471 lines
14 KiB
TypeScript
471 lines
14 KiB
TypeScript
import {
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reactive,
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readonly,
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toRaw,
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isReactive,
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isReadonly,
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markNonReactive,
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lock,
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unlock,
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effect,
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ref,
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shallowReadonly
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} from '../src'
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import { mockWarn } from '@vue/shared'
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/**
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* @see https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-4.html
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*/
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type Writable<T> = { -readonly [P in keyof T]: T[P] }
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describe('reactivity/readonly', () => {
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mockWarn()
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describe('Object', () => {
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it('should make nested values readonly', () => {
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const original = { foo: 1, bar: { baz: 2 } }
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const observed = readonly(original)
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expect(observed).not.toBe(original)
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expect(isReactive(observed)).toBe(true)
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expect(isReadonly(observed)).toBe(true)
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expect(isReactive(original)).toBe(false)
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expect(isReadonly(original)).toBe(false)
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expect(isReactive(observed.bar)).toBe(true)
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expect(isReadonly(observed.bar)).toBe(true)
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expect(isReactive(original.bar)).toBe(false)
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expect(isReadonly(original.bar)).toBe(false)
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// get
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expect(observed.foo).toBe(1)
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// has
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expect('foo' in observed).toBe(true)
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// ownKeys
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expect(Object.keys(observed)).toEqual(['foo', 'bar'])
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})
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it('should not allow mutation', () => {
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const qux = Symbol('qux')
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const original = {
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foo: 1,
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bar: {
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baz: 2
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},
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[qux]: 3
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}
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const observed: Writable<typeof original> = readonly(original)
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observed.foo = 2
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expect(observed.foo).toBe(1)
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expect(
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`Set operation on key "foo" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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observed.bar.baz = 3
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expect(observed.bar.baz).toBe(2)
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expect(
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`Set operation on key "baz" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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observed[qux] = 4
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expect(observed[qux]).toBe(3)
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expect(
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`Set operation on key "Symbol(qux)" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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delete observed.foo
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expect(observed.foo).toBe(1)
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expect(
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`Delete operation on key "foo" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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delete observed.bar.baz
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expect(observed.bar.baz).toBe(2)
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expect(
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`Delete operation on key "baz" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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delete observed[qux]
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expect(observed[qux]).toBe(3)
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expect(
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`Delete operation on key "Symbol(qux)" failed: target is readonly.`
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).toHaveBeenWarnedLast()
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})
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it('should allow mutation when unlocked', () => {
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const observed: any = readonly({ foo: 1, bar: { baz: 2 } })
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unlock()
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observed.prop = 2
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observed.bar.qux = 3
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delete observed.bar.baz
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delete observed.foo
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lock()
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expect(observed.prop).toBe(2)
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expect(observed.foo).toBeUndefined()
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expect(observed.bar.qux).toBe(3)
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expect('baz' in observed.bar).toBe(false)
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expect(`target is readonly`).not.toHaveBeenWarned()
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})
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it('should not trigger effects when locked', () => {
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const observed: any = readonly({ a: 1 })
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let dummy
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effect(() => {
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dummy = observed.a
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})
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expect(dummy).toBe(1)
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observed.a = 2
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expect(observed.a).toBe(1)
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expect(dummy).toBe(1)
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expect(`target is readonly`).toHaveBeenWarned()
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})
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it('should trigger effects when unlocked', () => {
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const observed: any = readonly({ a: 1 })
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let dummy
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effect(() => {
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dummy = observed.a
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})
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expect(dummy).toBe(1)
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unlock()
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observed.a = 2
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lock()
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expect(observed.a).toBe(2)
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expect(dummy).toBe(2)
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})
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})
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describe('Array', () => {
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it('should make nested values readonly', () => {
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const original = [{ foo: 1 }]
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const observed = readonly(original)
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expect(observed).not.toBe(original)
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expect(isReactive(observed)).toBe(true)
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expect(isReadonly(observed)).toBe(true)
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expect(isReactive(original)).toBe(false)
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expect(isReadonly(original)).toBe(false)
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expect(isReactive(observed[0])).toBe(true)
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expect(isReadonly(observed[0])).toBe(true)
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expect(isReactive(original[0])).toBe(false)
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expect(isReadonly(original[0])).toBe(false)
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// get
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expect(observed[0].foo).toBe(1)
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// has
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expect(0 in observed).toBe(true)
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// ownKeys
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expect(Object.keys(observed)).toEqual(['0'])
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})
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it('should not allow mutation', () => {
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const observed: any = readonly([{ foo: 1 }])
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observed[0] = 1
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expect(observed[0]).not.toBe(1)
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expect(
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`Set operation on key "0" failed: target is readonly.`
