Adds support for integration testing

with aruba and rspec using custom example groups

This prepares code for aeolus-incubator#35 and aeolus-incubator#36

spec/spec_helper.rb

@@ -0,0 +1,3 @@
+# Requires supporting ruby files with custom matchers and macros, etc,
+# in spec/support/ and its subdirectories.
+Dir[File.join("./spec/support/**/*.rb")].each {|f| require f}

spec/support/example_groups/integration_example_group.rb

@@ -0,0 +1,36 @@
+require 'active_support/concern'
+require 'aruba/api'
+
+module IntegrationExampleGroup
+  extend ActiveSupport::Concern
+
+  included do
+    metadata[:type] = :integration
+
+    let(:executable) { "aeolus" }
+    let(:command) { "" }
+    let(:params) { "" }
+    let(:cmd) { [ executable, command, params ].select{|s| !s.empty?}.join(' ') }
+
+    before(:each) do
+      run_simple(unescape(cmd), false)
+    end
+
+    subject do
+      groups = example.example_group.ancestors.clone
+      groups << example.example_group
+      if groups.find{|g| g.metadata[:example_group][:description] == "stdout"}
+        all_stdout
+      elsif groups.find{|g| g.metadata[:example_group][:description] == "stderr"}
+        all_stderr
+      end
+    end
+  end
+
+  RSpec.configure do |config|
+    config.include Aruba::Api
+    config.include self,
+      :type => :integration,
+      :example_group => { :file_path => %r(spec/integration) }
+  end
+end