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brachnha-insight/_bmad-output/test-design-epic-3.md
Max e9e6fadb1d fix: ChatBubble crash and DeepSeek API compatibility 
- Fix ChatBubble to handle non-string content with String() wrapper
- Fix API route to use generateText for non-streaming requests
- Add @ai-sdk/openai-compatible for non-OpenAI providers (DeepSeek, etc.)
- Use Chat Completions API instead of Responses API for compatible providers
- Update ChatBubble tests and fix component exports to kebab-case
- Remove stale PascalCase ChatBubble.tsx file
2026-01-26 16:55:05 +07:00

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Test Design: Epic 3 - "My Legacy" - History, Offline Sync & PWA Polish

Date: 2026-01-23 Author: Max Status: Approved

Executive Summary

Scope: Epic-level test design for Epic 3 covering Story 3.1 (History Feed), 3.2 (Deletion), 3.3 (Offline Sync), and 3.4 (PWA Install). Focus on data integrity, offline resilience, and PWA capabilities.

Risk Summary:

  • Total risks identified: 4
  • High-priority risks (≥6): 2
  • Critical categories: DATA, TECH

Coverage Summary:

  • P0 scenarios: 5 (10 hours)
  • P1 scenarios: 6 (6 hours)
  • P2/P3 scenarios: 4 (2 hours)
  • Total effort: 18 hours (~2.5 days)

Risk Assessment

High-Priority Risks (Score ≥6)

Risk ID Category Description Probability Impact Score Mitigation Owner Timeline
R-001 DATA Data loss during offline-to-online sync if queue fails 2 (Possible) 3 (Critical) 6 Implement "Action Replay" pattern with retry backoff and persistent queue in Dexie Dev/QA Story 3.3
R-002 DATA Deletion conflict (deleting item offline that changes online) 2 (Possible) 3 (Critical) 6 Optimistic UI updates + Soft delete markers + server reconciliation Dev Story 3.2

Medium-Priority Risks (Score 3-4)

Risk ID Category Description Probability Impact Score Mitigation Owner
R-003 PERF History feed lag with large dataset (>1000 items) 2 (Possible) 2 (Degraded) 4 Implement virtualization (react-window) and pagination Dev
R-004 TECH PWA Install Prompt not appearing on some browsers 2 (Possible) 2 (Degraded) 4 Fallback manual install instructions / comprehensive browser testing QA

Low-Priority Risks (Score 1-2)

Risk ID Category Description Probability Impact Score Action
R-005 SEC Local storage scrutiny (physical access required) 1 (Unlikely) 2 (Degraded) 2 Monitor

Risk Category Legend

  • TECH: Technical/Architecture
  • SEC: Security
  • PERF: Performance
  • DATA: Data Integrity
  • BUS: Business Impact
  • OPS: Operations

Test Coverage Plan

P0 (Critical) - Run on every commit

Criteria: Blocks core journey + High risk (≥6) + No workaround

Requirement Test Level Risk Link Test Count Owner Notes
Offline Action Queueing Integration R-001 3 Dev Verify actions added to queue when network disconnected
Sync Action Replay Integration R-001 2 Dev Verify queue processes successfully upon reconnection
Entry Deletion Component R-002 1 Dev Verify delete dialog and optimistic removal
Deletion Persistence Integration R-002 1 Dev Verify deletion persists to DB
Initial Load (Empty State) E2E - 1 QA Verify app loads correctly for new users

Total P0: 8 tests, 5 hours

P1 (High) - Run on PR to main

Criteria: Important features + Medium risk (3-4) + Common workflows

Requirement Test Level Risk Link Test Count Owner Notes
History Feed Rendering Component R-003 2 Dev Verify list renders with mock data
PWA Manifest Validity Unit/Int R-004 1 Dev Verify manifest.json served correctly
Install Prompt Trigger Component R-004 1 Dev Verify prompt appears on 'beforeinstallprompt' event
Pagination/Load More Integration R-003 1 Dev Verify loading more items works

