55566e8f52
BREAKING CHANGE: this.$emit() and setupContext.emit() no longer
return values. For logic that relies on return value of listeners,
the listener should be declared as an `onXXX` prop and be called
directly. This still allows the parent component to pass in
a handler using `v-on`, since `v-on:foo` internally compiles
to `onFoo`.
ref: https://github.com/vuejs/rfcs/pull/16
48 lines
1.0 KiB
TypeScript
48 lines
1.0 KiB
TypeScript
import { ref, render, h, nodeOps, nextTick } from '@vue/runtime-test'
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describe('component: slots', () => {
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// TODO more tests for slots normalization etc.
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test('should respect $stable flag', async () => {
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const flag1 = ref(1)
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const flag2 = ref(2)
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const spy = jest.fn()
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const Child = () => {
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spy()
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return 'child'
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}
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const App = {
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setup() {
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return () => [
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flag1.value,
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h(
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Child,
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{ n: flag2.value },
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{
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foo: () => 'foo',
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$stable: 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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render(h(App), nodeOps.createElement('div'))
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expect(spy).toHaveBeenCalledTimes(1)
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// parent re-render, props didn't change, slots are stable
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// -> child should not update
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flag1.value++
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await nextTick()
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expect(spy).toHaveBeenCalledTimes(1)
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// parent re-render, props changed
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// -> child should update
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flag2.value++
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await nextTick()
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expect(spy).toHaveBeenCalledTimes(2)
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})
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})
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