# Security Audit Report

**Branch**: fix/timing-based-test-waits
**Base**: main
**Date**: 2025-12-28 22:51
**Files Analyzed**: 12
**Lines Changed**: +250 / -143

---

## Summary

This PR replaces timing-based test waits (setTimeout) with deterministic event-driven synchronization patterns. The changes are purely test infrastructure improvements with **no security vulnerabilities identified**.

### Change Overview

| File | Type | Security Relevance |
|------|------|-------------------|
| `src/bootstrap.ts` | Production | Low - Adds DI option for tests |
| `tests/fixtures/test-doubles.ts` | Test | None - Test utility code |
| `tests/utils/event-helpers.ts` | Test | None - New test utility |
| `tests/utils/async-helpers.ts` | Test | None - New test utility |
| 8 test files | Test | None - Replace setTimeout calls |

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## Category 1: Issues in Your Changes (BLOCKING)

**No blocking issues found.**

All changes in this PR are test infrastructure improvements:
- No user input processing
- No authentication/authorization changes
- No cryptographic changes
- No network operations
- No file system operations in production code

---

## Category 2: Issues in Code You Touched (Should Fix)

**No issues found.**

The only production code change is in `src/bootstrap.ts`:

```typescript
// Lines 224-228 (ADDED)
if (options.resourceMonitor) {
  logger.info('Using provided ResourceMonitor');
  return options.resourceMonitor;
}
```

**Analysis**: This follows the existing pattern for `processSpawner` injection. The `resourceMonitor` parameter is typed as `ResourceMonitor` interface, providing compile-time safety. This is standard dependency injection for testing and poses no security risk.

---

## Category 3: Pre-existing Issues (Not Blocking)

**No pre-existing security issues found in the touched files.**

---

## Security Pattern Analysis

| Pattern | Status | Notes |
|---------|--------|-------|
| Input Validation | N/A | Test infrastructure only |
| Authentication | N/A | No auth changes |
| Authorization | N/A | No authz changes |
| Cryptography | N/A | No crypto changes |
| Secrets/Credentials | PASS | No hardcoded secrets |
| SQL Injection | N/A | No query construction |
| Command Injection | N/A | No shell commands |
| XSS | N/A | No HTML output |
| Path Traversal | N/A | No file path handling |
| Race Conditions | IMPROVED | PR fixes test flakiness |

---

## New Test Utilities Review

### `tests/utils/event-helpers.ts`

Safe test utility functions:
- `waitForEvent()` - Promise-based event waiting
- `waitForEvents()` - Wait for multiple events
- `collectEvents()` - Collect N events
- `waitForCondition()` - Conditional event waiting
- `emitAndWait()` - Emit and wait pattern
- `flushEventLoop()` - Flush microtasks

**Security**: All functions are isolated test utilities with proper timeout handling to prevent test hangs.

### `tests/utils/async-helpers.ts`

Safe async test helpers:
- `waitFor()` - Condition polling
- `waitForEvent()` - Event emitter waiting
- `flushPromises()` - Microtask flushing
- `createDeferred()` - Deferred promise pattern
- `withTimeout()` - Timeout wrapper

**Security**: Standard async testing patterns with no security concerns.

### `tests/fixtures/test-doubles.ts` (additions)

New methods on `TestEventBus`:
- `waitFor()` - Event waiting with filter
- `flushHandlers()` - Handler flushing
- `once()` - One-time subscription
- `removeListener()` - Listener removal

**Security**: Test double extensions following existing patterns.

---

## Positive Security Impact

This PR **improves** test reliability by:

1. **Eliminating race conditions** - Replaces arbitrary `setTimeout` delays with deterministic event synchronization
2. **Reducing flakiness** - Tests now wait for actual events rather than guessing timing
3. **Improving maintainability** - Centralized async utilities with proper timeout handling

---

## Summary

**Your Changes:**
- CRITICAL: 0
- HIGH: 0
- MEDIUM: 0
- LOW: 0

**Code You Touched:**
- HIGH: 0
- MEDIUM: 0
- LOW: 0

**Pre-existing:**
- MEDIUM: 0
- LOW: 0

**Security Score**: 10/10

**Merge Recommendation**: APPROVED

---

## Remediation Priority

**Fix before merge:** None required

**Fix while you're here:** None required

**Future work:** None required

---

## PR Comment Summary

- **Comments Created**: 0
- **Comments Skipped**: 0 (no security issues to comment on)

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*Generated by Security Review Agent*