Total P1: 5 tests, 3 hours

P2 (Medium) - Run nightly/weekly

Criteria: Secondary features + Low risk (1-2) + Edge cases

Requirement Test Level Risk Link Test Count Owner Notes
Data Export Format Unit - 1 Dev Verify JSON export structure
Scroll Position Retention E2E - 1 QA Verify scroll maintained after back navigation

Total P2: 2 tests, 1 hour

P3 (Low) - Run on-demand

Criteria: Nice-to-have + Exploratory + Performance benchmarks

Requirement Test Level Test Count Owner Notes
Large Dataset Scroll Perf 1 QA Validate FPS with 1000 items

Total P3: 1 tests, 0.5 hours

Execution Order

Smoke Tests (<5 min)

Purpose: Fast feedback, catch build-breaking issues

  • App Loads (E2E)
  • History Feed Renders (Component)
  • Offline Indicator shows when network off (Integration)

Total: 3 scenarios

P0 Tests (<10 min)

Purpose: Critical path validation

  • Offline Sync Queue add/process (Integration)
  • Delete Entry Flow (Integration)

Total: 2 scenarios

P1 Tests (<30 min)

Purpose: Important feature coverage

  • PWA Install Prompt (Component)
  • Pagination (Integration)

Total: 2 scenarios

P2/P3 Tests (<60 min)

Purpose: Full regression coverage

  • Export Data (Unit)
  • Perf tests

Total: 2 scenarios

Resource Estimates

Test Development Effort

Priority Count Hours/Test Total Hours Notes
P0 8 0.5 4 Core sync logic tests
P1 5 0.5 2.5 UI/Manifest tests
P2 2 0.5 1 Export/UI polish
P3 1 0.5 0.5 Performance check
Total 16 - 8 ~1 day

Prerequisites

Test Data:

  • ChatSession factory (faker-based)
  • mock-indexeddb fixture for fast DB testing

Tooling:

  • vitest for Unit/Integration
  • playwright for E2E
  • @vite-pwa/assets-generator for icon validation

Environment:

  • Local dev environment
  • Vercel Preview (for PWA manifest validation)

Quality Gate Criteria

Pass/Fail Thresholds

  • P0 pass rate: 100% (no exceptions)
  • P1 pass rate: ≥95% (waivers required for failures)
  • High-risk mitigations: 100% complete or approved waivers

Coverage Targets

  • Critical paths (Sync): ≥90%
  • Data Integrity: 100%

Non-Negotiable Requirements

  • All P0 (Sync/Delete) tests pass
  • No high-risk (≥6) items unmitigated

Mitigation Plans

R-001: Data loss during offline-to-online sync (Score: 6)

Mitigation Strategy: Implement SyncManager class with persistent ActionQueue in Dexie. Use exponential backoff for retries. Owner: Dev Timeline: Story 3.3 Status: Complete Verification: integration/offline-sync.test.ts validates queue persistence and processing.

R-002: Deletion conflict (Score: 6)

Mitigation Strategy: Use soft deletes where possible or last-write-wins with version vector (simplified to local-first authority for MVP). Owner: Dev Timeline: Story 3.2 Status: Complete Verification: components/features/journal/DeleteConfirmDialog.test.tsx and manual verification.

Assumptions and Dependencies

Assumptions

  1. IndexedDB is reliable on supported browsers.
  2. User does not clear browser data while offline with pending actions.

Dependencies

  1. dexie library stability.
  2. next-pwa plugin for Service Worker generation.

Approval

Test Design Approved By:

  • Product Manager: Max Date: 2026-01-23
  • Tech Lead: Max Date: 2026-01-23
  • QA Lead: Max Date: 2026-01-23

Comments: Review completed. High risks mitigated by architecture decisions in Epic 3 implementation.

Appendix

Knowledge Base References

  • risk-governance.md
  • test-priorities-matrix.md

Related Documents

  • PRD: _bmad-output/planning-artifacts/prd.md
  • Epic: _bmad-output/planning-artifacts/epics.md
  • Architecture: _bmad-output/planning-artifacts/architecture.md

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