import { AttendanceCalendarService } from './attendance-calendar.service';

describe('AttendanceCalendarService — 默认周起点', () => {
  function createService() {
    return new AttendanceCalendarService({} as never, {} as never);
  }

  afterEach(() => jest.useRealTimers());

  it('未传 weekStart 时默认本周一（中国日期）', async () => {
    jest.useFakeTimers().setSystemTime(new Date('2026-08-05T10:00:00+08:00')); // 周三
    const service = createService();
    const spy = jest
      .spyOn(service as never, 'buildCalendar' as never)
      .mockResolvedValue([] as never);

    await service.getCalendar({ classId: 1 } as never);

    expect(spy).toHaveBeenCalledWith(1, '2026-08-03');
  });

  it('周日晚间仍归入本周一', async () => {
    jest.useFakeTimers().setSystemTime(new Date('2026-08-09T22:00:00+08:00')); // 周日晚上
    const service = createService();
    const spy = jest
      .spyOn(service as never, 'buildCalendar' as never)
      .mockResolvedValue([] as never);

    await service.getCalendar({ classId: 1 } as never);

    expect(spy).toHaveBeenCalledWith(1, '2026-08-03');
  });

  it('传入 weekStart 时原样透传', async () => {
    const service = createService();
    const spy = jest
      .spyOn(service as never, 'buildCalendar' as never)
      .mockResolvedValue([] as never);

    await service.getCalendar({ classId: 1, weekStart: '2026-08-10' } as never);

    expect(spy).toHaveBeenCalledWith(1, '2026-08-10');
  });
});