@andreasnicolaou/country-kit/dist/index.test.js

A comprehensive package for working with country data. Includes ISO codes, names in multiple languages, capitals, currencies, continents and more.

import { CountryKit } from './index';
describe('CountryKit  ', () => {
    test('countries() should return all countries', () => {
        const result = CountryKit.getAllCountries();
        expect(result).toBeDefined();
        expect(typeof result).toBe('object');
        expect(Object.keys(result).length).toBeGreaterThan(0);
    });
    test('countryByCode() should return the correct country', () => {
        const country = CountryKit.getCountryByCode('us');
        expect(country).toBeDefined();
        expect(country?.code).toBe('US');
        expect(country?.name).toBe('United States');
    });
    test('countriesByCurrency() should return countries using given currency', () => {
        const usdCountries = CountryKit.getCountriesByCurrency('USD');
        expect(usdCountries.length).toBeGreaterThan(0);
        expect(usdCountries.some((c) => c.currency.some((curr) => curr.code === 'USD'))).toBe(true);
    });
    test('countriesByCurrency() should be case-insensitive', () => {
        const lower = CountryKit.getCountriesByCurrency('usd');
        const upper = CountryKit.getCountriesByCurrency('USD');
        expect(lower).toEqual(upper);
    });
    test('filterByContinent() should return countries in the given continent', () => {
        const asianCountries = CountryKit.getCountriesByContinent('Asia');
        expect(asianCountries.length).toBeGreaterThan(0);
        expect(asianCountries.every((c) => c.continent === 'Asia')).toBe(true);
    });
    test('filterByContinent() should be case-insensitive', () => {
        const lower = CountryKit.getCountriesByContinent('asia');
        const upper = CountryKit.getCountriesByContinent('ASIA');
        expect(lower).toEqual(upper);
    });
    test('filterByLanguages() should return countries speaking the given language', () => {
        const spanishCountries = CountryKit.getCountriesByLanguage('Spanish');
        expect(spanishCountries.length).toBeGreaterThan(0);
        expect(spanishCountries.some((c) => c.languages.includes('Spanish'))).toBe(true);
    });
    test('filterByLanguages() should be case-insensitive', () => {
        const lower = CountryKit.getCountriesByLanguage('spanish');
        const upper = CountryKit.getCountriesByLanguage('SPANISH');
        expect(lower).toEqual(upper);
    });
});