Unit testing Mocha Chai vue测试vue组件：此.$notify不是功能

我正在使用这个组件：

从那以后，我所有的摩卡柴测试单元都失败了

this.$notify is not a function

这是我的登录规范：

// Importing The testing library 
import { expect } from "chai";
import { mount } from '@vue/test-utils'

// Importing  The component I need to test
import Login from "@/components/Login.vue";


// Mounting the component as in real life 
const wrapper = mount(Login);


describe("Login test", () => {

  it("getAuth() to be a function", () => {
    expect(wrapper.vm.getAuth).to.be.a("function");
  });

});

我试过mount、shallowMount和render，但运气不好

有解决办法吗

我在main.js中调用vue通知，如下所示：

import Notifications from "vue-notification";
Vue.use(Notifications);

谢谢大家!

编辑： 我试图补充

const $notify = require('vue-notification')

到我的Login.vue组件没有运气

编辑2:尝试像这样调用函数，但运气不佳：

 this.$root.$notify({
        group: 'foo',
        title: 'Hello ',
        text: 'Cool'
        });

[Vue warn]: Error in mounted hook: "TypeError: this.$root.$notify is not a function"

---

*编辑：****由我决定********* 我把vue导入得很糟糕。请查看我的工作login.spec.js测试文件：

// THE ASSERTION LIBRARY
import { expect } from "chai";

// THE TESTING LIBRARY
import { mount } from "@vue/test-utils";

// THE COMPONENT THAT I WANT TO TEST
import Login from "@/components/Login.vue";

// THE EXTERNAL COMPONENTS LINKED TO MY LOGIN COMPONENT  THAT I NEED TO JOIN
import Vue from 'vue';
import Vuelidate from 'vuelidate'
Vue.use(Vuelidate)
 import {
    required,
    minLength,
    between
} from "vuelidate/lib/validators";
import Notifications from "vue-notification";
import velocity      from 'velocity-animate'
Vue.use(Notifications, { velocity });


// THE WRAPPER CONTAIN MY LOGIN MOUNTED COMPONENT, JUST LIKE IN THE REAL LIFE
const wrapper = mount(Login)

describe("Login test", () => {

  it("getAuth() to be a function", () => {
    expect(wrapper.vm.getAuth).to.be.a("function");
  });

});