# Tests Audit Report

**Branch**: fix/tech-debt-quick-wins
**Base**: main
**Date**: 2025-12-13 20:01:00
**Auditor**: Claude Opus 4.5

---

## Summary of Changes

This branch introduces several important tech debt fixes:

1. **NoOpProcessSpawner and MockChildProcess** (`src/bootstrap.ts`) - Test mode infrastructure to prevent spawning real Claude Code instances during integration tests
2. **AUTOBEAT_TEST_MODE environment variable** - Controls test behavior in bootstrap
3. **AUTOBEAT_DATABASE_PATH environment variable** (`src/implementations/database.ts`) - Allows full database path override for test isolation
4. **Database migration v3** - Adds CHECK constraints on status and priority columns
5. **Zod validation in repositories** - Validates database rows at system boundary
6. **ResourceMonitor shutdown fix** (`src/core/container.ts`) - Stops monitoring before other cleanup
7. **Structured logging in Database** - Replaces console.log with logger
8. **Test fixture fix** - Changes 'pending' to 'queued' in createTestTask

---

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

### Missing Test Coverage for New Code

#### 1.1 NoOpProcessSpawner and MockChildProcess - No Unit Tests

**File**: `/workspace/delegate/src/bootstrap.ts` (lines 17-91)
**Severity**: MEDIUM (not blocking due to indirect integration test coverage)

**Issue**: The new `NoOpProcessSpawner` and `MockChildProcess` classes introduced in bootstrap.ts have no dedicated unit tests. While they are exercised indirectly through integration tests via `AUTOBEAT_TEST_MODE=true`, there is no explicit test coverage for:

- `MockChildProcess.kill()` returning true
- `MockChildProcess.send()` returning true  
- `MockChildProcess` emitting 'exit' and 'close' events via setImmediate
- `NoOpProcessSpawner.spawn()` returning incrementing PIDs starting at 90000
- `NoOpProcessSpawner.kill()` returning ok(undefined)
- `NoOpProcessSpawner.dispose()` being a no-op

**Recommendation**: Add unit tests in `tests/unit/implementations/bootstrap.test.ts` or `tests/unit/fixtures/` to explicitly test these behaviors.

```typescript
// Suggested test structure:
describe('NoOpProcessSpawner', () => {
  it('should return incrementing PIDs starting at 90000', () => {});
  it('should emit exit event via setImmediate', async () => {});
  it('should return ok(undefined) from kill()', () => {});
});
```

#### 1.2 Zod Schema Validation - No Error Path Tests

**Files**: 
- `/workspace/delegate/src/implementations/task-repository.ts` (lines 18-44, 270-278)
- `/workspace/delegate/src/implementations/dependency-repository.ts` (lines 16-23, 544-568)

**Severity**: MEDIUM (not blocking due to defense-in-depth nature)

**Issue**: The new Zod validation schemas (`TaskRowSchema`, `DependencyRowSchema`) and the `rowToTask()`/`rowToDependency()` methods have validation that throws on invalid data, but there are no tests verifying this error behavior.

**Analysis**: The code throws an Error when validation fails:
```typescript
if (!validated.success) {
  throw new Error(
    `Invalid task row data for id=${row.id}: ${validated.error.message}`
  );
}
```

**Missing Test Cases**:
- Test that `rowToTask()` throws when status is invalid (e.g., 'invalid-status')
- Test that `rowToTask()` throws when priority is invalid (e.g., 'P9')
- Test that `rowToDependency()` throws when resolution is invalid
- Test that error message includes the task/dependency ID

**Recommendation**: Add explicit error path tests:

```typescript
// In tests/unit/implementations/task-repository.test.ts
describe('rowToTask validation', () => {
  it('should throw on invalid status value', () => {
    // Insert directly into DB with invalid status
    sqliteDb.prepare(`
      INSERT INTO tasks (id, prompt, status, priority, created_at)
      VALUES (?, ?, ?, ?, ?)
    `).run('test-id', 'prompt', 'invalid-status', 'P1', Date.now());
    
    await expect(repo.findById('test-id')).rejects.toThrow(/Invalid task row data/);
  });
});
```

