brachnha-insight/_bmad-output/test-design-epic-4.md

Test Design: Epic 4 - Power User Settings - BYOD & Configuration

Date: 2026-01-24 Author: Max Status: Approved (Verification Failed)

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Executive Summary

Scope: Epic-Level test design for Epic 4 (BYOD & Configuration). Focus on security of API keys and reliability of provider connections.

Risk Summary:

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

Verification Status:

• Exploratory Validation (P0): FAILED ❌
• Reason: P0 Tests (Provider Switching, Key Security) failed in automation due to accessibility selector mismatches (missing accessible names on inputs).
• Action Required: Dev team to add aria-label or <label> associations to Settings form inputs.

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Risk Assessment

High-Priority Risks (Score ≥6)

Risk ID	Category	Description	Probability	Impact	Score	Mitigation	Owner	Timeline
R-001	SEC	API Key Theft via XSS (if localStorage compromised)	2 (Possible)	3 (Critical)	6	Basic encoding (obfuscation) + Minimize 3rd party scripts. Future: Encrypt with session password.	DEV	Sprint 4
R-002	TECH	Browser CORS policies blocking direct API calls	3 (Likely)	2 (Degraded)	6	Implement optional Vercel Edge Proxy for non-CORS providers (as per Architecture).	DEV	Sprint 4

Medium-Priority Risks (Score 3-4)

Risk ID	Category	Description	Probability	Impact	Score	Mitigation	Owner
R-003	BUS	Invalid credentials causing chat failure	3 (Likely)	1 (Minor)	3	Story 4.2 "Connection Validation" (Hello check) before saving.	DEV
R-004	DATA	Loss of settings on browser cache clear	2 (Possible)	2 (Degraded)	4	Accept risk for MVP (Local-First constraint).	PM

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Test Coverage Plan

P0 (Critical) - Run on every commit

Criteria: Blocks core functionality (chat) + High Risk (Security/CORS).

Requirement	Test Level	Risk Link	Test Count	Owner	Notes
Provider Switching	E2E	R-002	1	QA	Verify requests routed to correct Base URL.
Key Storage Security	Unit	R-001	1	DEV	Verify keys are encoded in localStorage (not plain text).
Connection Validation	API (Mock)	R-003	1	DEV	Verify validation fails gracefully for invalid keys.

Total P0: 3 tests, 6 hours

P1 (High) - Run on PR to main

Criteria: Important configuration features.

Requirement	Test Level	Risk Link	Test Count	Owner	Notes
Settings Persistence	Component	R-004	2	DEV	Verify settings survive reload.
Model Selection	Unit	-	2	DEV	Verify model-specific parameters/payloads.
Default Configuration	Unit	-	1	DEV	Verify defaults applied when no custom settings.

Total P1: 5 tests, 5 hours

P2 (Medium) - Run nightly/weekly

Criteria: UI polish and edge cases.

Requirement	Test Level	Risk Link	Test Count	Owner	Notes
UI Field Validation	Component	-	4	DEV	Empty fields, malformed URLs.
Provider List Rendering	Component	-	2	DEV	Verify list updates when adding new provider.

Total P2: 6 tests, 3 hours

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Quality Gate Criteria

Pass/Fail Thresholds

• P0 pass rate: 100%
• P1 pass rate: ≥95%
• High-risk mitigations: R-001 (Encoding) and R-002 (CORS/Proxy plan) must be implemented.

Coverage Targets

• Security scenarios (Key storage): 100%

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Mitigation Plans

R-001: API Key Theft via XSS (Score: 6)

Mitigation Strategy: Implement basic encoding for keys in localStorage to prevent casual shoulder-surfing or simple grep attacks. Minimize use of third-party scripts to reduce XSS surface. Owner: DEV Timeline: Sprint 4 Implementation Status: Planned Verification: Inspect localStorage during P0 test; verify key is not human-readable.

R-002: Browser CORS blocking (Score: 6)

Mitigation Strategy: Provide optional "Proxy Mode" configuration. Owner: DEV Timeline: Sprint 4 Implementation Status: Planned Verification: P0 E2E test verifying proxy routing when enabled.

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