metamask-extension/test/unit/keyring-controller-test.js

var assert = require('assert')
var KeyringController = require('../../app/scripts/keyring-controller')
var configManagerGen = require('../lib/mock-config-manager')
const ethUtil = require('ethereumjs-util')
const async = require('async')

describe('KeyringController', function() {

  describe('#createNewVault', function () {
    let keyringController
    let password = 'password123'
    let entropy = 'entripppppyy duuude'
    let seedWords
    let accounts = []
    let originalKeystore

    before(function(done) {
      window.localStorage = {} // Hacking localStorage support into JSDom

      keyringController = new KeyringController({
        configManager: configManagerGen(),
        ethStore: {
          addAccount(acct) { accounts.push(ethUtil.addHexPrefix(acct)) },
        },
      })

      keyringController.createNewVault(password, entropy, (err, seeds) => {
        assert.ifError(err, 'createNewVault threw error')
        seedWords = seeds
        originalKeystore = keyringController._idmgmt.keyStore
        done()
      })
    })
  })
})