87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
import {
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PortfolioDto,
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PortfolioPositionDto,
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} from '../../../portfolio/presentation/portfolio.dto';
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import { stockPosition } from './stock-position';
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const money = (value: string, currency = 'RUB') => ({ value, currency });
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const row = (
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quantity = '2',
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average = '10',
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value = '30',
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uid = 'common',
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): PortfolioPositionDto => ({
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instrumentUid: uid,
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figi: uid,
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displayName: uid,
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type: 'STOCK',
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quantity,
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averagePurchasePrice: money(average),
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currentValue: money(value),
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absoluteReturn: money('10'),
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isin: null,
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ticker: null,
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logoName: null,
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});
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const portfolio = (positions: PortfolioPositionDto[]): PortfolioDto => ({
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positions,
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cashBalances: [],
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totalsByCurrency: [],
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isStale: false,
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lastSuccessfulAt: '2026-09-10T00:00:00Z',
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structure: { currencies: [], unvaluedCategories: [] },
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});
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describe('stock position', () => {
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it('weights costs exactly and keeps preferred shares separate', () => {
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const result = stockPosition(
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portfolio([
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row(),
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row('3', '20', '70'),
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row('100', '1', '100', 'preferred'),
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]),
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'common',
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);
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expect(result.quantity).toBe('5');
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expect(result.averagePurchasePrice).toEqual(money('16'));
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expect(result.currentValue).toEqual(money('100'));
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expect(result.absoluteReturn).toEqual(money('20'));
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expect(result.returnPercent).toBe('25');
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expect(result.accounts[0].returnPercent).toBe('50');
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});
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it('does not round large amounts through floating point', () => {
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const result = stockPosition(
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portfolio([row('9007199254740993', '0.1', '900719925474099.3')]),
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'common',
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);
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expect(result.quantity).toBe('9007199254740993');
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expect(result.averagePurchasePrice?.value).toBe('0.1');
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});
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it('does not sum currencies or treat unknown values as zero', () => {
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const second = {
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...row(),
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currentValue: money('2', 'USD'),
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averagePurchasePrice: null,
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absoluteReturn: null,
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};
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const result = stockPosition(portfolio([row(), second]), 'common');
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expect(result.quantity).toBe('4');
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expect(result.currentValue).toBeNull();
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expect(result.averagePurchasePrice).toBeNull();
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expect(result.absoluteReturn).toBeNull();
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expect(result.returnPercent).toBeNull();
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});
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it('keeps no-position and offsetting long/short holdings honest', () => {
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expect(stockPosition(portfolio([]), 'common')).toMatchObject({
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quantity: '0',
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accounts: [],
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currentValue: null,
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returnPercent: null,
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});
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expect(
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stockPosition(portfolio([row(), row('-2')]), 'common')
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.averagePurchasePrice,
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).toBeNull();
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});
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});
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