require 'rails_helper'
         RSpec.describe Users::RegistrationsController, type: :controller do
           describe 'sign in' do
            before do
              @user=build(:user)
              @request.env["devise.mapping"] = Devise.mappings[:user]
            end
            it 'adds 60 point with default' do
              post :create ,  params: {name: @user.name , sex: @user.sex , age: @user.age ,country: @user.country ,email: @user.email ,password: @user.password, password_confirmation: @user.password , confirmed_at: DateTime.now }
             expect(response).to render_template root_path
             expect(@user.points).to eq (60)
           end
         end
       end

class Users::RegistrationsController < Devise::RegistrationsController
             def create
              super
              if resource.save
                resource.rewards.create(point: 60)
              end
             end
       end

Rails.application.routes.draw do
                devise_for :users, controllers: {
                  registrations: 'users/registrations' ,
                 }
               end

expected: 60
            got: 0

Couldn't find User without an ID

class User < ActiveRecord::Base
         devise :database_authenticatable, :registerable,
           :recoverable, :rememberable, :trackable, :validatable, :confirmable, :timeoutable, :omniauthable, :omniauth_providers => [:facebook]

          default_scope -> {order(created_at: :desc)}

          validates :name , presence: true , length: {maximum: 18}
          validates :sex , presence: true
          validates :age , presence: true
          validates :country , presence: true

          def points(force_reload = false)
           self.rewards(force_reload).sum(:point)
          end
        end