#### 1.3 Database Migration v3 - CHECK Constraints Not Tested

**File**: `/workspace/delegate/src/implementations/database.ts` (lines 355-407)
**Severity**: LOW (defensive constraint, low risk)

**Issue**: The new migration that adds CHECK constraints on status and priority columns is not explicitly tested. While the migration itself will work (SQLite table recreation pattern), there's no test verifying:

- The CHECK constraint rejects invalid status values
- The CHECK constraint rejects invalid priority values
- The migration preserves existing data correctly

**Recommendation**: Add migration test:

```typescript
describe('Database migration v3', () => {
  it('should reject invalid status via CHECK constraint', () => {
    expect(() => {
      sqliteDb.prepare(`
        INSERT INTO tasks (id, prompt, status, priority, created_at)
        VALUES (?, ?, ?, ?, ?)
      `).run('test', 'prompt', 'bad-status', 'P1', Date.now());
    }).toThrow(/CHECK constraint/);
  });
});
```

---

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

### 2.1 Integration Test Isolation Uses Timing-Based Waits

**File**: `/workspace/delegate/tests/integration/task-dependencies.test.ts`
**Severity**: MEDIUM

**Issue**: The integration tests use `await new Promise(resolve => setTimeout(resolve, 100-150))` for synchronization. While this works, it makes tests slow and potentially flaky.

**Lines Changed**:
- Line 74, 89, 100, 120, etc.

**Current Pattern**:
```typescript
// Wait for persistence
await new Promise(resolve => setTimeout(resolve, 100));
```

**Recommendation**: Consider using event-driven synchronization or polling with timeout:

```typescript
// Better: Wait for specific event
await new Promise(resolve => {
  eventBus.once('TaskPersisted', resolve);
});

// Or: Poll with timeout
await waitFor(() => dependencyRepo.getDependencies(taskB.id), { timeout: 1000 });
```

### 2.2 Container.dispose() Resource Monitor Shutdown - Order Tested Indirectly

**File**: `/workspace/delegate/src/core/container.ts` (lines 183-191)
**Severity**: LOW

**Issue**: The fix to stop ResourceMonitor FIRST during shutdown is critical but only tested indirectly through integration tests. A unit test would document this requirement.

**Added Code**:
```typescript
// CRITICAL: Stop ResourceMonitor FIRST to prevent event storm during shutdown
const resourceMonitorResult = this.get('resourceMonitor');
if (resourceMonitorResult.ok) {
  const resourceMonitor = resourceMonitorResult.value as any;
  if (resourceMonitor.stopMonitoring) {
    resourceMonitor.stopMonitoring();
  }
}
```

**Recommendation**: Add explicit unit test for dispose() order:

```typescript
describe('Container.dispose()', () => {
  it('should stop resource monitor before other cleanup', async () => {
    const callOrder: string[] = [];
    const mockMonitor = {
      stopMonitoring: () => callOrder.push('stopMonitoring')
    };
    const mockWorkerPool = {
      killAll: async () => callOrder.push('killAll')
    };
    
    container.registerValue('resourceMonitor', mockMonitor);
    container.registerValue('workerPool', mockWorkerPool);
    
    await container.dispose();
    
    expect(callOrder[0]).toBe('stopMonitoring');
  });
});
```

---

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

### 3.1 No Task Repository Unit Tests File

**Observation**: File `tests/unit/implementations/task-repository.test.ts` does not exist.
**Severity**: INFO
**Context**: The dependency-repository has comprehensive unit tests, but task-repository relies on integration tests only. This is pre-existing and not introduced by this branch.

