Stan Runge
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46 lines
1.9 KiB
TypeScript
46 lines
1.9 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { parseCents, parseSize, priceInput, unitPriceCents } from './groceries';
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import { cheapestStores, formatCents } from '../groceries';
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describe('groceries helpers', () => {
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it('parses prices into cents', () => {
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expect(parseCents('1,79')).toBe(179);
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expect(parseCents('€ 2.5')).toBe(250);
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expect(parseCents('3')).toBe(300);
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expect(parseCents('abc')).toBeNull();
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expect(parseCents('1,234')).toBeNull();
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});
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it('parses pack sizes', () => {
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expect(parseSize('1 L')).toEqual({ amount: 1, unit: 'l' });
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expect(parseSize('6 x 1 L')).toEqual({ amount: 6, unit: 'l' });
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expect(parseSize('500 g')).toEqual({ amount: 0.5, unit: 'kg' });
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expect(parseSize('750ml')).toEqual({ amount: 0.75, unit: 'l' });
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expect(parseSize('4 stuks')).toEqual({ amount: 4, unit: 'piece' });
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expect(parseSize('1,5 liter')).toEqual({ amount: 1.5, unit: 'l' });
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expect(parseSize('a bunch')).toBeNull();
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});
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it('computes unit prices', () => {
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expect(unitPriceCents(479, 6)).toBe(80);
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expect(unitPriceCents(100, null)).toBeNull();
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});
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it('validates price input', () => {
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expect(priceInput.safeParse({ price: '1,29' }).data?.price).toBe(129);
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expect(priceInput.safeParse({ price: 'x' }).success).toBe(false);
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expect(priceInput.safeParse({ price: '1', url: '' }).success).toBe(true);
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});
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it('finds the cheapest store', () => {
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const p = (storeId: number, priceCents: number, unitPriceCents: number | null) => ({
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storeId,
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priceCents,
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unitPriceCents,
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promo: false,
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observedAt: new Date()
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});
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expect([...cheapestStores([p(1, 179, 179), p(2, 129, 129)])]).toEqual([2]);
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expect([...cheapestStores([p(1, 479, 80), p(2, 129, 129)])]).toEqual([1]);
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expect([...cheapestStores([p(1, 479, null), p(2, 129, 129)])]).toEqual([2]);
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expect(cheapestStores([p(1, 100, null)]).size).toBe(0);
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expect(formatCents(179).replace(/\s/g, ' ')).toBe('€ 1,79');
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});
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});
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