Is it the same thing?

After.rb

factory :user do
    email    { Faker::Internet.email}
    #Lots of declarations
    #....
    adresse

    factory :user_with_recurring_order_to_generate do
      after(:build) do |u|
        u.contrats << build(:contrat_with_active_product)
      end
    end
  end

Before.rb

factory :user do
    email    { Faker::Internet.email}
    #Lots of declarations
    #....
    adresse
  end

  factory :user_with_recurring_order_to_generate, parent: :user do
    #here is the deprecation
    after(:build) {|u| FactoryGirl.create(:contrat_with_active_product, :user=>u)}
  end

test.rb

describe "Can the suer" do
    let(:option) { FactoryGirl.build(:option)}
    let(:user) { FactoryGirl.build(:user)}
    let(:produit) { FactoryGirl.build(:produit)}
    
    it "buy this option when it's in the basket?" do
      assert !user.option_can_be_purchased?(option)
      assert user.get_contrat.add(produit.id,produit.pricings.first)
      option.produit=produit
      pp user.contrats[0]
      pp user.contrats.count
      pp user.contrats
      assert user.contrats.count == 1
      assert user.option_can_be_purchased?(option)
    end
  end

  describe "Un utilisateur est abonné a un produit" do
    let(:user) { FactoryGirl.create(:user_with_recurring_order_to_generate)}
    it "génère les factures anciennes" do
      assert user.contrats.count==1
      Timecop.travel(Timecop.travel(Time.new(2013,02,28,20,15,1)))
      user.create_recurring_billing
      assert user.get_active_goods(Time.now.to_date.prev_month).count == 1
      assert user.get_active_goods.count == 1
      assert user.contrats.count==3
      Timecop.return
    end
  end