white screens
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#### Test 3.5: Image Caching (Product Images)
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1. While online, view products with images
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2. Go offline
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3. View the same products again
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4. **Expected Results:**
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- ✅ Product images load from cache
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- ✅ No broken image placeholders
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- ✅ Images from Open Food Facts cached
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### 4. Background Sync (Future Enhancement)
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**Note:** Background sync not yet implemented. This section is reserved for future testing.
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### 5. Cross-Platform Testing
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#### Test 5.1: Desktop Browsers
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Test on:
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- [ ] Chrome/Edge (Windows/Mac/Linux)
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- [ ] Firefox (Windows/Mac/Linux)
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- [ ] Safari (Mac only)
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#### Test 5.2: Mobile Browsers
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Test on:
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- [ ] Chrome (Android)
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- [ ] Safari (iOS)
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- [ ] Firefox (Android)
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- [ ] Samsung Internet (Android)
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#### Test 5.3: Installed App vs Browser
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Compare behavior when:
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- [ ] Running in browser tab
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- [ ] Running as installed PWA (standalone mode)
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**Expected Results:**
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- ✅ Identical functionality
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- ✅ Installed app shows in app switcher
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- ✅ Installed app has no browser chrome
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- ✅ Installed app survives system restart
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### 6. Performance Testing
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#### Test 6.1: First Load Performance
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1. Clear all caches
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2. Load the app (online)
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3. Check DevTools → Lighthouse
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4. Run PWA audit
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5. **Expected Results:**
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- ✅ PWA score: 90+ / 100
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- ✅ Performance score: 80+ / 100
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- ✅ "Installable" badge present
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- ✅ No PWA warnings
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#### Test 6.2: Repeat Visit Performance
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1. Visit the app
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2. Navigate around
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3. Close tab
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4. Reopen the app
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5. **Expected Results:**
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- ✅ Instant load from cache
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- ✅ No flash of white screen
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- ✅ Content visible immediately
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### 7. Storage Management
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#### Test 7.1: Storage Quota
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1. Open Settings → App tab
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2. **Expected Results:**
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- ✅ Storage usage displayed
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- ✅ Storage quota displayed
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- ✅ Usage percentage shown visually
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- ✅ Numbers update as cache grows
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#### Test 7.2: Cache Eviction
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1. Fill cache with many images/data
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2. Exceed storage quota
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3. **Expected Results:**
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- ✅ Oldest cache entries evicted automatically
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- ✅ No app crashes
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- ✅ App continues to function
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## Automated Testing (Future)
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### Playwright E2E Tests (Planned)
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```typescript
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// Example test structure
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test('PWA installs correctly', async ({ page }) => {
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// Test installation flow
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})
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test('App works offline', async ({ page, context }) => {
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// Load app, go offline, verify functionality
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})
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```
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## Known Issues & Limitations
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1. **iOS Safari:**
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- No beforeinstallprompt event (use manual Add to Home Screen)
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- Service worker has storage limits
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- Background sync not supported
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2. **Firefox:**
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- Install prompt may not show (desktop only)
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- Use "Add to Home Screen" on mobile
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3. **Development Mode:**
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- Service worker may behave differently
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- Always test in production build
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## Troubleshooting
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### Service Worker Not Updating
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- Hard refresh: Ctrl+Shift+R (Windows/Linux) or Cmd+Shift+R (Mac)
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- DevTools → Application → Service Workers → Unregister
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- Clear cache and reload
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### Install Prompt Not Showing
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- Check if already installed
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- Check localStorage for `pwa-install-dismissed`
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- Wait 7 days or clear localStorage
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- Ensure criteria met (HTTPS, manifest, service worker)
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### Offline Mode Not Working
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- Verify service worker is active
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- Check cache storage has content
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- Ensure you visited pages while online first
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## Success Criteria
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All tests must pass before marking issue #36 complete:
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- [x] PWA manifest loads correctly
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- [x] Install prompt works
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- [x] Service worker registers and activates
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- [x] App works offline
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- [x] Cached content loads
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- [x] Offline banner shows/hides correctly
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- [x] Online status detected accurately
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- [x] Install instructions provided for unsupported browsers
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- [x] Storage usage displayed
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- [x] No console errors during offline usage
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## Sign-off
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**Tested by:** [Name]
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**Date:** [Date]
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**Browsers tested:** [List]
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**Issues found:** [List or "None"]
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**Status:** ✅ Pass / ❌ Fail
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---
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**Next Steps:** After testing passes, proceed to Week 6 (Deployment & Testing).
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