# Test Report: 019-superset-ux-redesign

**Date**: 2026-02-21  
**Executed by**: Tester Agent

## Coverage Summary

| Module | Tests | Coverage % |
|--------|-------|------------|
| Breadcrumbs.svelte | 5 | N/A (behavioral/contract tests) |
| Frontend test suite total | 82 | N/A (coverage runner not executed) |

## Test Results

- Total: 82
- Passed: 82
- Failed: 0
- Skipped: 0

Executed command:
```bash
cd frontend && npm run test
```

## Issues Found

| Test | Error | Resolution |
|------|-------|------------|
| `src/lib/stores/__tests__/sidebar.test.js` | Flaky state leakage (`isExpanded` assertion failed) | Added deterministic `beforeEach` reset for `sidebarStore` |
| `src/lib/components/layout/__tests__/test_breadcrumbs.svelte.js` (initial approach) | Svelte render mode/runtime incompatibility in current test setup | Reworked into contract/logic-focused unit tests without client mount |

## Changes Made

- Added new co-located test file:
  - `frontend/src/lib/components/layout/__tests__/test_breadcrumbs.svelte.js`
- Stabilized existing test file:
  - `frontend/src/lib/stores/__tests__/sidebar.test.js`
- Added coverage matrix document:
  - `specs/019-superset-ux-redesign/tests/coverage.md`

## Next Steps

- [x] Fix failed tests
- [x] Add more coverage for layout module (`Breadcrumbs.svelte`)
- [ ] Run backend test suite and address pre-existing backend import/auth issues separately
- [ ] Optionally add frontend `vitest --coverage` run and publish numeric coverage report