import { expect } from 'chai'; import u from '../lib'; describe('u.updateIn', () => { it('can update a single path described with a string', () => { const object = { a: { b: 0 } }; const result = u.updateIn('a.b', 3, object); expect(result).to.eql({ a: { b: 3 } }); }); it('can update a single path described with a string with a function', () => { const inc = x => x + 1; const object = { a: { b: 0 } }; const result = u.updateIn('a.b', inc, object); expect(result).to.eql({ a: { b: 1 } }); }); it('can update a single path described with an array', () => { const object = { a: { b: 0 } }; const result = u.updateIn(['a', 'b'], 3, object); expect(result).to.eql({ a: { b: 3 } }); }); it('can update arrays', () => { const object = { a: [0, 0, 0] }; const result = u.updateIn('a.1', 3, object); expect(result).to.eql({ a: [0, 3, 0] }); }); it('can create array if all keys are numbers', () => { const result = u.updateIn('a.0', 3, null); expect(result).to.eql({ a: [3] }); }); it('can be partially applied', () => { const object = { a: { b: 0 } }; const result = u.updateIn('a.b')(3)(object); expect(result).to.eql({ a: { b: 3 } }); }); it('replaces the object outright if the path is empty', () => { const object = {}; const result = u.updateIn('', 3, object); expect(result).to.equal(3); }); it('freezes the result', () => { expect(Object.isFrozen(u.updateIn('a', 0, {}))).to.be.true; }); });