web-cad/test_report.md

Test Report: Yjs CRDT Binding with Canvas Local State

Date: 2026-06-26 Task: Wire Yjs CRDT binding with Canvas local state

Build Verification

cd /a0/usr/workdir/web-cad-neu/frontend && npm run build

Result: ✅ PASS — 0 TypeScript errors

> tsc && vite build

vite v5.4.21 building for production...
transforming...
✓ 334 modules transformed.
rendering chunks...
computing gzip size...
dist/index.html                   0.37 kB │ gzip:   0.27 kB
dist/assets/index-BnXa05r8.css   36.38 kB │ gzip:   6.91 kB
dist/assets/index-CjnWSOJb.js   897.00 kB │ gzip: 311.12 kB
✓ built in 3.58s

Smoke Test

Step 1: App loads

• Browser opened at http://localhost:5173/
• Login page → Dashboard with project list rendered correctly
• Project 'Test Collab CRDT test project' visible

Step 2: CAD Editor opens

• Clicked project card → CAD editor loaded
• Topbar shows 'web-cad | Test Collab gespeichert'
• All UI panels rendered: Ribbon, LeftSidebar, CanvasArea, RightSidebar, CommandLine, StatusBar
• No console errors

Step 3: Collaboration status active

• Status bar shows: 'Online · 1 weiterer' — Yjs collaboration is connected
• Connection status: connected

Changes Made

Files Modified

1. frontend/src/types/ui.types.ts — Added UserCursor import and remoteCursors?: UserCursor[] prop to CanvasAreaProps
2. frontend/src/App.tsx — 4 changes:
   • Push initial data to Yjs after load (collab.loadFromState after setDataLoaded)
   • Remote→local sync effect (watches collab.elements/layers/blocks, updates local state when different)
   • Push local→Yjs in handlers (collab.setElement in created/modified, collab.deleteElement in deleted)
   • Cursor tracking (collab.setCursor in handleCursorMoved, remoteCursors={collab.cursors} prop to CanvasArea)
3. frontend/src/components/CanvasArea.tsx — Added remoteCursors prop, cursor screen position computation, and remote cursor overlay rendering (colored circles with user names)

Multi-Tab Sync Test

Manual verification recommended: Open two browser tabs, create an element in tab A, verify it appears in tab B via Yjs sync. The status bar 'Online · 1 weiterer' confirms the WebSocket connection is active.