v0.0.01b

src/lib/format.test.ts

@@ -0,0 +1,109 @@
+import { describe, it, expect } from 'vitest';
+import {
+  DURATION_OPTIONS,
+  calculatePricing,
+  durationByDays,
+  pluralize,
+  round2,
+  sumAddonPrices,
+  devicesLabel,
+  formatMoney,
+} from './format';
+import type { AddonData, PricingPlans } from '../types';
+
+const pricing: PricingPlans = {
+  device_price: 100,
+  addons: [
+    { id: 'a', name: 'A', price: 50, free_threshold: 0 },
+    { id: 'b', name: 'B', price: 30, free_threshold: 0 },
+  ],
+};
+
+describe('round2', () => {
+  it('rounds to two decimals', () => {
+    expect(round2(1.005)).toBe(1.01);
+    expect(round2(2.345)).toBe(2.35);
+    expect(round2(10)).toBe(10);
+  });
+});
+
+describe('sumAddonPrices', () => {
+  const addons: AddonData[] = pricing.addons;
+  it('sums selected addon prices', () => {
+    expect(sumAddonPrices(addons, ['a', 'b'])).toBe(80);
+    expect(sumAddonPrices(addons, ['a'])).toBe(50);
+    expect(sumAddonPrices(addons, ['unknown'])).toBe(0);
+    expect(sumAddonPrices(addons, [])).toBe(0);
+  });
+});
+
+describe('calculatePricing', () => {
+  it('computes linear device cost + addons + duration total', () => {
+    const r = calculatePricing({
+      pricing,
+      devices: 6,
+      addonIds: ['a'],
+      duration: DURATION_OPTIONS[1]!, // 90 days
+    });
+    // monthly = 6*100 + 50 = 650
+    // total = 650 * 90 / 30 = 1950
+    expect(r.deviceCost).toBe(600);
+    expect(r.addonCost).toBe(50);
+    expect(r.monthly).toBe(650);
+    expect(r.periodTotal).toBe(1950);
+  });
+
+  it('handles 1 month / 30 days', () => {
+    const r = calculatePricing({
+      pricing,
+      devices: 3,
+      addonIds: [],
+      duration: DURATION_OPTIONS[0]!,
+    });
+    expect(r.monthly).toBe(300);
+    expect(r.periodTotal).toBe(300);
+  });
+
+  it('12 months / 365 days yields near 12x', () => {
+    const r = calculatePricing({
+      pricing,
+      devices: 1,
+      addonIds: [],
+      duration: DURATION_OPTIONS[3]!,
+    });
+    // monthly=100, total = 100 * 365/30 = 1216.67
+    expect(r.periodTotal).toBeCloseTo(1216.67, 1);
+  });
+});
+
+describe('durationByDays', () => {
+  it('finds duration by days', () => {
+    expect(durationByDays(30).months).toBe(1);
+    expect(durationByDays(90).months).toBe(3);
+    expect(durationByDays(180).months).toBe(6);
+    expect(durationByDays(365).months).toBe(12);
+  });
+  it('falls back to first option for unknown days', () => {
+    expect(durationByDays(7).months).toBe(1);
+  });
+});
+
+describe('pluralize / devicesLabel', () => {
+  it('picks correct form', () => {
+    expect(pluralize(1, 'устройство', 'устройства', 'устройств')).toBe('устройство');
+    expect(pluralize(2, 'устройство', 'устройства', 'устройств')).toBe('устройства');
+    expect(pluralize(5, 'устройство', 'устройства', 'устройств')).toBe('устройств');
+    expect(pluralize(11, 'устройство', 'устройства', 'устройств')).toBe('устройств');
+  });
+  it('devicesLabel combines number and noun', () => {
+    expect(devicesLabel(3)).toBe('3 устройства');
+    expect(devicesLabel(6)).toBe('6 устройств');
+  });
+});
+
+describe('formatMoney', () => {
+  it('formats rubles', () => {
+    expect(formatMoney(100)).toMatch(/100/);
+    expect(formatMoney(1950)).toMatch(/1\s950/);
+  });
+});