Added photo model

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