GetAccountByUserId.unit.ts

import { GetAccountByUserId } from './GetAccountByUserId';
import { Request, Response } from './GetAccountByUserIdDTOs';
import { AccountRepoFake, UserId } from '../../repos/AccountRepoFake';
import { getAppSyncEvent as getEvent } from '../../../../shared/utils/test';
import { Envelope } from '../../../../shared/core/Envelope';
import { BaseError } from '../../../../shared/core/AppError';

let accountRepo, getAccountByUserId: GetAccountByUserId;
beforeAll(() => {
  accountRepo = new AccountRepoFake();
  getAccountByUserId = new GetAccountByUserId(accountRepo);
});

it('gets an account', async () => {
  const validData: Request = {
    userId: UserId.GOOD,
  };

  const response = (await getAccountByUserId.execute(
    getEvent(validData)
  )) as Envelope<Response>;

  expect(response.result?.balance).toBe(100); // faked balance is 100
});

it(`fails when userId isn't an uuid`, async () => {
  const badData = {
    userId: 'not a uuid',
  };

  const result = (await getAccountByUserId.execute(
    getEvent(badData)
  )) as Envelope<BaseError>;

  expect(result.errorType).toBe('GetAccountByUserIdErrors.UserIdNotUuid');
});

it(`fails when account isn't found`, async () => {
  const validData: Request = {
    userId: UserId.NO_TRANSACTIONS,
  };

  const response = (await getAccountByUserId.execute(
    getEvent(validData)
  )) as Envelope<BaseError>;

  expect(response.errorType).toBe('GetAccountByUserIdErrors.AccountNotFound');
});