254 lines
6.5 KiB
TypeScript
254 lines
6.5 KiB
TypeScript
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import test from 'ava'
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import { copy } from '../src/index'
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test('copy - change original', t => {
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const original = { a: 0, b: 0, c: { d: 0 } }
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const copied = copy(original)
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t.deepEqual(copied, original)
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// change original
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original.a = 1
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t.is(original.a, 1)
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t.is(copied.a, 0)
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original.c.d = 1
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t.is(original.c.d, 1)
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t.is(copied.c.d, 0)
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// @ts-ignore
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original.c.e = 'new'
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// @ts-ignore
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t.is(original.c.e, 'new')
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// @ts-ignore
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t.is(copied.c.e, undefined)
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})
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test('copy - change copied', t => {
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const original = { a: false, b: '', c: { d: false } }
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const copied = copy(original)
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// change copied
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copied.a = true
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t.is(copied.a, true)
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t.is(original.a, false)
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copied.c.d = true
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t.is(copied.c.d, true)
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t.is(original.c.d, false)
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// @ts-ignore
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copied.c.e = 'new'
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// @ts-ignore
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t.is(copied.c.e, 'new')
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// @ts-ignore
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t.is(original.c.e, undefined)
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})
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test('Arrays in objects - change original', t => {
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const original = { a: [1, 2], c: { d: ['a'] } }
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const copied = copy(original)
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t.deepEqual(copied, original)
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// change original
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original.a.push(3)
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t.deepEqual(original.a, [1, 2, 3])
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t.deepEqual(copied.a, [1, 2])
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original.c.d.splice(0, 0, 'z')
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t.deepEqual(original.c.d, ['z', 'a'])
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t.deepEqual(copied.c.d, ['a'])
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})
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test('Arrays in objects - change copied', t => {
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const original = { a: [1, 2], c: { d: ['a'] } }
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const copied = copy(original)
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t.deepEqual(copied, original)
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// change copied
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copied.a.push(3)
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t.deepEqual(copied.a, [1, 2, 3])
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t.deepEqual(original.a, [1, 2])
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copied.c.d.splice(0, 0, 'z')
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t.deepEqual(copied.c.d, ['z', 'a'])
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t.deepEqual(original.c.d, ['a'])
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})
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test('Arrays with objects in objects - change original', t => {
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const original = { a: [{ a: 1 }], c: { d: [{ b: 1 }] } }
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const copied = copy(original)
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t.deepEqual(copied, original)
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// change original
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original.a[0].a = 2
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t.deepEqual(original.a, [{ a: 2 }])
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t.deepEqual(copied.a, [{ a: 1 }])
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original.c.d[0].b = 2
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t.deepEqual(original.c.d, [{ b: 2 }])
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t.deepEqual(copied.c.d, [{ b: 1 }])
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})
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test('Arrays with objects in objects - change copied', t => {
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const original = { a: [{ a: 1 }], c: { d: [{ b: 1 }] } }
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const copied = copy(original)
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t.deepEqual(copied, original)
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// change copied
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copied.a[0].a = 2
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t.deepEqual(copied.a, [{ a: 2 }])
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t.deepEqual(original.a, [{ a: 1 }])
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copied.c.d[0].b = 2
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t.deepEqual(copied.c.d, [{ b: 2 }])
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t.deepEqual(original.c.d, [{ b: 1 }])
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})
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test('Arrays', t => {
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const original = [1, 2, 3, 4]
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const copied = copy(original)
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t.deepEqual(copied, original)
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copied.splice(0, 0, 0)
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t.deepEqual(original, [1, 2, 3, 4])
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t.deepEqual(copied, [0, 1, 2, 3, 4])
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})
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test('non objects 1', t => {
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const original = 'ha'
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const copied = copy(original)
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t.is(copied, original)
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})
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test('non objects 2', t => {
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const original = 1
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const copied = copy(original)
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t.is(copied, original)
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})
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test('non objects 3', t => {
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const original = undefined
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const copied = copy(original)
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t.is(copied, original)
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})
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test('special objects 1', t => {
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const original = new Date()
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const copied = copy(original)
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t.deepEqual(copied, original)
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})
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test('special objects 2', t => {
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const original = {}
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const copied = copy(original)
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t.deepEqual(copied, original)
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})
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test('symbols as keys', t => {
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const mySymbol = Symbol('mySymbol')
