@shopify/polaris/esnext/utilities/i18n/tests/I18n.js

Shopify’s product component library

import { translate } from '../I18n';
describe('translate()', () => {
    it('returns a simple string value in the translation dictionary', () => {
        expect(translate('foo', { foo: 'bar' })).toBe('bar');
    });
    it('returns a nested string value in the translation dictionary', () => {
        expect(translate('foo.bar.baz', { foo: { bar: { baz: 'qux' } } })).toBe('qux');
    });
    it('returns an empty string when no match is found', () => {
        expect(translate('foo.bar.baz', { foo: { bar: 'baz' } })).toBe('');
    });
    describe('replacements', () => {
        function translateWithReplacements(id, replacements) {
            return translate('value', { value: id }, replacements);
        }
        it('uses replacements', () => {
            expect(translateWithReplacements('foo {next}', { next: 'bar' })).toBe('foo bar');
        });
        it('throws an error for a missing replacement', () => {
            expect(() => translateWithReplacements('foo {next}', { notNext: 'bar' })).toThrow(`No replacement found for key 'next'. The following replacements were passed: 'notNext'`);
        });
    });
});