import Vue from 'vue'
describe('Component async', () => {
const oldSetTimeout = setTimeout
const oldClearTimeout = clearTimeout
let timeoutsPending = {}
beforeAll(function () {
global.setTimeout = function (func, delay) {
if (delay >= 1000) {
return
}
const id = oldSetTimeout(function () {
delete timeoutsPending[id]
func()
}, delay) as any
timeoutsPending[id] = delay
return id
}
global.clearTimeout = function (id) {
oldClearTimeout(id)
delete timeoutsPending[id]
}
})
afterAll(function () {
global.setTimeout = oldSetTimeout
global.clearTimeout = oldClearTimeout
})
beforeEach(() => {
timeoutsPending = {}
})
afterEach(() => {
expect(JSON.stringify(timeoutsPending)).toEqual(JSON.stringify({}))
})
it('normal', done => {
const vm = new Vue({
template: '<div><test></test></div>',
components: {
test: resolve => {
setTimeout(() => {
resolve({
template: '<div>hi</div>'
})
Vue.nextTick(next)
}, 0)
}
}
}).$mount()
expect(vm.$el.innerHTML).toBe('<!---->')
expect(vm.$children.length).toBe(0)
function next() {
expect(vm.$el.innerHTML).toBe('<div>hi</div>')
expect(vm.$children.length).toBe(1)
done()
}
})
it('resolve ES module default', done => {
const vm = new Vue({
template: '<div><test></test></div>',
components: {
test: resolve => {
setTimeout(() => {
resolve({
__esModule: true,
default: {
template: '<div>hi</div>'
}
})
Vue.nextTick(next)
}, 0)
}
}
}).$mount()
expect(vm.$el.innerHTML).toBe('<!---->')
expect(vm.$children.length).toBe(0)
function next() {
expect(vm.$el.innerHTML).toBe('<div>hi</div>')
expect(vm.$children.length).toBe(1)
done()
}
})
it('as root', done => {
const vm = new Vue({
template: '<test></test>',
components: {
test: resolve => {
setTimeout(() => {
resolve({
template: '<div>hi</div>'
})
Vue.nextTick(next)
}, 0)
}
}
}).$mount()
expect(vm.$el.nodeType).toBe(8)
expect(vm.$children.length).toBe(0)
function next() {
expect(vm.$el.nodeType).toBe(1)
expect(vm.$el.outerHTML).toBe('<div>hi</div>')
expect(vm.$children.length).toBe(1)
done()
}
})
it('dynamic', done => {
const vm = new Vue({
template: '<component :is="view"></component>',
data: {
view: 'view-a'
},
components: {
'view-a': resolve => {
setTimeout(() => {
resolve({
template: '<div>A</div>'
})
Vue.nextTick(step1)
}, 0)
},
'view-b': resolve => {
setTimeout(() => {
resolve({
template: '<p>B</p>'
})
Vue.nextTick(step2)
}, 0)
}
}
}).$mount()
let aCalled = false
function step1() {
expect(aCalled).toBe(false)
aCalled = true
expect(vm.$el.tagName).toBe('DIV')
expect(vm.$el.textContent).toBe('A')
vm.view = 'view-b'
}
function step2() {
expect(vm.$el.tagName).toBe('P')
expect(vm.$el.textContent).toBe('B')
vm.view = 'view-a'
waitForUpdate(() => {
expect(vm.$el.tagName).toBe('DIV')
expect(vm.$el.textContent).toBe('A')
}).then(done)
}
})
it('warn reject', () => {
new Vue({
template: '<test></test>',
components: {
test: (resolve, reject) => {
reject('nooooo')
}
}
}).$mount()
expect('Reason: nooooo').toHaveBeenWarned()
})
it('with v-for', done => {
const vm = new Vue({
template: '<div><test v-for="n in list" :key="n" :n="n"></test></div>',
data: {
list: [1, 2, 3]
},
components: {
test: resolve => {
setTimeout(() => {
resolve({
props: ['n'],
template: '<div>{{n}}</div>'
})
Vue.nextTick(next)
}, 0)
}
}
}).$mount()
function next() {
expect(vm.$el.innerHTML).toBe('<div>1</div><div>2</div><div>3</div>')
done()
}
})
it('returning Promise', done => {
const vm = new Vue({
template: '<div><test></test></div>',
components: {
test: () => {
return new Promise(resolve => {
setTimeout(() => {
resolve({
template: '<div>hi</div>'
})
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 0)
})
}
}
}).$mount()
expect(vm.$el.innerHTML).toBe('<!---->')
