petitspas/backend/src/modules/cards/cards-realtime.service.spec.ts

import { MessageEvent } from '@nestjs/common';
import { CardsRealtimeService } from './cards-realtime.service';

describe('CardsRealtimeService (#195)', () => {
  let service: CardsRealtimeService;

  beforeEach(() => {
    service = new CardsRealtimeService();
  });

  afterEach(() => {
    service.onModuleDestroy();
  });

  it('émet card.created aux abonnés du user', async () => {
    const events: MessageEvent[] = [];
    const sub = service.streamFor('user-a').subscribe((e) => events.push(e));

    await new Promise((r) => setTimeout(r, 20));
    expect(events[0]?.type).toBe('heartbeat');
    expect(service.subscriberCount('user-a')).toBe(1);

    service.emitToUsers(['user-a', 'user-b'], 'card.created', 'card-1', {
      id: 'card-1',
    });
    await new Promise((r) => setTimeout(r, 20));

    const created = events.find((e) => e.type === 'card.created');
    expect(created).toBeDefined();
    expect((created!.data as { card_id: string }).card_id).toBe('card-1');
    expect(service.subscriberCount('user-b')).toBe(0);

    sub.unsubscribe();
    expect(service.subscriberCount('user-a')).toBe(0);
  });

  it('ne diffuse pas aux users non abonnés', async () => {
    const events: MessageEvent[] = [];
    const sub = service.streamFor('user-a').subscribe((e) => events.push(e));
    await new Promise((r) => setTimeout(r, 20));
    const before = events.length;
    service.emitToUsers(['user-b'], 'card.updated', 'x');
    await new Promise((r) => setTimeout(r, 20));
    expect(events.length).toBe(before);
    sub.unsubscribe();
  });
});