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@leafygreen-ui/date-utils

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import { normalizeLocale } from '.'; describe('packages/date-utils/normalizeLocale', () => { test('pass through valid locale', () => { expect(normalizeLocale('de-DE')).toBe('de-DE'); }); test('resolve invalid locale to system', () => { expect(normalizeLocale('asdf')).toBe('en-US'); }); test('resolve undefined to system', () => { expect(normalizeLocale()).toBe('en-US'); }); });