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const original = { value: 42, [mySymbol]: 'hello' }
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const copied = copy(original)
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// change original
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original.value = 1
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// @ts-ignore
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original[mySymbol] = 2
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t.is(copied.value, 42)
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t.is(copied[mySymbol], 'hello')
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t.is(original.value, 1)
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// @ts-ignore
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t.is(original[mySymbol], 2)
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})
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test('nonenumerable keys - turned on', t => {
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const mySymbol = Symbol('mySymbol')
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const original = { value: 42 }
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Object.defineProperty(original, 'id', {
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value: 1,
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writable: true,
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enumerable: false,
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configurable: true,
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})
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Object.defineProperty(original, mySymbol, {
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value: 'original',
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writable: true,
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enumerable: false,
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configurable: true,
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})
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const copied = copy(original, { nonenumerable: true })
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// change original
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// @ts-ignore
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original.id = 100
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original[mySymbol] = 'new'
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original.value = 300
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t.is(copied.value, 42)
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// @ts-ignore
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t.is(copied.id, 1)
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t.is(copied[mySymbol], 'original')
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t.is(Object.keys(copied).length, 1)
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t.true(Object.keys(copied).includes('value'))
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// @ts-ignore
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t.is(original.id, 100)
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t.is(original[mySymbol], 'new')
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t.is(original.value, 300)
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t.is(Object.keys(original).length, 1)
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})
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test('nonenumerable keys - turned off', t => {
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const mySymbol = Symbol('mySymbol')
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const original = { value: 42 }
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Object.defineProperty(original, 'id', {
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value: 1,
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writable: true,
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enumerable: false,
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configurable: true,
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})
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Object.defineProperty(original, mySymbol, {
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value: 'original',
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writable: true,
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enumerable: false,
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configurable: true,
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})
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const copied = copy(original)
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// change original
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t.is(copied.value, 42)
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// @ts-ignore
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t.is(copied.id, undefined)
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t.is(copied[mySymbol], undefined)
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})
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test('specific props', t => {
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const mySymbol = Symbol('mySymbol')
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const mySymbol2 = Symbol('mySymbol')
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const original = { value: 42, value2: 24 }
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Object.defineProperty(original, 'id', {
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value: 1,
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writable: true,
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enumerable: false,
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configurable: true,
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})
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Object.defineProperty(original, mySymbol, {
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value: 'original',
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writable: true,
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enumerable: false,
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configurable: true,
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})
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Object.defineProperty(original, 'id2', {
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value: 2,
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writable: true,
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enumerable: false,
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configurable: true,
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})
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Object.defineProperty(original, mySymbol2, {
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value: 'original2',
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writable: true,
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enumerable: false,
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configurable: true,
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})
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// only enumerable
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const copied = copy(original, { props: [mySymbol, 'value', 'id'] })
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t.is(copied.value, 42)
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// @ts-ignore
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t.is(copied.id, undefined)
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t.is(copied[mySymbol], undefined)
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t.is(copied.value2, undefined)
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// @ts-ignore
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t.is(copied.id2, undefined)
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t.is(copied[mySymbol2], undefined)
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t.is(Object.keys(copied).length, 1)
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t.true(Object.keys(copied).includes('value'))
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t.is(Object.keys(original).length, 2)
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// non-enumerable included
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const copied2 = copy(original, { props: [mySymbol, 'value', 'id'], nonenumerable: true })
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t.is(copied2.value, 42)
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// @ts-ignore
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t.is(copied2.id, 1)
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t.is(copied2[mySymbol], 'original')
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t.is(copied2.value2, undefined)
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// @ts-ignore
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t.is(copied2.id2, undefined)
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t.is(copied2[mySymbol2], undefined)
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t.is(Object.keys(copied2).length, 1)
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t.true(Object.keys(copied2).includes('value'))
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t.is(Object.keys(original).length, 2)
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})
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