Error with @vue/cli-plugin-unit-mocha, doesn't recognize M from Materialize-css

Error.txt

$ npm run test:unit

> APP@2019.1.1 test:unit Disco:\caminho\da\aplicação
> vue-cli-service test:unit -c -w

 WEBPACK  Compiling...

 DONE  Compiled successfully in 7910ms

 WEBPACK  Compiled successfully in 7910ms

 MOCHA  Testing...

 RUNTIME EXCEPTION  Exception occurred while loading your tests

ReferenceError: M is not defined
    at Disco:\caminho\da\aplicação\dist\webpack:\node_modules\materialize-css\dist\js\materialize.js:1070:1
    at Object.<anonymous> (Disco:\caminho\da\aplicação\dist\webpack:\node_modules\materialize-css\dist\js\materialize.js:1071:1)
    at Object../node_modules/materialize-css/dist/js/materialize.js (Disco:\caminho\da\aplicação\dist\main.js:150230:30)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module../src/store/store.js (Disco:\caminho\da\aplicação\dist\webpack:\src\store\store.js:1:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module../src/router/index.js (Disco:\caminho\da\aplicação\dist\webpack:\src\router\index.js:1:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module.<anonymous> (Disco:\caminho\da\aplicação\dist\main.js:42484:106)
    at Module../node_modules/cache-loader/dist/cjs.js?!./node_modules/babel-loader/lib/index.js!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/components/login.vue?vue&type=script&lang=js& (Disco:\caminho\da\aplicação\dist\main.js:42586:30)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module../src/components/login.vue?vue&type=script&lang=js& (Disco:\caminho\da\aplicação\dist\webpack:\src\components\login.vue?7c3c:1:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module../src/components/login.vue (Disco:\caminho\da\aplicação\dist\webpack:\src\components\login.vue:1:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Module../tests/unit/Login/login.spec.js (Disco:\caminho\da\aplicação\dist\webpack:\tests\unit\Login\login.spec.js:1:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at run (Disco:\caminho\da\aplicação\dist\webpack:\node_modules\mocha-webpack\lib\entry.js:3:1)
    at Array.forEach (<anonymous>)
    at Object../node_modules/mocha-webpack/lib/entry.js (Disco:\caminho\da\aplicação\dist\webpack:\node_modules\mocha-webpack\lib\entry.js:10:1)
    at __webpack_require__ (Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:19:1)
    at Disco:\caminho\da\aplicação\dist\webpack:\webpack\bootstrap:83:1
    at Object.<anonymous> (Disco:\caminho\da\aplicação\dist\main.js:87:10)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object._module2.default._extensions.(anonymous function) [as .js] (Disco:\caminho\da\aplicação\node_modules\mocha-webpack\lib\util\registerRequireHook.js:148:12)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
    at Disco:\caminho\da\aplicação\node_modules\mocha\lib\mocha.js:250:27
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (Disco:\caminho\da\aplicação\node_modules\mocha\lib\mocha.js:247:14)
    at Mocha.run (Disco:\caminho\da\aplicação\node_modules\mocha\lib\mocha.js:576:10)
    at runMocha (Disco:\caminho\da\aplicação\node_modules\mocha-webpack\lib\runner\TestRunner.js:244:35)
    at Disco:\caminho\da\aplicação\node_modules\mocha-webpack\lib\runner\TestRunner.js:300:13
    at Disco:\caminho\da\aplicação\node_modules\mocha-webpack\lib\webpack\compiler\registerReadyCallback.js:26:7
    at AsyncSeriesHook.eval [as callAsync] (eval at create (Disco:\caminho\da\aplicação\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:36:1)
    at AsyncSeriesHook.lazyCompileHook (Disco:\caminho\da\aplicação\node_modules\tapable\lib\Hook.js:154:20)
    at Watching._done (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Watching.js:97:28)
    at compiler.emitRecords.err (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Watching.js:72:19)
    at Compiler.emitRecords (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Compiler.js:371:39)
    at compiler.emitAssets.err (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Watching.js:53:20)
    at hooks.afterEmit.callAsync.err (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Compiler.js:357:14)
    at _err0 (eval at create (Disco:\caminho\da\aplicação\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:11:1)
    at callback (Disco:\caminho\da\aplicação\node_modules\copy-webpack-plugin\dist\index.js:126:17)
    at afterEmit (Disco:\caminho\da\aplicação\node_modules\copy-webpack-plugin\dist\index.js:220:13)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (Disco:\caminho\da\aplicação\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:7:1)
    at AsyncSeriesHook.lazyCompileHook (Disco:\caminho\da\aplicação\node_modules\tapable\lib\Hook.js:154:20)
    at asyncLib.forEach.err (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Compiler.js:354:27)
    at Disco:\caminho\da\aplicação\node_modules\neo-async\async.js:2825:7
    at done (Disco:\caminho\da\aplicação\node_modules\neo-async\async.js:2861:11)
    at Disco:\caminho\da\aplicação\node_modules\neo-async\async.js:2813:7
    at MemoryFileSystem.writeFile (Disco:\caminho\da\aplicação\node_modules\memory-fs\lib\MemoryFileSystem.js:328:9)
    at writeOut (Disco:\caminho\da\aplicação\node_modules\webpack\lib\Compiler.js:338:29)
    at Immediate._onImmediate (Disco:\caminho\da\aplicação\node_modules\memory-fs\lib\MemoryFileSystem.js:288:4)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)

login.spec.js

import { expect } from 'chai'
import { shallowMount } from '@vue/test-utils'
import login from '@/components/login'

