backend/src/tbank/brokerage-accounts.service.spec.ts

import {
  BadRequestException,
  ConflictException,
  ServiceUnavailableException,
} from '@nestjs/common';

jest.mock('../prisma/prisma.service', () => ({
  PrismaService: class PrismaService {},
}));

import { BrokerageAccountsService } from './brokerage-accounts.service';
import { TbankAccessService } from './tbank-access.service';
import { TbankTokenService } from './tbank-token.service';

describe('BrokerageAccountsService', () => {
  const encryptionKey = 'MDEyMzQ1Njc4OWFiY2RlZjAxMjM0NTY3ODlhYmNkZWY=';
  const prisma = { tbankConnection: { findUnique: jest.fn() } };
  const config = { getOrThrow: jest.fn(() => encryptionKey) };
  const tbank = {
    getOpenAccounts: jest.fn(),
    getPortfolio: jest.fn(),
    getPositions: jest.fn(),
  };
  const tokens = new TbankTokenService(config as never);
  const access = new TbankAccessService(
    prisma as never,
    tokens,
    tbank as never,
  );
  const service = new BrokerageAccountsService(access, tbank as never);

  beforeEach(() => {
    jest.clearAllMocks();
    tbank.getPortfolio.mockResolvedValue({ positions: [] });
    tbank.getPositions.mockResolvedValue({ money: [] });
  });

  it('does not call T-Bank without a connection', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue(null);

    await expect(service.list('user-1')).rejects.toEqual(
      expect.any(ConflictException),
    );
    expect(tbank.getOpenAccounts).not.toHaveBeenCalled();
  });

  it('normalizes supported accounts and ignores unsupported ones', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockResolvedValue([
      {
        id: 'brokerage',
        type: 'ACCOUNT_TYPE_TINKOFF',
        name: ' Основной ',
        openedDate: { seconds: '1723507200' },
      },
      {
        id: 'debit',
        type: 'ACCOUNT_TYPE_DEBIT',
        name: 'Дебетовый',
      },
      {
        id: 'iis',
        type: 'ACCOUNT_TYPE_TINKOFF_IIS',
        name: ' ',
      },
    ]);

    await expect(service.list('user-1')).resolves.toEqual([
      {
        id: 'brokerage',
        type: 'BROKERAGE',
        name: 'Основной',
        openedOn: '2024-08-13',
        portfolioSummary: { totalsByCurrency: [] },
      },
      {
        id: 'iis',
        type: 'INDIVIDUAL_INVESTMENT',
        name: 'ИИС',
        openedOn: null,
        portfolioSummary: { totalsByCurrency: [] },
      },
    ]);
  });

  it('keeps upstream order and adds exact summaries without loading metadata', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockResolvedValue([
      { id: 'first', type: 'ACCOUNT_TYPE_TINKOFF', name: 'Первый' },
      { id: 'second', type: 'ACCOUNT_TYPE_TINKOFF_IIS', name: 'Второй' },
    ]);
    tbank.getPortfolio
      .mockResolvedValueOnce({
        positions: [
          {
            quantity: { units: 2 },
            currentPrice: { currency: 'rub', units: 3 },
          },
        ],
      })
      .mockResolvedValueOnce({ positions: [] });
    tbank.getPositions
      .mockResolvedValueOnce({ money: [{ currency: 'RUB', nano: 500000000 }] })
      .mockResolvedValueOnce({ money: [{ currency: 'USD', units: 4 }] });

    await expect(service.list('user-1')).resolves.toEqual([
      {
        id: 'first',
        type: 'BROKERAGE',
        name: 'Первый',
        openedOn: null,
        portfolioSummary: {
          totalsByCurrency: [{ currency: 'RUB', value: '6.5' }],
        },
      },
      {
        id: 'second',
        type: 'INDIVIDUAL_INVESTMENT',
        name: 'Второй',
        openedOn: null,
        portfolioSummary: {
          totalsByCurrency: [{ currency: 'USD', value: '4' }],
        },
      },
    ]);
    expect(tbank.getPortfolio).toHaveBeenCalledWith('token', 'first');
    expect(tbank.getPositions).toHaveBeenCalledWith('token', 'second');
  });

  it('localizes an unavailable summary without suppressing another account', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockResolvedValue([
      { id: 'unavailable', type: 'ACCOUNT_TYPE_TINKOFF', name: 'Первый' },
      { id: 'available', type: 'ACCOUNT_TYPE_TINKOFF', name: 'Второй' },
    ]);
    tbank.getPortfolio
      .mockRejectedValueOnce(
        new ServiceUnavailableException({ code: 'TBANK_UNAVAILABLE' }),
      )
      .mockResolvedValueOnce({ positions: [] });
    tbank.getPositions.mockResolvedValue({ money: [] });

    await expect(service.list('user-1')).resolves.toMatchObject([
      { id: 'unavailable', portfolioSummary: null },
      { id: 'available', portfolioSummary: { totalsByCurrency: [] } },
    ]);
  });

  it('does not mask an invalid token when the other summary input is unavailable', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockResolvedValue([
      { id: 'account', type: 'ACCOUNT_TYPE_TINKOFF', name: 'Основной' },
    ]);
    tbank.getPortfolio.mockRejectedValue(
      new ServiceUnavailableException({ code: 'TBANK_UNAVAILABLE' }),
    );
    tbank.getPositions.mockRejectedValue(new Error('INVALID_TBANK_TOKEN'));

    await expect(service.list('user-1')).rejects.toEqual(
      expect.any(BadRequestException),
    );
  });

  it('retains the connection when T-Bank rejects its token', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockRejectedValue(new Error('INVALID_TBANK_TOKEN'));

    await expect(service.list('user-1')).rejects.toEqual(
      expect.any(BadRequestException),
    );
  });

  it('returns an empty list from T-Bank unchanged', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockResolvedValue([]);

    await expect(service.list('user-1')).resolves.toEqual([]);
  });

  it('propagates an unavailable T-Bank response', async () => {
    prisma.tbankConnection.findUnique.mockResolvedValue({
      encryptedToken: tokens.encrypt('token'),
    });
    tbank.getOpenAccounts.mockRejectedValue(
      new ServiceUnavailableException({ code: 'TBANK_UNAVAILABLE' }),
    );

    await expect(service.list('user-1')).rejects.toEqual(
      expect.any(ServiceUnavailableException),
    );
  });
});