E2E Critical Coverage Auditor (L3 Worker)

Specialized worker auditing E2E test coverage for critical paths (risk-based).

Purpose & Scope

• Worker in ln-630 coordinator pipeline
• Audit E2E Critical Coverage (Category 2: High Priority)
• Validate E2E coverage for critical paths (Money/Security/Data Priority ≥20)
• Validate E2E coverage for core user journeys (Priority 15-19)
• Identify wasteful E2E tests (Usefulness Score <15)
• Calculate compliance score (X/10)

Inputs (from Coordinator)

Receives

contextStore

with risk-based testing philosophy, tech stack, codebase structure, test file list.

Workflow

1. Parse context (critical paths, user journeys)
2. Identify critical paths in codebase (Money, Security, Data)
3. Identify core user journeys (multi-step flows)
4. Check E2E coverage for critical paths (Priority ≥20)
5. Check E2E coverage for user journeys (Priority 15-19)
6. Validate existing E2E tests (Usefulness Score ≥15)
7. Collect findings
8. Calculate score
9. Return JSON

Audit Rules

1. Critical Path E2E Coverage

Rule: Every critical path MUST have E2E test

Critical Paths (Priority ≥20):

• Money (Priority 25): Payment processing, refunds, discounts, tax calculation
• Security (Priority 25): Login, auth, password reset, token refresh, permissions
• Data Export (Priority 20): Reports, CSV generation, data migration

Detection:

1. Scan codebase for critical keywords:

   payment

   ,

   refund

   ,

   login

   ,

   auth

   ,

   export

2. Extract critical functions/endpoints
3. Check if E2E test exists for each critical path
4. Missing E2E for Priority ≥20 → CRITICAL severity

Severity:

• CRITICAL: No E2E for Priority 25 (Money, Security)
• HIGH: No E2E for Priority 20 (Data Export)

Recommendation: Add E2E tests for critical paths immediately

Effort: M

2. Core User Journey E2E Coverage

Rule: Multi-step critical flows MUST have E2E test

Core Journeys (Priority 15-19):

• Registration → Email verification → First login (Priority 16)
• Product search → Add to cart → Checkout (Priority 18)
• File upload → Processing → Download result (Priority 15)

Detection:

1. Identify multi-step flows in routes/controllers
2. Check if end-to-end journey test exists
3. Missing E2E for Priority ≥15 → HIGH severity

Severity:

• HIGH: Missing E2E for core user journey (Priority ≥15)
• MEDIUM: Incomplete journey coverage (only partial steps tested)

Recommendation: Add end-to-end journey tests

Effort: M-L

3. E2E Test Usefulness Validation

Rule: Every E2E test MUST justify Priority ≥15

Check: For each E2E test, calculate Usefulness Score = Impact × Probability

• If Score <15 → Flag as "Potentially wasteful E2E"
• Recommendation: Convert to Integration or Unit test (cheaper)

Example:

• E2E test for "API returns 200 OK" → Impact 2, Probability 1 → Score 2 → WASTEFUL
• E2E test for "Payment with discount calculates correctly" → Impact 5, Probability 5 → Score 25 → VALUABLE

Severity:

• MEDIUM: E2E test with Usefulness Score <15
• LOW: E2E test with Score 10-14 (review needed)

Recommendation: Convert low-value E2E to Integration/Unit or remove

Effort: S

Scoring Algorithm

critical_coverage = (critical_paths_covered / critical_paths_total) * 100
journey_coverage = (core_journeys_covered / core_journeys_total) * 100
wasteful_penalty = wasteful_e2e_tests * 0.5

score = (critical_coverage * 0.6 + journey_coverage * 0.4) / 10 - wasteful_penalty
score = max(0, min(10, score))

Rationale:

• Focus on critical path coverage (60% weight), not total E2E count
• Core journeys contribute 40% weight
• Penalize wasteful E2E tests (low Usefulness Score)
• No pyramid percentages - pure risk-based prioritization

Output Format

{
  "category": "E2E Critical Coverage",
  "score": 6,
  "total_issues": 8,
  "critical": 2,
  "high": 3,
  "medium": 3,
  "metrics": {
    "critical_paths_total": 12,
    "critical_paths_covered": 7,
    "critical_coverage_percentage": 58,
    "core_journeys_total": 5,
    "core_journeys_covered": 3,
    "journey_coverage_percentage": 60,
    "wasteful_e2e_tests": 4
  },
  "findings": [
    {
      "severity": "CRITICAL",
      "critical_path": "POST /payment",
      "priority": 25,
      "location": "routes/payment.ts:45",
      "issue": "No E2E test for payment processing",
      "recommendation": "Add E2E: successful payment + failed payment scenarios",
      "effort": "M"
    },
    {
      "severity": "HIGH",
      "user_journey": "Registration → Email verification → First login",
      "priority": 16,
      "location": "routes/auth.ts + routes/users.ts",
      "issue": "Missing end-to-end journey test",
      "recommendation": "Add E2E test covering full registration flow",
      "effort": "L"
    },
    {
      "severity": "MEDIUM",
      "e2e_test": "GET /users returns 200",
      "usefulness_score": 4,
      "location": "users.test.ts:23",
      "issue": "Low-value E2E test (Score <15)",
      "recommendation": "Convert to Integration test or remove",
      "effort": "S"
    }
  ]
}

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Version: 3.0.0 Last Updated: 2025-12-23