Vue JS Jest : mount() doesn't render properly - vue.js

Question

MyView.vue :
<template>
<v-container fluid>
<v-row>
<v-col v-for="obj in myObjs" :key="obj.ref">
<MyChild :obj="obj" />
</v-col>
</v-row>
</v-container>
</template>
export default class MyView extends Vue {
myObjs: MyObj[] = []
mounted () {
this.myObjs = await api.getGreatObjs()
// this.myObjs is like expected
}
}
MyView.spec.ts :
beforeEach( () => {
localVue = createLocalVue()
localVue.use(Vuetify)
jest.mock('axios')
jest.spyOn(api, 'getGreatObjs')
.mockImplementation( () => new Promise((resolve, reject) => {
resolve([new MyObj({name: 'toto', value: 45}), ...])
}))
})
it('should render', () => {
wrapper = mount(MyView, {
stubs: ['router-link']
})
expect(wrapper.findAll(MyChild).length).toBe(2)
})
Content of wrapper.html():
<v-container fluid=\"\"><v-container fluid=\"\"><v-row></v-row></v-container></v-container>
I also tried this (MyView.spec.ts):
describe('P1RealTime.vue', () => {
let wrapper: any
let localVue: any
beforeEach( () => {
localVue = createLocalVue()
localVue.use(Vuetify)
})
it('should render', () => {
wrapper = mount(MyView, {
localVue: localVue,
stubs: ['router-link']
})
expect(wrapper.html()).toEqual('')
})
})
Console result :
Expected: ""
Received: "<div class=\"container container--fluid\"><div class=\"container container--fluid\"><div></div></div>"
There is nothing inside "row" (<v-row></v-row>) or "div" (<div></div>) but there should be multiple MyChild ; so, I don't understand.
Could you help me ?