require 'rails_helper'

RSpec.describe Product, type: :model do

  let!(:product) { create(:product) }
  let!(:cart) { create(:cart) }

  describe 'validations' do
    it { is_expected.to validate_presence_of :name }
    it { is_expected.to validate_numericality_of :price }
  end

  describe 'ActiveRecord associations' do
    it { is_expected.to have_many :line_items }
    it { is_expected.to belong_to :category }
  end

  describe "ensure_not_referenced_by_any_line_item" do
    context "item has no line items" do
      it "returns true" do
        expect(product.ensure_not_referenced_by_any_line_item).to eq true
      end
    end

    context "item has line items" do
      it "returns false" do
        LineItem.create!(product_id: product.id, cart_id: cart.id, quantity: 1)
        expect(product.ensure_not_referenced_by_any_line_item).to eq false
      end
    end
  end
end