React select box selection

feature_spec.rb

scenario 'I can select an option through js rendered element', js: true do
  fill_in 'email', with: '[email protected]'
  script = "$('#role').val('admin')"
  page.execute_script(script)
  page.execute_script("React.addons.TestUtils.Simulate.change(document.getElementById('role'))")

  click_button 'Add User'

  expect(unread_emails_for('[email protected]').size).to eq(1)
end