/** * @license * Copyright Google LLC All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import {stringify} from '../src/util/stringify'; { describe('stringify', () => { it('should return string undefined when toString returns undefined', () => expect(stringify({toString: (): any => undefined})).toBe('undefined')); it('should return string null when toString returns null', () => expect(stringify({toString: (): any => null})).toBe('null')); }); }