问如何使用Mocha测试需要Node API的自定义模块？“无法读取未定义的属性'require‘”

EN

const filebrowser = require("../src/filebrowser.js")

const {remote} = require('electron');
const fs = remote.require('fs');

const Application = require('spectron').Application
const assert = require('assert')
const electronPath = require('electron') // Require Electron from the binaries included in node_modules.
const path = require('path')
const filebrowser = require("../src/filebrowser.js")

describe('Application launch', function () {
  this.timeout(10000)

  beforeEach(function () {
    this.app = new Application({
      path: electronPath,

      // use the main.js file in package.json located 1 level above.
      args: [path.join(__dirname, '..')]
    })

    return this.app.start()
  })

  afterEach(function () {
    if (this.app && this.app.isRunning()) {
        return this.app.stop()
    }
  })

  it('shows an initial window', function () {
    return this.app.client.getWindowCount().then(function (count) {
        assert.equal(count, 1)
    })
  })
})

const {remote} = require('electron');
const fs = remote.require('fs');
const Path = require('path');

module.exports = {        
    //note that I would be calling fs functions in here, but I never get that far because the error happens on remote.require('fs')
    determineFiletype: function(currentDirectory, fileName){}
}