# Tests Audit Report

**Branch**: refactor/bootstrap-extraction
**Base**: main
**Date**: 2025-12-15 21:53:00

---

## Executive Summary

This PR extracts handler setup logic from `bootstrap.ts` into a dedicated `handler-setup.ts` module. The refactoring reduces bootstrap complexity and prepares for v0.4.0 handler additions. **Tests are provided and pass**, but there are several coverage gaps in error paths that should be addressed.

---

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

### 1.1 Missing Error Path Tests for `setupEventHandlers`

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: HIGH
**Lines**: 150-217 (setupEventHandlers describe block)

**Problem**: The `setupEventHandlers` function has three distinct error paths (lines 196-234 in handler-setup.ts), but only the happy path is tested:

1. **Untested**: `registry.registerAll()` failure path (line 196-203)
2. **Untested**: `registry.initialize()` failure path (line 206-215)  
3. **Untested**: `DependencyHandler.create()` failure path (line 220-234)

**Evidence from coverage report**:
```
handler-setup.ts |    85.5 |    68.96 |     100 |    85.5 | ...09-215,228-234
```

Lines 209-215 and 228-234 are NOT covered - these are the cleanup/error handling paths.

**Impact**: If registry initialization fails, the code calls `registry.shutdown()` to cleanup. This cleanup-on-error behavior is not verified.

**Fix Required**:
```typescript
// Add these tests to handler-setup.test.ts:

it('should cleanup handlers if registry.initialize() fails', async () => {
  // Mock a handler that throws during setup
  // Verify registry.shutdown() is called
});

it('should cleanup standard handlers if DependencyHandler.create() fails', async () => {
  // Mock DependencyHandler.create() to return error
  // Verify registry.shutdown() is called before returning error
});
```

---

### 1.2 Weak Assertion in "should setup all 7 handlers" Test

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: MEDIUM
**Lines**: 179-200

**Problem**: The test asserts `subscriptionCount > 0` which is too weak. It should verify the specific count matches expectations (7 handlers with known event subscriptions).

**Current Code**:
```typescript
const subscriptionCount = (eventBus as any).handlers?.size ?? 0;
// ...
expect(subscriptionCount).toBeGreaterThan(0); // Too weak!
```

**Issue**: This assertion passes even if only 1 handler registered. The test comment says "all 7 handlers" but doesn't verify 7.

**Fix Required**: Either:
- Assert a specific minimum subscription count based on known handler subscriptions
- Or export handler count from `setupEventHandlers` result and verify it

---

### 1.3 No Tests for Missing Dependencies 5-10

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: LOW
**Lines**: 99-148 (extractHandlerDependencies tests)

**Problem**: Tests verify missing `config`, `logger`, `eventBus`, `taskRepository` but NOT:
- `outputCapture` (line 98-99 in handler-setup.ts)
- `taskQueue` (line 101-102)
- `dependencyRepository` (line 104-105)
- `workerPool` (line 107-108)
- `resourceMonitor` (line 110-111)
- `worktreeManager` (line 113-114)

**Impact**: The fail-fast extraction pattern is only partially verified.

**Recommendation**: Add at least one test for a later dependency to prove ordering matters, or add a parameterized test covering all 10.

---

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

### 2.1 No Cleanup Test for Registry Lifecycle

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: MEDIUM  
**Lines**: 164-177

**Problem**: Test verifies `registry.shutdown()` returns success, but doesn't verify handlers are actually disposed:

```typescript
it('should return registry for lifecycle management', async () => {
  // ...
  const shutdownResult = await result.value.registry.shutdown();
  expect(shutdownResult.ok).toBe(true);
  // No verification that handlers actually cleaned up!
});
```

**Impact**: If handlers have teardown logic that fails silently, this test wouldn't catch it.

---

### 2.2 Test Uses Real Implementations Instead of Test Doubles

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: MEDIUM
**Lines**: 32-72 (beforeEach setup)

**Problem**: Test uses real implementations:
- `SQLiteTaskRepository` (real database)
- `SQLiteDependencyRepository` (real database)
- `SystemResourceMonitor` (real system calls)
- `EventDrivenWorkerPool` (complex real pool)
- `GitWorktreeManager` (filesystem operations)

**Existing test doubles in `tests/fixtures/test-doubles.ts` are NOT used**:
- `TestTaskRepository`
- `TestResourceMonitor`
- `TestOutputCapture`

**Impact**: 
- Tests are slower than necessary
- Tests require temp filesystem operations
- Tests are more brittle (real dependencies can fail)

**Recommendation**: For unit tests of `handler-setup.ts`, use test doubles for faster, more isolated tests. Reserve real implementations for integration tests.

