import { expect } from 'chai' import u from '../lib' describe('u.reject', () => { it('can reject by index', () => { const result = u.reject((_, index) => index === 1, [3, 4, 5]) expect(result).to.eql([3, 5]) }) it('can reject with callback shorthand', () => { const result = u.reject('bad', [{ bad: true }, { bad: false }]) expect(result).to.eql([{ bad: false }]) }) it("returns the same instance if reject doesn't make changes", () => { const object = { foo: [1, 2, 3] } const result = u( { foo: u.reject(x => x === 'Justin Bieber'), }, object ) expect(result).to.equal(object) }) it('returns a different instance if reject makes changes', () => { const object = { foo: [1, 2, 3, 4] } const result = u( { foo: u.reject(x => x === 4), }, object ) expect(result).to.not.equal(object) }) it('freezes the result', () => { expect(Object.isFrozen(u.reject('a', []))).to.be.true }) })