import { reactive, isReactive, effect, toRaw } from '../../src' describe('reactivity/collections', () => { describe('WeakSet', () => { it('instanceof', () => { const original = new WeakSet() const observed = reactive(original) expect(isReactive(observed)).toBe(true) expect(original instanceof WeakSet).toBe(true) expect(observed instanceof WeakSet).toBe(true) }) it('should observe mutations', () => { let dummy const value = {} const set = reactive(new WeakSet()) effect(() => (dummy = set.has(value))) expect(dummy).toBe(false) set.add(value) expect(dummy).toBe(true) set.delete(value) expect(dummy).toBe(false) }) it('should observe mutations with observed value', () => { let dummy const value = reactive({}) const set = reactive(new WeakSet()) effect(() => (dummy = set.has(value))) expect(dummy).toBe(false) set.add(value) expect(dummy).toBe(true) set.delete(value) expect(dummy).toBe(false) }) it('should not observe custom property mutations', () => { let dummy const set: any = reactive(new WeakSet()) effect(() => (dummy = set.customProp)) expect(dummy).toBe(undefined) set.customProp = 'Hello World' expect(dummy).toBe(undefined) }) it('should not observe non value changing mutations', () => { let dummy const value = {} const set = reactive(new WeakSet()) const setSpy = jest.fn(() => (dummy = set.has(value))) effect(setSpy) expect(dummy).toBe(false) expect(setSpy).toHaveBeenCalledTimes(1) set.add(value) expect(dummy).toBe(true) expect(setSpy).toHaveBeenCalledTimes(2) set.add(value) expect(dummy).toBe(true) expect(setSpy).toHaveBeenCalledTimes(2) set.delete(value) expect(dummy).toBe(false) expect(setSpy).toHaveBeenCalledTimes(3) set.delete(value) expect(dummy).toBe(false) expect(setSpy).toHaveBeenCalledTimes(3) }) it('should not observe raw data', () => { const value = {} let dummy const set = reactive(new WeakSet()) effect(() => (dummy = toRaw(set).has(value))) expect(dummy).toBe(false) set.add(value) expect(dummy).toBe(false) }) it('should not be triggered by raw mutations', () => { const value = {} let dummy const set = reactive(new WeakSet()) effect(() => (dummy = set.has(value))) expect(dummy).toBe(false) toRaw(set).add(value) expect(dummy).toBe(false) }) it('should not pollute original Set with Proxies', () => { const set = new WeakSet() const observed = reactive(set) const value = reactive({}) observed.add(value) expect(observed.has(value)).toBe(true) expect(set.has(value)).toBe(false) }) }) })