'use strict'
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const { test } = require('tap')
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const rfdc = require('..')
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const cloneDefault = require('../default')
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const clone = rfdc()
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const cloneProto = rfdc({ proto: true })
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const cloneCircles = rfdc({ circles: true })
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const cloneCirclesProto = rfdc({ circles: true, proto: true })
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const rnd = (max) => Math.round(Math.random() * max)
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types(clone, 'default')
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types(cloneProto, 'proto option')
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types(cloneCircles, 'circles option')
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types(cloneCirclesProto, 'circles and proto option')
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test('default – does not copy proto properties', async ({ is }) => {
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is(clone(Object.create({ a: 1 })).a, undefined, 'value not copied')
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})
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test('default – shorthand import', async ({ same }) => {
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same(
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clone(Object.create({ a: 1 })),
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cloneDefault(Object.create({ a: 1 })),
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'import equals clone with default options'
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)
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})
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test('proto option – copies enumerable proto properties', async ({ is }) => {
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is(cloneProto(Object.create({ a: 1 })).a, 1, 'value copied')
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})
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test('circles option - circular object', async ({ same, is, isNot }) => {
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const o = { nest: { a: 1, b: 2 } }
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o.circular = o
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same(cloneCircles(o), o, 'same values')
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isNot(cloneCircles(o), o, 'different objects')
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isNot(cloneCircles(o).nest, o.nest, 'different nested objects')
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const c = cloneCircles(o)
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is(c.circular, c, 'circular references point to copied parent')
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isNot(c.circular, o, 'circular references do not point to original parent')
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})
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test('circles option – deep circular object', async ({ same, is, isNot }) => {
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const o = { nest: { a: 1, b: 2 } }
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o.nest.circular = o
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same(cloneCircles(o), o, 'same values')
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isNot(cloneCircles(o), o, 'different objects')
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isNot(cloneCircles(o).nest, o.nest, 'different nested objects')
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const c = cloneCircles(o)
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is(c.nest.circular, c, 'circular references point to copied parent')
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isNot(
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c.nest.circular,
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o,
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'circular references do not point to original parent'
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)
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})
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test('circles option alone – does not copy proto properties', async ({
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is
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}) => {
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is(cloneCircles(Object.create({ a: 1 })).a, undefined, 'value not copied')
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})
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test('circles and proto option – copies enumerable proto properties', async ({
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is
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}) => {
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is(cloneCirclesProto(Object.create({ a: 1 })).a, 1, 'value copied')
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})
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test('circles and proto option - circular object', async ({
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same,
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is,
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isNot
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}) => {
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const o = { nest: { a: 1, b: 2 } }
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o.circular = o
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same(cloneCirclesProto(o), o, 'same values')
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isNot(cloneCirclesProto(o), o, 'different objects')
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isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
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const c = cloneCirclesProto(o)
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is(c.circular, c, 'circular references point to copied parent')
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isNot(c.circular, o, 'circular references do not point to original parent')
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})
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test('circles and proto option – deep circular object', async ({
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same,
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is,
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isNot
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}) => {
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const o = { nest: { a: 1, b: 2 } }
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o.nest.circular = o
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same(cloneCirclesProto(o), o, 'same values')
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isNot(cloneCirclesProto(o), o, 'different objects')
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isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
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const c = cloneCirclesProto(o)
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is(c.nest.circular, c, 'circular references point to copied parent')
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isNot(
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c.nest.circular,
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o,
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'circular references do not point to original parent'
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)
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})
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test('circles and proto option – deep circular array', async ({
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same,
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is,
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isNot
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}) => {
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const o = { nest: [1, 2] }
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o.nest.push(o)
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same(cloneCirclesProto(o), o, 'same values')
