Added model test

Added test for physical ticket model.

spec/factories/physical_ticket.rb

@@ -0,0 +1,5 @@
+FactoryGirl.define do
+  factory :physical_ticket do
+    ticket_purchase
+  end
+end

spec/factories/ticket_purchases.rb

@@ -4,5 +4,11 @@ FactoryGirl.define do
     conference
     ticket
     quantity 10
+    factory :paid_ticket_purchase do
+      after(:build) do |ticket_purchase|
+        payment = create(:payment)
+        ticket_purchase.pay(payment)
+      end
+    end
   end
 end

spec/models/physical_ticket_spec.rb

@@ -0,0 +1,14 @@
+require 'spec_helper'
+
+describe PhysicalTicket do
+
+  describe 'association' do
+    it { is_expected.to belong_to :ticket_purchase }
+  end
+
+  describe 'validations' do
+    it 'has a valid factory' do
+      expect(build(:physical_ticket)).to be_valid
+    end
+  end
+end

spec/models/ticket_purchase_spec.rb

@@ -114,22 +114,4 @@ describe TicketPurchase do
       expect(message.blank?).to be true
     end
   end
-
-  describe 'after_create' do
-    let(:ticket_purchase) { create(:ticket_purchase, quantity: 4, paid: true) }
-
-    it 'creates physical tickets equal to the quantity of purchase' do
-      expect(ticket_purchase.physical_tickets.count).to eq(4)
-    end
-  end
-
-  describe 'after_update' do
-    let(:ticket_purchase) { create(:ticket_purchase, quantity: 5) }
-
-    it 'creates physical tickets if the payment is made successfully' do
-      ticket_purchase
-      ticket_purchase.paid = true
-      expect{ ticket_purchase.save }.to change{ ticket_purchase.physical_tickets.count }.from(0).to(5)
-    end
-  end
 end