updeep-remeda/test/updateIn-spec.js
2020-04-02 15:16:13 +01:00

62 lines
1.9 KiB
JavaScript

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 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
})
it('can multiple elements of an array with *', () => {
let object = { a: [{ b: 0 }, { b: 1 }, { b: 2 }] }
let result = u.updateIn('a.*.b', (x) => x + 1, object)
expect(result).to.eql({ a: [{ b: 1 }, { b: 2 }, { b: 3 }] })
object = { a: [0, 1, 2] }
result = u.updateIn(['a', '*'], (x) => x + 1, object)
expect(result).to.eql({ a: [1, 2, 3] })
})
it('can update properties named *', () => {
const object = { '*': 1, x: 1 }
const result = u.updateIn('*', (x) => x + 1, object)
expect(result).to.eql({ '*': 2, x: 1 })
})
})