Tests for registration model

Before registration we need to make sure that conference has registration_period

spec/models/registration_spec.rb

@@ -1,24 +1,79 @@
-#!/bin/env ruby
-# encoding: utf-8
 require 'spec_helper'
 
-describe 'Registration' do
-  describe 'validations' do
+describe Registration do
+  subject { create(:registration) }
+
+  describe 'validation' do
+
     it 'has a valid factory' do
       expect(build(:registration)).to be_valid
     end
 
+    it { should validate_presence_of(:user) }
+
+    it 'validates uniqueness of user in scope of conference' do
+      expect(build(:registration, conference: subject.conference, user: subject.user)).not_to be_valid
+    end
+
     describe 'registration_limit_not_exceed' do
-      it 'is not valid when limit exceeded' do
-        conference = build(:conference)
-        conference.registration_limit = 1
-        registration1 = build(:registration, conference: conference)
-        registration1.save
-        registration2 = build(:registration, conference: conference)
-        registration2.save
-        expect(conference.registrations.size).to be 1
-        expect(registration2.valid?).to be false
-        expect(registration2.errors.full_messages).to eq(['Registration limit exceeded'])
+      context 'registration_limit has exceeded' do
+        before do
+          conference = create(:conference, registration_limit: 1)
+          create(:registration, conference: conference)
+          @second_registration = build(:registration, conference: conference)
+        end
+
+        it 'is not valid factory' do
+          expect(@second_registration.valid?).to be false
+          expect(@second_registration.errors.full_messages).to eq(['Registration limit exceeded'])
+        end
+      end
+    end
+  end
+
+  describe 'association' do
+    it { should belong_to(:user) }
+    it { should belong_to(:conference) }
+    it { should belong_to(:dietary_choice) }
+    it { should have_and_belong_to_many(:social_events) }
+    it { should have_and_belong_to_many(:events) }
+    it { should have_and_belong_to_many(:qanswers) }
+    it { should have_and_belong_to_many(:vchoices) }
+    it { should have_many(:events_registrations) }
+    it { should have_many(:workshops) }
+  end
+
+  describe 'callback' do
+    after { subject.run_callbacks(:create) }
+
+    # set_week and subscribe_to_conference are private methods
+    describe '#set_week' do
+      before { subject.created_at = Time.utc(2014, 5, 10) }
+
+      it 'sets week of registration' do
+        expect(subject).to receive(:set_week)
+        expect(subject.week).to eq 18
+      end
+    end
+
+    describe '#subscribe_to_conference' do
+      it 'subscribes to conference' do
+        expect(subject).to receive(:subscribe_to_conference)
+        expect(subject.user.subscribed?(subject.conference)).to be_truthy
+      end
+    end
+
+    it 'sends registrations mail' do
+      expect(subject).to receive(:send_registration_mail)
+    end
+  end
+
+  describe 'method' do
+    describe '#week' do
+      before { subject.created_at = Date.new(2014, 06, 30) }
+
+      it 'returns week number of created_at' do
+        expect(subject.week).to eq(26)
       end
     end
   end