test for whether PostGIS was actually installed

Gemfile

@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gem 'berkshelf'
 gem 'test-kitchen'
 gem 'kitchen-vagrant'
+gem 'busser-serverspec'
 
 # Uncomment these lines if you want to live on the Edge:
 #

Gemfile.lock

@@ -27,6 +27,10 @@ GEM
     buff-ruby_engine (0.1.0)
     buff-shell_out (0.1.1)
       buff-ruby_engine (~> 0.1.0)
+    busser (0.6.0)
+      thor
+    busser-serverspec (0.2.6)
+      busser
     celluloid (0.16.0.pre)
       timers (~> 2.0.0)
     celluloid-io (0.16.0.pre)
@@ -102,5 +106,6 @@ PLATFORMS
 
 DEPENDENCIES
   berkshelf
+  busser-serverspec
   kitchen-vagrant
   test-kitchen

test/integration/default/serverspec/postgis_extension_spec.rb

@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+describe "PostGIS Extension" do
+  get_postgis_version =<<-CMD
+su - postgres -c 'psql --user postgres -d template_postgis -c "select PostGIS_Full_Version();"'
+  CMD
+
+  describe command(get_postgis_version) do
+    it { should return_exit_status 0 }
+  end
+
+  describe command(get_postgis_version) do
+    it { should return_stdout(/POSTGIS=/) }
+  end
+end

test/integration/default/serverspec/spec_helper.rb

@@ -0,0 +1,9 @@
+require 'serverspec'
+require 'pathname'
+require 'net/ssh'
+
+include SpecInfra::Helper::Exec
+
+RSpec.configure do |c|
+end
+