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isNot(cloneCirclesProto(o), o, 'different objects')
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isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
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const c = cloneCirclesProto(o)
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is(c.nest[2], c, 'circular references point to copied parent')
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isNot(c.nest[2], o, 'circular references do not point to original parent')
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})
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function types (clone, label) {
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test(label + ' – number', async ({ is }) => {
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is(clone(42), 42, 'same value')
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})
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test(label + ' – string', async ({ is }) => {
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is(clone('str'), 'str', 'same value')
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})
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test(label + ' – boolean', async ({ is }) => {
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is(clone(true), true, 'same value')
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})
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test(label + ' – function', async ({ is }) => {
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const fn = () => {}
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is(clone(fn), fn, 'same function')
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})
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test(label + ' – async function', async ({ is }) => {
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const fn = async () => {}
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is(clone(fn), fn, 'same function')
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})
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test(label + ' – generator function', async ({ is }) => {
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const fn = function * () {}
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is(clone(fn), fn, 'same function')
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})
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test(label + ' – date', async ({ is, isNot }) => {
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const date = new Date()
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is(+clone(date), +date, 'same value')
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isNot(clone(date), date, 'different object')
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})
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test(label + ' – null', async ({ is }) => {
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is(clone(null), null, 'same value')
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})
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test(label + ' – shallow object', async ({ same, isNot }) => {
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const o = { a: 1, b: 2 }
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same(clone(o), o, 'same values')
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isNot(clone(o), o, 'different object')
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})
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test(label + ' – shallow array', async ({ same, isNot }) => {
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const o = [1, 2]
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same(clone(o), o, 'same values')
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isNot(clone(o), o, 'different arrays')
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})
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test(label + ' – deep object', async ({ same, isNot }) => {
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const o = { nest: { a: 1, b: 2 } }
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same(clone(o), o, 'same values')
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isNot(clone(o), o, 'different objects')
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isNot(clone(o).nest, o.nest, 'different nested objects')
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})
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test(label + ' – deep array', async ({ same, isNot }) => {
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const o = [{ a: 1, b: 2 }, [3]]
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same(clone(o), o, 'same values')
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isNot(clone(o), o, 'different arrays')
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isNot(clone(o)[0], o[0], 'different array elements')
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isNot(clone(o)[1], o[1], 'different array elements')
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})
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test(label + ' – nested number', async ({ is }) => {
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is(clone({ a: 1 }).a, 1, 'same value')
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})
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test(label + ' – nested string', async ({ is }) => {
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is(clone({ s: 'str' }).s, 'str', 'same value')
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})
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test(label + ' – nested boolean', async ({ is }) => {
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is(clone({ b: true }).b, true, 'same value')
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})
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test(label + ' – nested function', async ({ is }) => {
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const fn = () => {}
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is(clone({ fn }).fn, fn, 'same function')
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})
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test(label + ' – nested async function', async ({ is }) => {
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const fn = async () => {}
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is(clone({ fn }).fn, fn, 'same function')
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})
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test(label + ' – nested generator function', async ({ is }) => {
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const fn = function * () {}
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is(clone({ fn }).fn, fn, 'same function')
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})
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test(label + ' – nested date', async ({ is, isNot }) => {
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const date = new Date()
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is(+clone({ d: date }).d, +date, 'same value')
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isNot(clone({ d: date }).d, date, 'different object')
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})
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test(label + ' – nested date in array', async ({ is, isNot }) => {
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const date = new Date()
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is(+clone({ d: [date] }).d[0], +date, 'same value')
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isNot(clone({ d: [date] }).d[0], date, 'different object')
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is(+cloneCircles({ d: [date] }).d[0], +date, 'same value')
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isNot(cloneCircles({ d: [date] }).d, date, 'different object')
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})
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test(label + ' – nested null', async ({ is }) => {
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is(clone({ n: null }).n, null, 'same value')
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})
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test(label + ' – arguments', async ({ isNot, same }) => {
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function fn (...args) {
