gruperly/apps/backend/test/payments.test.ts

import { beforeEach, describe, expect, it, mock, vi } from 'bun:test';
import { Hono } from 'hono';

mock.module('@/lib/prisma', () => ({
  default: {
    payment: {
      findMany: mock(),
      count: mock(),
    },
  },
  getPrismaClient: mock(),
  UnitOfWork: class {},
}));

import prisma from '@/lib/prisma';
import { paymentsRoutes } from '@/modules/payments';

const app = new Hono();
app.route('/payments', paymentsRoutes);

const payment = {
  id: 'payment-1',
  groupId: 'group-1',
  studentId: 'student-1',
  amount: { toString: () => '150.50' } as { toString(): string },
  currency: 'MXN',
  status: 'pending',
  dueDate: new Date('2026-09-01T10:00:00.000Z'),
  paidAt: null,
  createdAt: new Date('2026-08-01T10:00:00.000Z'),
  updatedAt: new Date('2026-08-01T10:00:00.000Z'),
};

describe('payments routes', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it('lists payments with pagination and converts Decimal amounts', async () => {
    prisma.payment.findMany.mockResolvedValue([payment]);
    prisma.payment.count.mockResolvedValue(1);

    const res = await app.request('/payments');

    expect(res.status).toBe(200);
    expect(await res.json()).toEqual({
      data: [
        {
          id: 'payment-1',
          groupId: 'group-1',
          studentId: 'student-1',
          amount: 150.5,
          currency: 'MXN',
          status: 'pending',
          dueDate: payment.dueDate.toISOString(),
          paidAt: null,
          createdAt: payment.createdAt.toISOString(),
          updatedAt: payment.updatedAt.toISOString(),
        },
      ],
      pagination: { page: 1, pageSize: 10, total: 1, totalPages: 1 },
    });
    expect(prisma.payment.findMany).toHaveBeenCalledWith({
      skip: 0,
      take: 10,
      orderBy: { createdAt: 'desc' },
    });
  });

  it('rejects invalid pagination query parameters', async () => {
    const res = await app.request('/payments?pageSize=101');

    expect(res.status).toBe(400);
  });
});