import { StudentsService } from './students.service';

describe('StudentsService — teacher class scope', () => {
  it('limits student list to active students in assigned classes', async () => {
    const repo = { find: jest.fn().mockResolvedValue([{ id: 11, name: '张三' }]) };
    const classStudentRepo = {
      find: jest.fn().mockResolvedValue([{ studentId: 11 }, { studentId: 11 }, { studentId: 12 }]),
    };
    const service = new StudentsService(
      repo as never,
      classStudentRepo as never,
      {} as never,
      {} as never,
      {} as never,
      {} as never,
    );

    await service.findAll({}, [3, 5]);

    expect(classStudentRepo.find).toHaveBeenCalledWith({
      where: { classId: expect.any(Object), status: 'active' },
    });
    expect(repo.find).toHaveBeenCalledWith(
      expect.objectContaining({
        where: expect.objectContaining({ id: expect.any(Object) }),
        relations: ['organization'],
      }),
    );
  });

  it('returns an empty student list when teacher has no assigned classes', async () => {
    const repo = { find: jest.fn() };
    const service = new StudentsService(
      repo as never,
      {} as never,
      {} as never,
      {} as never,
      {} as never,
      {} as never,
    );

    await expect(service.findAll({}, [])).resolves.toEqual([]);
    expect(repo.find).not.toHaveBeenCalled();
  });
});