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).toHaveBeenWarned()
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observed[0].foo = 2
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expect(observed[0].foo).toBe(1)
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expect(
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`Set operation on key "foo" failed: target is readonly.`
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).toHaveBeenWarned()
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// should block length mutation
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observed.length = 0
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expect(observed.length).toBe(1)
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expect(observed[0].foo).toBe(1)
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expect(
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`Set operation on key "length" failed: target is readonly.`
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).toHaveBeenWarned()
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// mutation methods invoke set/length internally and thus are blocked as well
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observed.push(2)
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expect(observed.length).toBe(1)
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// push triggers two warnings on [1] and .length
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expect(`target is readonly.`).toHaveBeenWarnedTimes(5)
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})
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it('should allow mutation when unlocked', () => {
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const observed: any = readonly([{ foo: 1, bar: { baz: 2 } }])
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unlock()
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observed[1] = 2
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observed.push(3)
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observed[0].foo = 2
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observed[0].bar.baz = 3
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lock()
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expect(observed.length).toBe(3)
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expect(observed[1]).toBe(2)
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expect(observed[2]).toBe(3)
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expect(observed[0].foo).toBe(2)
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expect(observed[0].bar.baz).toBe(3)
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expect(`target is readonly`).not.toHaveBeenWarned()
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})
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it('should not trigger effects when locked', () => {
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const observed: any = readonly([{ a: 1 }])
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let dummy
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effect(() => {
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dummy = observed[0].a
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})
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expect(dummy).toBe(1)
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observed[0].a = 2
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expect(observed[0].a).toBe(1)
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expect(dummy).toBe(1)
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expect(`target is readonly`).toHaveBeenWarnedTimes(1)
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observed[0] = { a: 2 }
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expect(observed[0].a).toBe(1)
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expect(dummy).toBe(1)
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expect(`target is readonly`).toHaveBeenWarnedTimes(2)
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})
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it('should trigger effects when unlocked', () => {
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const observed: any = readonly([{ a: 1 }])
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let dummy
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effect(() => {
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dummy = observed[0].a
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})
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expect(dummy).toBe(1)
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unlock()
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observed[0].a = 2
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expect(observed[0].a).toBe(2)
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expect(dummy).toBe(2)
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observed[0] = { a: 3 }
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expect(observed[0].a).toBe(3)
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expect(dummy).toBe(3)
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observed.unshift({ a: 4 })
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expect(observed[0].a).toBe(4)
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expect(dummy).toBe(4)
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lock()
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})
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})
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const maps = [Map, WeakMap]
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maps.forEach((Collection: any) => {
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describe(Collection.name, () => {
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test('should make nested values readonly', () => {
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const key1 = {}
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const key2 = {}
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const original = new Collection([[key1, {}], [key2, {}]])
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const observed = readonly(original)
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expect(observed).not.toBe(original)
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expect(isReactive(observed)).toBe(true)
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expect(isReadonly(observed)).toBe(true)
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expect(isReactive(original)).toBe(false)
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expect(isReadonly(original)).toBe(false)
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expect(isReactive(observed.get(key1))).toBe(true)
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expect(isReadonly(observed.get(key1))).toBe(true)
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expect(isReactive(original.get(key1))).toBe(false)
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expect(isReadonly(original.get(key1))).toBe(false)
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})
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test('should not allow mutation & not trigger effect', () => {
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const map = readonly(new Collection())
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const key = {}
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let dummy
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effect(() => {
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dummy = map.get(key)
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})
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expect(dummy).toBeUndefined()
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map.set(key, 1)
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expect(dummy).toBeUndefined()
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expect(map.has(key)).toBe(false)
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expect(
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`Set operation on key "${key}" failed: target is readonly.`
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).toHaveBeenWarned()
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})
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test('should allow mutation & trigger effect when unlocked', () => {
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const map = readonly(new Collection())
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const isWeak = Collection === WeakMap
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const key = {}
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let dummy
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effect(() => {
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dummy = map.get(key) + (isWeak ? 0 : map.size)
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})
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expect(dummy).toBeNaN()
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unlock()
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map.set(key, 1)
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lock()
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expect(dummy).toBe(isWeak ? 1 : 2)
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expect(map.get(key)).toBe(1)
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expect(`target is readonly`).not.toHaveBeenWarned()
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})
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if (Collection === Map) {
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test('should retrieve readonly values on iteration', () => {
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const key1 = {}
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const key2 = {}
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const original = new Collection([[key1, {}], [key2, {}]])
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const observed: any = readonly(original)
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for (const [key, value] of observed) {
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expect(isReadonly(key)).toBe(true)
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expect(isReadonly(value)).toBe(true)
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}
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observed.forEach((value: any) => {
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expect(isReadonly(value)).toBe(true)
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})
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for (const value of observed.values()) {
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expect(isReadonly(value)).toBe(true)
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}
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})
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}
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})
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})
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const sets = [Set, WeakSet]
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sets.forEach((Collection: any) => {
