metamask-extension/test/unit/migrations/template-test.js

const assert = require('assert')
const migrationTemplate = require('../../../app/scripts/migrations/template')
const properTime = (new Date()).getTime()
const storage = {
  meta: {},
  data: {},
}

describe('storage is migrated successfully', () => {
  it('should work', (done) => {
    migrationTemplate.migrate(storage)
    .then((migratedData) => {
      assert.equal(migratedData.meta.version, 0)
      done()
    }).catch(done)
  })
})