Adds sponsor model

spec/models/sponsor_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe Sponsor do
+  describe 'validations' do
+    it 'has a valid factory' do
+      expect(build(:sponsor)).to be_valid
+    end
+
+    it 'is not valid without a name' do
+      should validate_presence_of(:name)
+    end
+
+    it 'is not valid without a website url' do
+      should validate_presence_of(:website_url)
+    end
+  end
+end