55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import { h, Component, memoize, nextTick } from '../src'
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import { renderInstance, serialize } from '@vue/runtime-test'
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describe('memoize', () => {
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it('should work', async () => {
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class App extends Component {
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count = 1
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render() {
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return h('div', [
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this.count,
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this.count % 2
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? memoize(() => h('div', `A` + this.count), this, 0)
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: null,
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memoize(() => h('div', `B` + this.count), this, 1)
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])
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}
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}
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const app = await renderInstance(App)
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expect(serialize(app.$el)).toBe(`<div>1<div>A1</div><div>B1</div></div>`)
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app.count++
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await nextTick()
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expect(serialize(app.$el)).toBe(`<div>2<div>B1</div></div>`)
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app.count++
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await nextTick()
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// test remounting a memoized tree
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expect(serialize(app.$el)).toBe(`<div>3<div>A1</div><div>B1</div></div>`)
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})
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it('should invalidate based on keys', async () => {
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class App extends Component {
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foo = 1
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bar = 1
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render() {
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return memoize(() => h('div', this.foo + this.bar), this, 0, [this.bar])
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}
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}
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const app = await renderInstance(App)
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expect(serialize(app.$el)).toBe(`<div>2</div>`)
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app.foo++
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await nextTick()
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// should not update
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expect(serialize(app.$el)).toBe(`<div>2</div>`)
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app.bar++
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await nextTick()
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// should update now
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expect(serialize(app.$el)).toBe(`<div>4</div>`)
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})
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})
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