use rspec-puppet-facts for source_spec

spec/defines/source_spec.rb

@@ -1,34 +1,33 @@
 require 'spec_helper'
 
 describe 'fluentd::source' do
-  let(:facts) {
-    {
-      :osfamily        => 'Debian',
-      :lsbdistid       => 'Ubuntu',
-      :operatingsystem => 'Ubuntu',
-      :lsbdistcodename => 'precise',
-      :architecture    => 'amd64',
-    }
-  }
-  let(:pre_condition) { 'include fluentd' }
+  on_supported_os.each do |os, facts|
+    context "on #{os}" do
+      let :facts do
+        facts
+      end
 
-  context 'basic source' do
-    let(:title) { 'test' }
-    let(:params) do
-      {
-          priority: '10',
-          config: {
-            'type'   => 'tail',
-            'format' => 'json',
-            'path'   => '/var/log/test-application/*.json',
-            'tag'    => 'application.test'
+      let(:pre_condition) { 'include fluentd' }
+
+      describe 'basic source' do
+        let(:title) { 'test' }
+        let(:params) do
+          {
+              priority: '10',
+              config: {
+                'type'   => 'tail',
+                'format' => 'json',
+                'path'   => '/var/log/test-application/*.json',
+                'tag'    => 'application.test'
+              }
           }
-      }
-    end
+        end
 
-    it do
-      is_expected.to contain_file('/etc/td-agent/conf.d/10-source-test.conf').
-          with_content(IO.read(File.join(File.dirname(__FILE__), '../fixtures/files/source_tail.conf')))
+        it do
+          is_expected.to contain_file('/etc/td-agent/conf.d/10-source-test.conf').
+              with_content(IO.read(File.join(File.dirname(__FILE__), '../fixtures/files/source_tail.conf')))
+        end
+      end
     end
   end
 end