Add an assertion.

Mostly, this implies adding all of the boilerplate needed to start using
rspec-puppet with fixtures and whatnot.

spec/classes/bind_spec.rb

@@ -0,0 +1,17 @@
+# ex: syntax=ruby ts=2 sw=2 si et
+require 'spec_helper'
+
+describe 'bind' do
+  let(:facts) { { :concat_basedir => '/wtf' } }
+
+  context 'on Debian-derived systems' do
+    let(:facts) { super().merge({ :osfamily => 'Debian' }) }
+    
+    it { should contain_package('bind').with({
+        'ensure' => 'latest',
+        'name' => 'bind9'
+      })
+    }
+  end
+
+end