import { describe, it, expect } from 'vitest';
import { pool } from '../../lib/db/pool.js';

// A pg.Pool emits 'error' when an *idle* pooled client errors (DB restart,
// replication failover). With no 'error' listener, EventEmitter throws and the
// whole process crashes. The pool must register a handler.
describe('db pool error handling', () => {
  it('has an error listener so an idle-client error never crashes the process', () => {
    expect(pool.listenerCount('error')).toBeGreaterThan(0);
    expect(() => pool.emit('error', new Error('simulated idle-client error'), null)).not.toThrow();
  });
});