我正在嘗試使用嵌套組件對(duì)簡(jiǎn)單組件進(jìn)行單元測(cè)試。頁(yè)面在瀏覽器中正確呈現(xiàn)，但我似乎無(wú)法編寫(xiě)有效的Jest測(cè)試。v-data-table問(wèn)題似乎出在我用于插槽的模板上 - 我直接從文檔中提取了它。當(dāng)我用屬性注釋掉模板時(shí)，測(cè)試執(zhí)行正常。v-slotPeople.vue：<template>  <v-data-table    :headers="headers"    :items="people"    disable-pagination    disable-sort    disable-filtering    hide-default-footer    :loading="!people"  >    <template v-slot:item.id="{ item }">      <v-icon>        mdi-link-variant      </v-icon>      <router-link        :to="{ name: 'assignments', query: { assignee_id: item.id } }"        >Link</router-link      >    </template>  </v-data-table></template><script>export default {  name: "People",  data: () => ({    headers: [      {        text: "Name",        value: "first_name"      },      {        text: "Assignment link",        value: "id"      }    ]  }),  props: {    people: {      type: Array,      required: true    }  }};</script>People.spec.js：import { shallowMount } from "@vue/test-utils";import People from "@/components/People.vue";function getMountedComponent(Component, propsData) {  return shallowMount(Component, { propsData });}const propsData = {  people: [{ id: 1 }]};describe("headers", () => {  it("contains name and assignment", () => {    expect(getMountedComponent(People, propsData).vm.headers).toEqual([      {        text: "Name",        value: "first_name"      },      {        text: "Assignment link",        value: "id"      }    ]);  });});錯(cuò)誤信息：  console.error node_modules/vue/dist/vue.runtime.common.dev.js:621    [Vue warn]: Error in render: "TypeError: Cannot read property 'item' of undefined"    found in    ---> <VDataTable>           <People>             <Root>  console.error node_modules/vue/dist/vue.runtime.common.dev.js:1884    TypeError: Cannot read property 'item' of undefined