payment-integration.test.ts

/**
 * Payment Integration Tests
 * These tests demonstrate the payment processing flow
 */

import { Test, TestingModule } from '@nestjs/testing';
import { Repository } from 'typeorm';
import { getRepositoryToken } from '@nestjs/typeorm';
import { StellarService } from '../stellar/stellar.service';
import { PaymentProcessorService } from '../payments/payment-processor.service';
import { PaymentGateway } from '../websocket/payment.gateway';
import { Payment } from '../entities/payment.entity';
import { Participant } from '../entities/participant.entity';
import { Split } from '../entities/split.entity';

describe('Payment Integration Tests', () => {
  let service: PaymentProcessorService;
  let stellarService: StellarService;
  let paymentGateway: PaymentGateway;

  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      providers: [
        PaymentProcessorService,
        {
          provide: StellarService,
          useValue: {
            verifyTransaction: jest.fn(),
          },
        },
        {
          provide: PaymentGateway,
          useValue: {
            emitPaymentNotification: jest.fn(),
            emitSplitCompletion: jest.fn(),
          },
        },
        {
          provide: getRepositoryToken(Payment),
          useClass: Repository,
        },
        {
          provide: getRepositoryToken(Participant),
          useClass: Repository,
        },
        {
          provide: getRepositoryToken(Split),
          useClass: Repository,
        },
      ],
    }).compile();

    service = module.get<PaymentProcessorService>(PaymentProcessorService);
    stellarService = module.get<StellarService>(StellarService);
    paymentGateway = module.get<PaymentGateway>(PaymentGateway);
  });

  it('should process a complete payment', async () => {
    // Mock the Stellar service to return a valid transaction
    jest.spyOn(stellarService, 'verifyTransaction').mockResolvedValue({
      valid: true,
      amount: 50.00,
      asset: 'XLM-USDC',
      sender: 'GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN',
      receiver: 'GBRPYHIL2CI3FNQ4BXLFMNDLFJUNPU2HY3ZMFSHONUCEOASW7QC7OX2H',
      timestamp: '2023-01-01T00:00:00Z',
    });

    // In a real test, we would mock repository methods and test the full flow
    expect(service).toBeDefined();
  });

  it('should handle partial payments', async () => {
    // Mock a transaction with amount less than owed
    jest.spyOn(stellarService, 'verifyTransaction').mockResolvedValue({
      valid: true,
      amount: 25.00, // Less than owed amount
      asset: 'XLM-USDC',
      sender: 'GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN',
      receiver: 'GBRPYHIL2CI3FNQ4BXLFMNDLFJUNPU2HY3ZMFSHONUCEOASW7QC7OX2H',
      timestamp: '2023-01-01T00:00:00Z',
    });

    expect(service).toBeDefined();
  });

  it('should reject invalid transactions', async () => {
    // Mock an invalid transaction
    jest.spyOn(stellarService, 'verifyTransaction').mockResolvedValue({
      valid: false,
      amount: 0,
      asset: '',
      sender: '',
      receiver: '',
      timestamp: '2023-01-01T00:00:00Z',
    });

    expect(service).toBeDefined();
  });

  it('should prevent duplicate transactions', async () => {
    // This test would verify that the service prevents duplicate submissions
    expect(service).toBeDefined();
  });
});