Oli Sturm
87 lines
2.9 KiB
JavaScript
87 lines
2.9 KiB
JavaScript
import { describe, it, expect } from 'vitest';
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import { createWithdrawMoney } from '../js-fp3/application/accountApp.js';
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import { openAccount } from '../js-fp3/domain/account.js';
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import { createMoney } from '../js-fp3/domain/money.js';
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import { createInMemoryRepository } from '../js-fp3/infrastructure/repository.js';
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const buildHandler = () => {
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const repo = createInMemoryRepository();
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const withdraw = createWithdrawMoney(repo).value;
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return { withdraw, repo };
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};
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describe('withdrawMoney application use case', () => {
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it('withdrawing from an account reduces its balance by the withdrawn amount', () => {
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const { withdraw, repo } = buildHandler();
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const accountId = 'acc-1';
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repo.saveAccount(openAccount(accountId, createMoney(200)).value);
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withdraw(accountId, 75);
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const account = repo.loadAccount(accountId).value;
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expect(account.balance.amount).toBe(125);
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});
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it('withdrawing the entire balance leaves the account at zero', () => {
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const { withdraw, repo } = buildHandler();
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const accountId = 'acc-2';
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repo.saveAccount(openAccount(accountId, createMoney(100)).value);
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withdraw(accountId, 100);
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const account = repo.loadAccount(accountId).value;
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expect(account.balance.amount).toBe(0);
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});
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it('withdrawing from a non-existent account returns accountNotFound', () => {
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const { withdraw } = buildHandler();
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const result = withdraw('no-such-id', 50);
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expect(result.error.type).toBe('AccountNotFound');
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});
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it('withdrawing more than the available balance returns insufficientBalance', () => {
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const { withdraw, repo } = buildHandler();
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const accountId = 'acc-3';
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repo.saveAccount(openAccount(accountId, createMoney(50)).value);
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const result = withdraw(accountId, 100);
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expect(result.error.type).toBe('InsufficientBalance');
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});
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it('accountNotFound error reports the requested account id', () => {
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const { withdraw } = buildHandler();
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const accountId = 'missing-acc';
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const error = withdraw(accountId, 50).error;
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expect(error.type).toBe('AccountNotFound');
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expect(error.accountId).toBe(accountId);
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});
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it('insufficientBalance error reports the current balance and attempted amount', () => {
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const { withdraw, repo } = buildHandler();
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const accountId = 'acc-4';
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repo.saveAccount(openAccount(accountId, createMoney(50)).value);
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const error = withdraw(accountId, 120).error;
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expect(error.type).toBe('InsufficientBalance');
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expect(error.balance.amount).toBe(50);
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expect(error.amount.amount).toBe(120);
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});
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it('after a failed withdrawal the balance is unchanged', () => {
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const { withdraw, repo } = buildHandler();
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const accountId = 'acc-5';
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repo.saveAccount(openAccount(accountId, createMoney(50)).value);
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withdraw(accountId, 999);
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const account = repo.loadAccount(accountId).value;
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expect(account.balance.amount).toBe(50);
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});
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});
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