tf2wikipricing/__tests__/formatting.test.ts

import { describe, it, expect, test, jest, mock, beforeEach } from "bun:test";
import { formatPrice } from '../src/content/utils/formatting';
import { $T } from '../src/content/utils/localization';

mock.module('../src/content/utils/localization', () => ({
    $T: mock((str) => str)
}));

mock.module('../src/content/config', () => ({
    conversion_ref_usd: 0.05 // Mock conversion rate
}))

describe('formatPrice', () => {
    beforeEach(() => {
      jest.clearAllMocks()
    });

    test('formats price with keys and metal', () => {
        expect(formatPrice(2, 10, 50)).toBe('2.2 keys (US$5.50)');
        expect($T).toHaveBeenCalledWith('%@ keys');
    });

    test('formats price with metal only', () => {
        expect(formatPrice(0, 15.75, 50)).toBe('15.75 ref (US$0.79)');
    });

    test('formats price with metal only and whole number', () => {
        expect(formatPrice(0, 3, 50)).toBe('3 ref (US$0.16)');
    });

    test('uses singular key form', () => {
        expect(formatPrice(1, 0, 50)).toBe('1 key (US$2.50)');
        expect($T).toHaveBeenCalledWith('%@ key');
    });

    test('rounds USD up to nearest cent', () => {
        expect(formatPrice(3, 7.33, 35)).toBe('3.21 keys (US$5.62)');  // (3*35 +7.33)*0.05 = 5.6165  → 5.62
    });

    test('handles different locale formatting', () => {
        expect(formatPrice(2, 10, 50, 'de')).toMatch(/2,2 keys \(US\$5,50\)/);
        expect(formatPrice(0, 15.75, 50, 'de')).toMatch(/15,75 ref \(US\$0,79\)/);
    });

    test('handles zero values', () => {
        expect(formatPrice(0, 0, 50)).toBe('0 ref (US$0.00)');
        expect(formatPrice(0, 0, 50, 'de')).toMatch(/0 ref \(US\$0,00\)/);
    });
});