如何从Vuetify创建一个v-alert的单元测试？

npm install vuetify @vue/test-utils --save-dev

import { mount, createLocalVue } from '@vue/test-utils';
import Vuetify from 'vuetify';
import Alert from '@/components/Alert.vue'; // 假设Alert组件位于components目录下

const localVue = createLocalVue();
localVue.use(Vuetify);

describe('Alert.vue', () => {
  let vuetify;

  beforeEach(() => {
    vuetify = new Vuetify();
  });

  it('renders the alert with correct message', () => {
    const wrapper = mount(Alert, {
      localVue,
      vuetify,
      propsData: {
        message: 'This is an alert message',
      },
    });

    expect(wrapper.text()).toContain('This is an alert message');
  });

  it('emits a close event when close button is clicked', () => {
    const wrapper = mount(Alert, {
      localVue,
      vuetify,
      propsData: {
        message: 'This is an alert message',
      },
    });

    wrapper.find('.v-alert__dismissible .v-btn').trigger('click');

    expect(wrapper.emitted().close).toBeTruthy();
  });
});

npm run test:unit