Page objects in Ruby for use with Capybara

gistfile1.rb

class ProductForm
  attr_reader :page, :form
  
  def initialize(page)
    @page = page
    @form = page.find('form.new_product')
  end
  
  def title=(new_title)
    form.fill_in 'product_title', with: new_title
  end
  
  def save
    form.click_button 'Create Product'
  end
  
  def has_validation_errors?
    form.has_css?('.error')
  end
end

RSpec.describe 'Creating a product' do
  it 'shows validation errors when the name is too short' do
    visit '/products/new'
    product_form = ProductForm.new(page)
    product_form.title = 'x'
    product_form.save
    expect(product_form).to have_validation_errors
  end
end