# Layout Test Failure Summary

## Quick Summary

**Status**: ❌ **TEST BLOCKED**
**Issue**: Visualization fails to load due to JSON parsing error
**Root Cause**: 6.3MB JSON file causes "SyntaxError: Unexpected EOF" in Safari browser

## What We Tried to Test

User reported initial view is HORIZONTAL instead of expected VERTICAL layout.

## What We Found

**Cannot test layout orientation** - the visualization never loads. Page stuck on "Loading graph data..." indefinitely.

## Critical Error

```
SyntaxError: Unexpected EOF
Location: Browser console (Safari)
File: chunk-graph.json (6.3MB)
```

## Screenshots

Evidence collected in `/tests/manual/screenshots/`:
- `initial_view_layout.png` - Shows loading state, no nodes rendered
- `console_check.png` - Shows SyntaxError in console
- `final_view.png` - Still loading after 2+ minutes
- `json_parse_test.png` - CORS test confirms fetch works but parsing fails

## Immediate Fix Needed

The 6.3MB JSON file is too large for browser JSON.parse(). Implement one of:

1. **Streaming JSON Load** (recommended)
   - Load in chunks with progress indicator
   - Parse incrementally

2. **Data Chunking**
   - Split into multiple smaller files
   - Load nodes separately from edges

3. **Server-Side Pagination**
   - Load only visible data
   - Fetch more as user navigates

## Impact

**All visualization testing is blocked** until this is fixed:
- ❌ Cannot verify layout orientation (vertical vs horizontal)
- ❌ Cannot test node interactions
- ❌ Cannot test navigation
- ❌ Cannot test any UI features

## Full Report

See: `/docs/research/visualization_layout_test_report.md`
