cra-template-rb/template/src/styles/theme/__tests__/utils.test.ts

The official React Boilerplate template for Create React App

import * as utils from '../utils';

describe('theme utils', () => {
  it('should get storage item', () => {
    utils.saveTheme('system');
    expect(utils.getThemeFromStorage()).toBe('system');
  });
  it('should check system theme', () => {
    expect(utils.isSystemDark).toBeUndefined();
  });
});