Deterministisches Timer- und Methoden-Mocking mit node:test

import { test } from 'node:test';
import assert from 'node:assert';
 
test('stubs timer and object method', (t) => {
  t.mock.timers.enable({ apis: ['setTimeout'] });
  const service = { fetchData: () => 'real data' };
  t.mock.method(service, 'fetchData', () => 'mocked data');
  
  let result = null;
  setTimeout(() => { result = service.fetchData(); }, 1000);
  t.mock.timers.tick(1000);
  
  assert.strictEqual(result, 'mocked data');
});