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same(clone(arguments), args, 'same values')
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isNot(clone(arguments), arguments, 'different object')
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}
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fn(1, 2, 3)
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})
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test(`${label} copies buffers from object correctly`, async ({ ok, is, isNot }) => {
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const input = Date.now().toString(36)
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const inputBuffer = Buffer.from(input)
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const clonedBuffer = clone({ a: inputBuffer }).a
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ok(Buffer.isBuffer(clonedBuffer), 'cloned value is buffer')
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isNot(clonedBuffer, inputBuffer, 'cloned buffer is not same as input buffer')
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is(clonedBuffer.toString(), input, 'cloned buffer content is correct')
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})
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test(`${label} copies buffers from arrays correctly`, async ({ ok, is, isNot }) => {
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const input = Date.now().toString(36)
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const inputBuffer = Buffer.from(input)
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const [clonedBuffer] = clone([inputBuffer])
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ok(Buffer.isBuffer(clonedBuffer), 'cloned value is buffer')
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isNot(clonedBuffer, inputBuffer, 'cloned buffer is not same as input buffer')
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is(clonedBuffer.toString(), input, 'cloned buffer content is correct')
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})
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test(`${label} copies TypedArrays from object correctly`, async ({ ok, is, isNot }) => {
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const [input1, input2] = [rnd(10), rnd(10)]
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var buffer = new ArrayBuffer(8)
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const int32View = new Int32Array(buffer)
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int32View[0] = input1
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int32View[1] = input2
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const cloned = clone({ a: int32View }).a
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ok(cloned instanceof Int32Array, 'cloned value is instance of class')
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isNot(cloned, int32View, 'cloned value is not same as input value')
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is(cloned[0], input1, 'cloned value content is correct')
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is(cloned[1], input2, 'cloned value content is correct')
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})
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test(`${label} copies TypedArrays from array correctly`, async ({ ok, is, isNot }) => {
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const [input1, input2] = [rnd(10), rnd(10)]
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var buffer = new ArrayBuffer(16)
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const int32View = new Int32Array(buffer)
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int32View[0] = input1
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int32View[1] = input2
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const [cloned] = clone([int32View])
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ok(cloned instanceof Int32Array, 'cloned value is instance of class')
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isNot(cloned, int32View, 'cloned value is not same as input value')
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is(cloned[0], input1, 'cloned value content is correct')
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is(cloned[1], input2, 'cloned value content is correct')
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})
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test(`${label} copies complex TypedArrays`, async ({ ok, deepEqual, is, isNot }) => {
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const [input1, input2, input3] = [rnd(10), rnd(10), rnd(10)]
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var buffer = new ArrayBuffer(4)
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const view1 = new Int8Array(buffer, 0, 2)
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const view2 = new Int8Array(buffer, 2, 2)
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const view3 = new Int8Array(buffer)
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view1[0] = input1
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view2[0] = input2
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view3[3] = input3
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const cloned = clone({ view1, view2, view3 })
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ok(cloned.view1 instanceof Int8Array, 'cloned value is instance of class')
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ok(cloned.view2 instanceof Int8Array, 'cloned value is instance of class')
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ok(cloned.view3 instanceof Int8Array, 'cloned value is instance of class')
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isNot(cloned.view1, view1, 'cloned value is not same as input value')
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isNot(cloned.view2, view2, 'cloned value is not same as input value')
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isNot(cloned.view3, view3, 'cloned value is not same as input value')
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deepEqual(Array.from(cloned.view1), [input1, 0], 'cloned value content is correct')
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deepEqual(Array.from(cloned.view2), [input2, input3], 'cloned value content is correct')
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deepEqual(Array.from(cloned.view3), [input1, 0, input2, input3], 'cloned value content is correct')
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})
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test(`${label} - maps`, async ({ same, isNot }) => {
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const map = new Map([['a', 1]])
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same(Array.from(clone(map)), [['a', 1]], 'same value')
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isNot(clone(map), map, 'different object')
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})
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test(`${label} - sets`, async ({ same, isNot }) => {
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const set = new Set([1])
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same(Array.from(clone(set)), [1])
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isNot(clone(set), set, 'different object')
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})
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test(`${label} - nested maps`, async ({ same, isNot }) => {
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const data = { m: new Map([['a', 1]]) }
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same(Array.from(clone(data).m), [['a', 1]], 'same value')
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isNot(clone(data).m, data.m, 'different object')
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})
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test(`${label} - nested sets`, async ({ same, isNot }) => {
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const data = { s: new Set([1]) }
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same(Array.from(clone(data).s), [1], 'same value')
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isNot(clone(data).s, data.s, 'different object')
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})
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}
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