Switch sessions in test

session_switch.rb

When(/^nothing$/) do
  user1 = FactoryBot.create(:account_user)
  user2 = FactoryBot.create(:account_user)

  user1_session = User.serialize_into_session(user1)
  user2_session = User.serialize_into_session(user2)

  inject_session 'warden.user.user.key' => user1_session

  visit '/'

  inject_session 'warden.user.user.key' => user2_session

  visit '/'

  inject_session 'warden.user.user.key' => user1_session

  visit '/'
end