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describe(Collection.name, () => {
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test('should make nested values readonly', () => {
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const key1 = {}
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const key2 = {}
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const original = new Collection([key1, key2])
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const observed = readonly(original)
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expect(observed).not.toBe(original)
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expect(isReactive(observed)).toBe(true)
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expect(isReadonly(observed)).toBe(true)
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expect(isReactive(original)).toBe(false)
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expect(isReadonly(original)).toBe(false)
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expect(observed.has(reactive(key1))).toBe(true)
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expect(original.has(reactive(key1))).toBe(false)
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})
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test('should not allow mutation & not trigger effect', () => {
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const set = readonly(new Collection())
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const key = {}
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let dummy
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effect(() => {
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dummy = set.has(key)
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})
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expect(dummy).toBe(false)
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set.add(key)
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expect(dummy).toBe(false)
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expect(set.has(key)).toBe(false)
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expect(
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`Add operation on key "${key}" failed: target is readonly.`
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).toHaveBeenWarned()
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})
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test('should allow mutation & trigger effect when unlocked', () => {
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const set = readonly(new Collection())
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const key = {}
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let dummy
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effect(() => {
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dummy = set.has(key)
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})
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expect(dummy).toBe(false)
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unlock()
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set.add(key)
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lock()
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expect(dummy).toBe(true)
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expect(set.has(key)).toBe(true)
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expect(`target is readonly`).not.toHaveBeenWarned()
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})
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if (Collection === Set) {
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test('should retrieve readonly values on iteration', () => {
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const original = new Collection([{}, {}])
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const observed: any = readonly(original)
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for (const value of observed) {
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expect(isReadonly(value)).toBe(true)
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}
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observed.forEach((value: any) => {
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expect(isReadonly(value)).toBe(true)
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})
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for (const value of observed.values()) {
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expect(isReadonly(value)).toBe(true)
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}
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for (const [v1, v2] of observed.entries()) {
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expect(isReadonly(v1)).toBe(true)
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expect(isReadonly(v2)).toBe(true)
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}
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})
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}
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})
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})
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test('calling reactive on an readonly should return readonly', () => {
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const a = readonly({})
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const b = reactive(a)
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expect(isReadonly(b)).toBe(true)
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// should point to same original
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expect(toRaw(a)).toBe(toRaw(b))
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})
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test('calling readonly on a reactive object should return readonly', () => {
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const a = reactive({})
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const b = readonly(a)
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expect(isReadonly(b)).toBe(true)
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// should point to same original
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expect(toRaw(a)).toBe(toRaw(b))
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})
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test('observing already observed value should return same Proxy', () => {
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const original = { foo: 1 }
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const observed = readonly(original)
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const observed2 = readonly(observed)
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expect(observed2).toBe(observed)
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})
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test('observing the same value multiple times should return same Proxy', () => {
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const original = { foo: 1 }
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const observed = readonly(original)
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const observed2 = readonly(original)
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expect(observed2).toBe(observed)
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})
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test('markNonReactive', () => {
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const obj = readonly({
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foo: { a: 1 },
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bar: markNonReactive({ b: 2 })
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})
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expect(isReactive(obj.foo)).toBe(true)
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expect(isReactive(obj.bar)).toBe(false)
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})
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test('should make ref readonly', () => {
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const n: any = readonly(ref(1))
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n.value = 2
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expect(n.value).toBe(1)
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expect(
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`Set operation on key "value" failed: target is readonly.`
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).toHaveBeenWarned()
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})
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describe('shallowReadonly', () => {
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test('should not make non-reactive properties reactive', () => {
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const props = shallowReadonly({ n: { foo: 1 } })
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expect(isReactive(props.n)).toBe(false)
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})
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test('should make root level properties readonly', () => {
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const props = shallowReadonly({ n: 1 })
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// @ts-ignore
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props.n = 2
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expect(props.n).toBe(1)
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expect(
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`Set operation on key "n" failed: target is readonly.`
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).toHaveBeenWarned()
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})
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// to retain 2.x behavior.
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test('should NOT make nested properties readonly', () => {
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const props = shallowReadonly({ n: { foo: 1 } })
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// @ts-ignore
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props.n.foo = 2
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expect(props.n.foo).toBe(2)
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expect(
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`Set operation on key "foo" failed: target is readonly.`
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).not.toHaveBeenWarned()
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})
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test('should keep reactive properties reactive', () => {
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const props: any = shallowReadonly({ n: reactive({ foo: 1 }) })
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unlock()
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props.n = reactive({ foo: 2 })
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lock()
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expect(isReactive(props.n)).toBe(true)
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})
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})
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})
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