Debug Mocha, vue-cli 3 es module tests, in vscode (requires debugger statements)

example.spec.js

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

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

launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Mocha Current File",
            "sourceMaps": true,
            "outFiles": [
                "${workspaceFolder}/**/*.js"
            ],
            "program": "${workspaceFolder}/node_modules/.bin/vue-cli-service",
            "args": [
                "test:unit",
                "--inspect-brk",
                "--watch",
                "--timeout",
                "900000",
                "${file}"
            ],
            "port": 9229,
            "internalConsoleOptions": "neverOpen"
        }
    ]
}

package.json

{
  "name": "NAME",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "test:unit": "vue-cli-service test:unit",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "vue": "^2.6.10"
  },
  "devDependencies": {
    "@vue/cli-plugin-eslint": "^4.1.0",
    "@vue/cli-plugin-unit-mocha": "^4.1.0",
    "@vue/cli-service": "^4.1.0",
    "@vue/eslint-config-standard": "^4.0.0",
    "@vue/test-utils": "1.0.0-beta.29",
    "babel-eslint": "^10.0.3",
    "babel-preset-env": "^1.7.0",
    "chai": "^4.1.2",
    "eslint": "^5.16.0",
    "eslint-plugin-vue": "^5.0.0",
    "vue-template-compiler": "^2.6.10"
  }
}