describe('Login.vue', () => {
	it('renders props.msg when passed', () => {
    const msg = 'new message'
    const wrapper = shallowMount(login, {
      propsData: { msg }
    })
    expect(wrapper.text()).to.include(msg)
  })
})

login.vue

<template>
	<div id="login">
		<h1>{{msg}}</h1>
	</div>
</template>

<script>
export default {
	name: 'login-component',
	props: ['msg']
}
</script>

main.js

import Vue from 'vue'
import Vuex from 'vuex'
import axios from 'axios'
import VueHead from 'vue-head'
import './Filters/filters'
import './Mixins/mixins'
import './registerServiceWorker'

import App from './App'
import router from './router'
import store from './store/store'

import 'materialize-css'
import 'materialize-css/dist/css/materialize.css'
import '../public/css/font-awesome/css/font-awesome.min.css'
import '../public/css/c3/c3.min.css'
import 'animate.css/animate.min.css'
import 'vue-multiselect/dist/vue-multiselect.min.css'
import VueTheMask from 'vue-the-mask'
import Money from 'v-money'

Vue.use(VueTheMask)
Vue.use(Money)

Vue.router = router

Vue.use(VueHead)
Vue.use(Vuex)

axios.defaults.baseURL = process.env.VUE_APP_API_KEY

Vue.config.productionTip = process.env.NODE_ENV === 'development'

Vue.config.devtools = process.env.NODE_ENV === 'development'

Vue.config.silent = process.env.NODE_ENV === 'development'

export const bus = new Vue()

Vue.config.productionTip = false

new Vue({
  router,
  store,
  render: h => h(App)
}).$mount('#app')

package.json

{
  "name": "APP",
  "version": "2019.1.1",
  "private": true,
  "description": "Desenvolvimento da aplicação",
  "author": "Otávio Paganotti <otavio@otavio.com.br>",
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint",
    "test:e2e": "vue-cli-service test:e2e",
    "test:unit": "vue-cli-service test:unit -c -w"
  },
  "dependencies": {
    "@handsontable/vue": "^3.0.0",
    "@material/select": "^0.41.0",
    "@websanova/vue-auth": "^2.21.3-beta",
    "animate.css": "^3.7.0",
    "axios": "^0.18.0",
    "bootstrap-vue": "^2.0.0-rc.1",
    "c3": "^0.6.8",
    "datatables.net-dt": "^1.10.16",
    "file-saverjs": "^1.3.6",
    "handsontable": "^5.0.1",
    "lodash": "^4.17.11",
    "materialize-css": "^1.0.0-rc.2",
    "materialize-tags": "^1.2.3",
    "moment": "^2.21.0",
    "register-service-worker": "^1.5.2",
    "sweetalert": "^2.1.0",
    "tableexport": "^5.0.3",
    "v-money": "^0.8.1",
    "vue": "^2.5.17",
    "vue-axios": "^2.1.4",
    "vue-c3": "^1.2.9",
    "vue-head": "^2.0.12",
    "vue-input-tag": "^1.0.3",
    "vue-moment": "^3.2.0",
    "vue-multiselect": "^2.1.3",
    "vue-rangedate-picker": "^0.3.4",
    "vue-router": "^3.0.1",
    "vue-select": "^2.5.1",
    "vue-table-component": "^2.0.0-alpha.1",
    "vue-text-mask": "^6.1.2",
    "vue-the-mask": "^0.11.1",
    "vue-trumbowyg": "^3.4.0",
    "vue2-datepicker": "^2.6.3",
    "vuejs-auto-complete": "^0.6.5",
    "vuejs-datepicker": "^0.9.29",
    "vuex": "^3.0.1"
  },
  "devDependencies": {
    "@johmun/vue-tags-input": "^1.5.9",
    "@voerro/vue-tagsinput": "^1.10.0",
    "@vue/cli-plugin-babel": "^3.2.0",
    "@vue/cli-plugin-e2e-nightwatch": "^3.2.0",
    "@vue/cli-plugin-eslint": "^3.2.0",
    "@vue/cli-plugin-pwa": "^3.2.0",
    "@vue/cli-plugin-unit-mocha": "^3.2.0",
    "@vue/cli-service": "^3.2.0",
    "@vue/test-utils": "^1.0.0-beta.20",
    "babel-core": "7.0.0-bridge.0",
    "babel-eslint": "^10.0.1",
    "babel-jest": "^23.6.0",
    "chai": "^4.1.2",
    "eslint": "^5.8.0",
    "eslint-plugin-vue": "^5.0.0",
    "istanbul-instrumenter-loader": "^3.0.1",
    "jquery": "^3.3.1",
    "moxios": "^0.4.0",
    "node-sass": "^4.9.0",
    "nyc": "^13.1.0",
    "sass-loader": "^7.0.1",
    "vue-head": "^2.0.12",
    "vue-template-compiler": "^2.5.21"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/essential",
      "eslint:recommended"
    ],
    "rules": {},
    "parserOptions": {
      "parser": "babel-eslint"
    },
    "globals": {
      "$": true,
      "jQuery": true,
      "M": true
    }
  },
  "postcss": {
    "plugins": {
      "autoprefixer": {}
    }
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}

vue.config.js

var webpack = require('webpack')
process.env.VUE_APP_VERSION_APP = require('./package.json').version

module.exports = {
	configureWebpack: {
		plugins: [
			new webpack.ProvidePlugin({
				$: 'jquery',
				jquery: 'jquery',
				'window.jQuery': 'jquery',
				jQuery: 'jquery'
			})
		]
	}
}