Added photo model

spec/factories/photos.rb

@@ -0,0 +1,12 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :photo do
+    picture_file_name 'rails.png'
+    picture_content_type 'image/png'
+    picture_file_size '1024'
+    picture_updated_at DateTime.now
+    description 'Lorem Ipsum Dolor'
+    conference
+  end
+end

spec/models/photo_spec.rb

@@ -0,0 +1,14 @@
+require 'spec_helper'
+
+describe Photo do
+  describe 'validations' do
+
+    it 'has a valid factory' do
+      expect(build(:photo)).to be_valid
+    end
+
+    it 'is not valid without a picture' do
+      should validate_presence_of(:picture)
+    end
+  end
+end