Refactoring Tickets

- Tickets now independent from registration
- Implemented money gem
#419

spec/features/ticket_purchases_spec.rb

@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+feature Registration do
+  let!(:ticket) { create(:ticket) }
+  let!(:conference) { create(:conference, title: 'ExampleCon', tickets: [ticket]) }
+  let!(:participant) { create(:user) }
+
+  context 'as a participant' do
+    before(:each) do
+      sign_in participant
+    end
+
+    after(:each) do
+      sign_out
+    end
+
+    context 'who is not registered' do
+
+      scenario 'purchases a ticket', feature: true, js: true do
+        visit root_path
+        click_link 'Support'
+
+        fill_in "tickets__#{ticket.id}", with: '2'
+        expect(current_path).to eq(conference_tickets_path(conference.short_title))
+
+        click_button 'Support'
+
+        purchase = TicketPurchase.where(user_id: participant.id, ticket_id: ticket.id).first
+        expect(purchase.quantity).to eq(2)
+        expect(current_path).to eq(conference_conference_registrations_path(conference.short_title))
+        expect(flash).
+            to eq('Congratulations, you have successfully purchased a ticket! You can pay it cash on check in! Thank you for supporting ExampleCon!')
+        expect(page.has_content?('Business Ticket')).to be true
+      end
+
+      scenario 'deletes a purchased ticket', feature: true, js: true do
+        create(:ticket_purchase,
+               user_id: participant.id,
+               ticket_id: ticket.id,
+               quantity: 2)
+
+        visit conference_conference_registrations_path(conference.short_title)
+        expect(page.has_content?('Business Ticket')).to be true
+
+        click_link 'Delete'
+        expect(flash).to eq('Ticket successfully destroyed.')
+        expect(TicketPurchase.count).to eq(0)
+      end
+    end
+  end
+end