actual-mcp

import { describe, it, expect } from 'vitest'; import { GroupAggregator } from './group-by.js'; import type { CategorySpending } from '../types/domain.js'; describe('GroupAggregator', () => { const aggregator = new GroupAggregator(); it('should aggregate and sort spending by group', () => { const input: Record<string, CategorySpending> = { cat1: { id: '1', name: 'Food', group: 'Living', isIncome: false, total: -100, transactions: 5, }, cat2: { id: '2', name: 'Rent', group: 'Living', isIncome: false, total: -800, transactions: 1, }, cat3: { id: '3', name: 'Salary', group: 'Income', isIncome: true, total: 2000, transactions: 1, }, }; const result = aggregator.aggregateAndSort(input); expect(result).toHaveLength(2); expect(result[0].name).toBe('Income'); // Highest absolute value expect(result[0].total).toBe(2000); expect(result[0].categories).toHaveLength(1); expect(result[1].name).toBe('Living'); expect(result[1].total).toBe(-900); expect(result[1].categories).toHaveLength(2); }); it('should handle empty input', () => { const result = aggregator.aggregateAndSort({}); expect(result).toEqual([]); }); it('should sort categories within groups by absolute total', () => { const input: Record<string, CategorySpending> = { cat1: { id: '1', name: 'Food', group: 'Living', isIncome: false, total: -100, transactions: 5, }, cat2: { id: '2', name: 'Rent', group: 'Living', isIncome: false, total: -800, transactions: 1, }, cat3: { id: '3', name: 'Utilities', group: 'Living', isIncome: false, total: -200, transactions: 3, }, }; const result = aggregator.aggregateAndSort(input); expect(result).toHaveLength(1); expect(result[0].name).toBe('Living'); expect(result[0].categories).toHaveLength(3); // Should be sorted by absolute total: Rent (-800), Utilities (-200), Food (-100) expect(result[0].categories[0].name).toBe('Rent'); expect(result[0].categories[1].name).toBe('Utilities'); expect(result[0].categories[2].name).toBe('Food'); }); it('should handle single category', () => { const input: Record<string, CategorySpending> = { cat1: { id: '1', name: 'Food', group: 'Living', isIncome: false, total: -100, transactions: 5, }, }; const result = aggregator.aggregateAndSort(input); expect(result).toHaveLength(1); expect(result[0].name).toBe('Living'); expect(result[0].total).toBe(-100); expect(result[0].categories).toHaveLength(1); expect(result[0].categories[0].name).toBe('Food'); }); it('should handle positive and negative amounts correctly', () => { const input: Record<string, CategorySpending> = { cat1: { id: '1', name: 'Salary', group: 'Income', isIncome: true, total: 3000, transactions: 1, }, cat2: { id: '2', name: 'Bonus', group: 'Income', isIncome: true, total: 1000, transactions: 1, }, cat3: { id: '3', name: 'Food', group: 'Living', isIncome: false, total: -500, transactions: 10, }, }; const result = aggregator.aggregateAndSort(input); expect(result).toHaveLength(2); expect(result[0].name).toBe('Income'); // 4000 absolute value expect(result[0].total).toBe(4000); expect(result[1].name).toBe('Living'); // 500 absolute value expect(result[1].total).toBe(-500); }); it('should build an id lookup map', () => { const lookup = aggregator.byId([ { id: '1', name: 'First' }, { id: '2', name: 'Second' }, ]); expect(lookup['1']).toEqual({ id: '1', name: 'First' }); expect(lookup['2']).toEqual({ id: '2', name: 'Second' }); }); });