### 3.2 Test Fixture Mock Logger Missing child() Method Type

**File**: `/workspace/delegate/tests/fixtures/test-data.ts`
**Severity**: INFO
**Lines**: 53-58

```typescript
export const mockLoggerFactory = () => ({
  info: () => {},
  error: () => {},
  warn: () => {},
  debug: () => {}
  // Missing: child: () => mockLoggerFactory()
});
```

This is pre-existing and may cause issues if tests need logger.child().

### 3.3 Database Tests Use TEST_COUNTS.STRESS_TEST Without Definition

**File**: `/workspace/delegate/tests/unit/implementations/database.test.ts`
**Severity**: INFO
**Lines**: 4, 251, 261, 278

The tests import `TEST_COUNTS` but the constant definition location is not clear from the changed files. This is pre-existing infrastructure.

---

## Test Quality Assessment

### Positive Aspects

1. **Integration tests are comprehensive** - The task-dependencies.test.ts covers:
   - Basic dependency flow (blocking until completion)
   - Multiple dependencies
   - Diamond dependency pattern
   - Dependency queries
   - QueueHandler integration (unblocking on completion)

2. **Dependency repository tests are thorough** - 1255 lines of tests covering:
   - All CRUD operations
   - Batch operations with atomicity
   - Edge cases (100 dependency limit)
   - Concurrent operations

3. **Proper test isolation** - The AUTOBEAT_DATABASE_PATH pattern creates isolated temp directories per test.

4. **Event-driven architecture is tested** - Tests verify event emission and handling.

### Areas for Improvement

1. **Missing unit tests for new code** - NoOpProcessSpawner, Zod schemas, migration v3
2. **Timing-based synchronization** - Could be more deterministic
3. **No negative path tests for schema validation** - Only happy path tested

---

## Tests Score

| Criteria | Score | Notes |
|----------|-------|-------|
| Coverage of new code | 6/10 | New classes tested indirectly only |
| Test quality | 8/10 | Clear assertions, good isolation |
| Edge case coverage | 7/10 | Missing schema validation error paths |
| Test architecture | 8/10 | Good event-driven patterns |
| Maintainability | 7/10 | Some timing-based waits |

**Overall Tests Score: 7.2/10**

---

## Merge Recommendation

**APPROVED WITH CONDITIONS**

### Rationale

1. **All existing tests pass** - The 25 integration tests pass successfully
2. **Changes are defensive** - Zod validation and CHECK constraints add safety without breaking existing functionality
3. **Test mode infrastructure works** - Integration tests run without spawning real Claude Code instances
4. **Low risk** - Missing tests are for defensive code paths that should "never happen" in normal operation

### Conditions for Merge

1. **Recommended (not blocking)**: Add unit tests for NoOpProcessSpawner/MockChildProcess in a follow-up PR
2. **Recommended (not blocking)**: Add schema validation error path tests in a follow-up PR
3. **Consider**: Document the AUTOBEAT_TEST_MODE and AUTOBEAT_DATABASE_PATH environment variables in CLAUDE.md

### Follow-up Tech Debt

- [ ] Add unit tests for NoOpProcessSpawner and MockChildProcess
- [ ] Add error path tests for Zod schema validation in repositories
- [ ] Add explicit test for Container.dispose() resource cleanup order
- [ ] Add test for Database migration v3 CHECK constraints
- [ ] Consider replacing timing-based waits with event-driven synchronization

---

## Files Analyzed

| File | Lines Changed | Test Coverage |
|------|---------------|---------------|
| src/bootstrap.ts | +78 | Indirect via integration |
| src/core/container.ts | +10 | Indirect via integration |
| src/implementations/database.ts | +75 | Indirect via integration |
| src/implementations/dependency-repository.ts | +23 | Good unit coverage |
| src/implementations/task-repository.ts | +49 | Integration only |
| tests/fixtures/test-data.ts | +1 | N/A (fixture) |
| tests/integration/task-dependencies.test.ts | +73 | Self-testing |
| package.json | +1 | N/A (config) |
