import { SseSerializer } from '../src/index.js';

describe('SseSerializer', () => {
  it('formats SSE events', () => {
    const serializer = new SseSerializer();
    const event = serializer.event('job:completed', {
      type: 'job:completed',
      jobId: 'job-1',
      timestamp: '2026-01-01T00:00:00.000Z',
    });

    expect(event).toContain('event: job:completed');
    expect(event).toContain('"jobId":"job-1"');
    expect(event.endsWith('\n\n')).toBe(true);
  });

  it('returns SSE headers', () => {
    expect(SseSerializer.headers()).toEqual({
      'Content-Type': 'text/event-stream',
      'Cache-Control': 'no-cache',
      Connection: 'keep-alive',
      'X-Accel-Buffering': 'no',
    });
  });
});