Install the service, and make sure we set ENABLED=1 in /etc/default/haproxy

files/haproxy.default.etc

@@ -0,0 +1 @@
+ENABLED=1

manifests/init.pp

@@ -6,4 +6,20 @@ class haproxy {
     'haproxy' :
       ensure => present;
   }
+
+  service {
+    'haproxy' :
+      enable     => true,
+      hasrestart => true,
+      hasstatus  => true,
+      ensure     => running;
+  }
+
+  file {
+    '/etc/default/haproxy' :
+      ensure => present,
+      owner  => 'root',
+      group  => 'root',
+      source => 'puppet:///modules/haproxy/haproxy.default.etc';
+  }
 }

spec/classes/haproxy_spec.rb

@@ -16,5 +16,23 @@ describe 'haproxy' do
         'ensure' => 'present'
       )
     end
+
+    it 'should install the haproxy service' do
+      subject.should contain_service('haproxy').with(
+        'ensure'     => 'running',
+        'enable'     => 'true',
+        'hasrestart' => 'true',
+        'hasstatus'  => 'true'
+      )
+    end
+
+    it 'should install a new /etc/default/haproxy' do
+      subject.should contain_file('/etc/default/haproxy').with(
+        'ensure' => 'present',
+        'owner'  => 'root',
+        'group'  => 'root',
+        'source' => 'puppet:///modules/haproxy/haproxy.default.etc'
+      )
+    end
   end
 end