expect(vm.$children.length).toBe(0)
function next() {
expect(vm.$el.innerHTML).toBe('<div>hi</div>')
expect(vm.$children.length).toBe(1)
done()
}
})
describe('loading/error/timeout', () => {
it('with loading component', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise(resolve => {
setTimeout(() => {
resolve({ template: '<div>hi</div>' })
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 50)
}),
loading: { template: `<div>loading</div>` },
delay: 1
})
}
}).$mount()
expect(vm.$el.innerHTML).toBe('<!---->')
let loadingAsserted = false
setTimeout(() => {
Vue.nextTick(() => {
loadingAsserted = true
expect(vm.$el.textContent).toBe('loading')
})
}, 1)
function next() {
expect(loadingAsserted).toBe(true)
expect(vm.$el.textContent).toBe('hi')
done()
}
})
it('with loading component (0 delay)', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise(resolve => {
setTimeout(() => {
resolve({ template: '<div>hi</div>' })
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 50)
}),
loading: { template: `<div>loading</div>` },
delay: 0
})
}
}).$mount()
expect(vm.$el.textContent).toBe('loading')
function next() {
expect(vm.$el.textContent).toBe('hi')
done()
}
})
it('with error component', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise((resolve, reject) => {
setTimeout(() => {
reject()
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 50)
}),
loading: { template: `<div>loading</div>` },
error: { template: `<div>error</div>` },
delay: 0
})
}
}).$mount()
expect(vm.$el.textContent).toBe('loading')
function next() {
expect(`Failed to resolve async component`).toHaveBeenWarned()
expect(vm.$el.textContent).toBe('error')
done()
}
})
it('with error component + timeout', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise((resolve, reject) => {
setTimeout(() => {
resolve({ template: '<div>hi</div>' })
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 50)
}),
loading: { template: `<div>loading</div>` },
error: { template: `<div>error</div>` },
delay: 0,
timeout: 1
})
}
}).$mount()
expect(vm.$el.textContent).toBe('loading')
setTimeout(() => {
Vue.nextTick(() => {
expect(`Failed to resolve async component`).toHaveBeenWarned()
expect(vm.$el.textContent).toBe('error')
})
}, 1)
function next() {
expect(vm.$el.textContent).toBe('error')
done()
}
})
it('should not trigger timeout if resolved', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise((resolve, reject) => {
setTimeout(() => {
resolve({ template: '<div>hi</div>' })
}, 10)
}),
error: { template: `<div>error</div>` },
timeout: 20
})
}
}).$mount()
setTimeout(() => {
expect(vm.$el.textContent).toBe('hi')
expect(`Failed to resolve async component`).not.toHaveBeenWarned()
done()
}, 50)
})
it('should not have running timeout/loading if resolved', done => {
const vm = new Vue({
template: `<div><test/></div>`,
components: {
test: () => ({
component: new Promise((resolve, reject) => {
setTimeout(() => {
resolve({ template: '<div>hi</div>' })
Promise.resolve().then(() => {
Vue.nextTick(next)
})
}, 10)
}),
loading: { template: `<div>loading</div>` },
delay: 30,
error: { template: `<div>error</div>` },
timeout: 40
})
}
}).$mount()
function next() {
expect(vm.$el.textContent).toBe('hi')
done()
}
})
it(`should work when resolving sync in sibling component's mounted hook`, done => {
let resolveTwo
const vm = new Vue({
template: `<div><one/> <two/></div>`,
components: {
one: {
template: `<div>one</div>`,
mounted() {
resolveTwo()
}
},
two: resolve => {
resolveTwo = () => {
resolve({
template: `<div>two</div>`
})
}
}
}
}).$mount()
expect(vm.$el.textContent).toBe('one ')
waitForUpdate(() => {
expect(vm.$el.textContent).toBe('one two')
}).then(done)
})
})
})