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render-proxy.spec.js
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render-proxy.spec.js
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import Vue from 'vue'
if (typeof Proxy !== 'undefined') {
describe('render proxy', () => {
it('should warn missing property in render fns with `with`', () => {
new Vue({
template: `<div>{{ a }}</div>`
}).$mount()
expect(`Property or method "a" is not defined`).toHaveBeenWarned()
})
it('should warn missing property in render fns without `with`', () => {
const render = function (h) {
return h('div', [this.a])
}
render._withStripped = true
new Vue({
render
}).$mount()
expect(`Property or method "a" is not defined`).toHaveBeenWarned()
})
it('should not warn for hand-written render functions', () => {
new Vue({
render (h) {
return h('div', [this.a])
}
}).$mount()
expect(`Property or method "a" is not defined`).not.toHaveBeenWarned()
})
it('support symbols using the `in` operator in hand-written render functions', () => {
const sym = Symbol()
const vm = new Vue({
created () {
this[sym] = 'foo'
},
render (h) {
if (sym in this) {
return h('div', [this[sym]])
}
}
}).$mount()
expect(vm.$el.textContent).toBe('foo')
})
})
}