zammad/spec/factories/recent_view.rb

FactoryBot.define do
  factory :recent_view do
    transient do
      o         { Ticket.first }
      user_role { :agent }
    end

    recent_view_object_id { ObjectLookup.by_name(o.class.name) }
    o_id { o.id }

    # assign to an existing user, if possible
    created_by_id do
      User.find { |u| u.role?(user_role.capitalize) }&.id ||
        create("#{user_role}_user").id
    end
  end
end