How to fabricate hashes and open structures

fabricator.rb

# spec/fabricators/stuff.rb
Fabricator(:one_stuff, from: :open_struct) do
  name 'Pedro'
end

Fabricator(:second_stuff, from: :hash) do
  after_build do |s|
    s['name'] = 'Jose'
  end
end

# spec/models/example_spec.rb

require 'spec_helper'
require 'fabrication'

describe 'A class' do
  let(:something) { Fabricate.build(:one_stuff) }
  let(:elsei) { Fabricate.build(:second_stuff) }

  it 'is true' do
    expect(something.name).to eq('Pedro')
    expect(elsei).to eq({ 'name' => 'Jose' })
  end
end