ApiCore/ApiCore-Backend/src/notifications/notifications.service.spec.ts

import { ForbiddenException, NotFoundException } from '@nestjs/common';
import { NotificationsService } from './notifications.service';
import { PrismaService } from '../prisma/prisma.service';

describe('NotificationsService', () => {
  let service: NotificationsService;
  let prisma: {
    notification: {
      create: jest.Mock;
      findMany: jest.Mock;
      findUnique: jest.Mock;
      update: jest.Mock;
    };
  };

  beforeEach(() => {
    prisma = {
      notification: {
        create: jest.fn(),
        findMany: jest.fn(),
        findUnique: jest.fn(),
        update: jest.fn(),
      },
    };
    service = new NotificationsService(prisma as unknown as PrismaService);
  });

  it('records a notification with the given priority and message', async () => {
    const created = {
      id: 'n1',
      priority: 'KRITISCH',
      message: 'Keine Königin gesehen',
    };
    prisma.notification.create.mockResolvedValueOnce(created);

    const result = await service.record({
      priority: 'KRITISCH',
      message: 'Keine Königin gesehen',
    });

    expect(result).toEqual(created);
    expect(prisma.notification.create).toHaveBeenCalledWith({
      data: { priority: 'KRITISCH', message: 'Keine Königin gesehen' },
    });
  });

  it('lists notifications for a user including broadcast notifications', async () => {
    await service.findAll({ userId: 'user-1' });

    const [[queryArg]] = prisma.notification.findMany.mock.calls as [
      [{ where: { OR?: { userId: string | null }[] } }],
    ];
    expect(queryArg.where.OR).toEqual([{ userId: 'user-1' }, { userId: null }]);
  });

  it('throws NotFoundException when marking an unknown notification as read', async () => {
    prisma.notification.findUnique.mockResolvedValueOnce(null);
    await expect(service.markRead('missing', 'user-1')).rejects.toBeInstanceOf(
      NotFoundException,
    );
  });

  it("throws ForbiddenException when marking another user's notification as read", async () => {
    prisma.notification.findUnique.mockResolvedValueOnce({
      id: 'n1',
      userId: 'owner',
      read: false,
    });
    await expect(service.markRead('n1', 'someone-else')).rejects.toBeInstanceOf(
      ForbiddenException,
    );
  });

  it('marks a broadcast notification (no owner) as read for any user', async () => {
    prisma.notification.findUnique.mockResolvedValueOnce({
      id: 'n1',
      userId: null,
      read: false,
    });
    prisma.notification.update.mockResolvedValueOnce({ id: 'n1', read: true });

    const result = await service.markRead('n1', 'any-user');

    expect(result.read).toBe(true);
  });

  it("marks the owner's own notification as read", async () => {
    prisma.notification.findUnique.mockResolvedValueOnce({
      id: 'n1',
      userId: 'user-1',
      read: false,
    });
    prisma.notification.update.mockResolvedValueOnce({ id: 'n1', read: true });

    const result = await service.markRead('n1', 'user-1');

    expect(result.read).toBe(true);
  });
});