---

### 2.3 Database Cleanup in afterEach is Incomplete

**File**: `/workspace/delegate/tests/unit/services/handler-setup.test.ts`
**Severity**: LOW
**Lines**: 74-78

**Problem**: The afterEach calls `database.close()` but doesn't call `registry.shutdown()` if tests fail:

```typescript
afterEach(async () => {
  eventBus.dispose();
  database.close();
  await rm(tempDir, { recursive: true, force: true });
  // Missing: registry cleanup if setupEventHandlers was called
});
```

**Impact**: If a test fails after calling `setupEventHandlers`, handlers remain subscribed to eventBus.

---

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

### 3.1 EventHandlerRegistry.registerAll Cannot Actually Fail

**File**: `/workspace/delegate/src/core/events/handlers.ts`
**Lines**: 123-131

**Problem**: The `registerAll` method always returns `ok(undefined)` - it cannot fail:

```typescript
registerAll(handlers: BaseEventHandler[]): Result<void> {
  for (const handler of handlers) {
    const result = this.register(handler);
    if (!result.ok) {
      return result;  // Never reached - register() always succeeds
    }
  }
  return ok(undefined);
}
```

And `register()` (line 109-118) also always returns `ok(undefined)`.

**Impact**: The error path in `handler-setup.ts` lines 196-203 is unreachable dead code.

**Recommendation**: Either:
- Add validation to `register()` that can fail (duplicate detection, etc.)
- Or remove the error handling in `handler-setup.ts` (simpler)

---

### 3.2 DependencyHandler Not Added to Registry

**File**: `/workspace/delegate/src/services/handler-setup.ts`
**Lines**: 217-234

**Problem**: The DependencyHandler uses factory pattern and is NOT added to the registry. This means `registry.shutdown()` won't call its teardown.

```typescript
// DependencyHandler is created but not registered:
const dependencyHandlerResult = await DependencyHandler.create(...);
// Never calls: registry.register(dependencyHandlerResult.value);
```

**Comment in code acknowledges this**:
```typescript
// Cannot use registry because create() does its own event subscription
```

**Impact**: When `registry.shutdown()` is called, DependencyHandler remains subscribed.

---

## Summary

| Category | Count | Severity Distribution |
|----------|-------|----------------------|
| Your Changes (BLOCKING) | 3 | 1 HIGH, 1 MEDIUM, 1 LOW |
| Code You Touched (Should Fix) | 3 | 0 HIGH, 2 MEDIUM, 1 LOW |
| Pre-existing (Informational) | 2 | 0 HIGH, 1 MEDIUM, 1 LOW |

**Tests Score**: 6/10

**Breakdown**:
- +3 for having dedicated test file
- +2 for testing happy paths
- +1 for testing some error conditions
- -2 for missing error path coverage (cleanup behavior)
- -1 for weak assertions
- -1 for not using test doubles

---

## Merge Recommendation

**REVIEW REQUIRED** - The PR provides functional tests but has gaps in error path coverage.

### Required Before Merge:
1. Add test for `setupEventHandlers` cleanup when `registry.initialize()` fails

### Recommended (can be separate PR):
2. Add test for cleanup when `DependencyHandler.create()` fails
3. Strengthen the "7 handlers" assertion
4. Consider using test doubles for faster tests

### Nice to Have:
5. Complete coverage of all 10 missing dependency error messages

---

## Code Coverage for Changed Files

```
File               | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
-------------------|---------|----------|---------|---------|-------------------
handler-setup.ts   |   85.5  |    68.96 |    100  |   85.5  | 209-215, 228-234
```

**Note**: Uncovered lines 209-215 and 228-234 are precisely the error cleanup paths identified in this audit.
