78 lines
2.1 KiB
TypeScript
78 lines
2.1 KiB
TypeScript
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import { observable, autorun, unwrap, isObservable } from '../../src'
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describe('observer/collections/WeakMap', () => {
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test('instanceof', () => {
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const original = new WeakMap()
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const observed = observable(original)
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expect(isObservable(observed)).toBe(true)
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expect(original instanceof WeakMap).toBe(true)
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expect(observed instanceof WeakMap).toBe(true)
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})
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it('should observe mutations', () => {
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let dummy
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const key = {}
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const map = observable(new WeakMap())
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autorun(() => {
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dummy = map.get(key)
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})
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expect(dummy).toBe(undefined)
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map.set(key, 'value')
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expect(dummy).toBe('value')
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map.set(key, 'value2')
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expect(dummy).toBe('value2')
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map.delete(key)
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expect(dummy).toBe(undefined)
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})
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it('should not observe custom property mutations', () => {
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let dummy
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const map: any = observable(new Map())
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autorun(() => (dummy = map.customProp))
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expect(dummy).toBe(undefined)
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map.customProp = 'Hello World'
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expect(dummy).toBe(undefined)
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})
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it('should not observe non value changing mutations', () => {
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let dummy
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const key = {}
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const map = observable(new Map())
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const mapSpy = jest.fn(() => (dummy = map.get(key)))
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autorun(mapSpy)
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expect(dummy).toBe(undefined)
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expect(mapSpy).toHaveBeenCalledTimes(1)
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map.set(key, 'value')
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expect(dummy).toBe('value')
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expect(mapSpy).toHaveBeenCalledTimes(2)
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map.set(key, 'value')
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expect(dummy).toBe('value')
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expect(mapSpy).toHaveBeenCalledTimes(2)
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map.delete(key)
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expect(dummy).toBe(undefined)
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expect(mapSpy).toHaveBeenCalledTimes(3)
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map.delete(key)
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expect(dummy).toBe(undefined)
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expect(mapSpy).toHaveBeenCalledTimes(3)
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map.clear()
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expect(dummy).toBe(undefined)
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expect(mapSpy).toHaveBeenCalledTimes(3)
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})
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it('should not observe raw data', () => {
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let dummy
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const key = {}
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const map = observable(new Map())
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autorun(() => (dummy = unwrap(map).get('key')))
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expect(dummy).toBe(undefined)
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map.set(key, 'Hello')
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expect(dummy).toBe(undefined)
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map.delete(key)
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expect(dummy).toBe(undefined)
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})
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})
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