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import { setLanguage } from 'helpers/locale_helper';
import { createDateTimeFormat, formatNumber, languageCode } from '~/locale';
describe('locale', () => {
afterEach(() => setLanguage(null));
describe('languageCode', () => {
it('parses the lang attribute', () => {
setLanguage('ja');
expect(languageCode()).toBe('ja');
});
it('falls back to English', () => {
setLanguage(null);
expect(languageCode()).toBe('en');
});
});
describe('createDateTimeFormat', () => {
beforeEach(() => setLanguage('en'));
it('creates an instance of Intl.DateTimeFormat', () => {
const dateFormat = createDateTimeFormat({ year: 'numeric', month: 'long', day: 'numeric' });
expect(dateFormat.format(new Date(2015, 6, 3))).toBe('July 3, 2015');
});
});
describe('formatNumber', () => {
it('formats numbers', () => {
expect(formatNumber(1)).toBe('1');
expect(formatNumber(12345)).toBe('12,345');
});
it('formats bigint numbers', () => {
expect(formatNumber(123456789123456789n)).toBe('123,456,789,123,456,789');
});
it('formats numbers with options', () => {
expect(formatNumber(1, { style: 'percent' })).toBe('100%');
expect(formatNumber(1, { style: 'currency', currency: 'USD' })).toBe('$1.00');
});
it('formats localized numbers', () => {
expect(formatNumber(12345, {}, 'es')).toBe('12.345');
});
it('formats NaN', () => {
expect(formatNumber(NaN)).toBe('NaN');
});
it('formats infinity', () => {
expect(formatNumber(Number.POSITIVE_INFINITY)).toBe('∞');
});
it('formats negative infinity', () => {
expect(formatNumber(Number.NEGATIVE_INFINITY)).toBe('-∞');
});
it('formats EPSILON', () => {
expect(formatNumber(Number.EPSILON)).toBe('0');
});
describe('non-number values should pass through', () => {
it('undefined', () => {
expect(formatNumber(undefined)).toBe(undefined);
});
it('null', () => {
expect(formatNumber(null)).toBe(null);
});
it('arrays', () => {
expect(formatNumber([])).toEqual([]);
});
it('objects', () => {
expect(formatNumber({ a: 'b' })).toEqual({ a: 'b' });
});
});
describe('when in a different locale', () => {
beforeEach(() => {
setLanguage('es');
});
it('formats localized numbers', () => {
expect(formatNumber(12345)).toBe('12.345');
});
});
});
});
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