Add unit test for settings.py header

spec/classes/settings_header_spec.rb

@@ -0,0 +1,68 @@
+require 'spec_helper'
+
+describe 'pulpcore' do
+  on_supported_os.each do |os, os_facts|
+    context "on #{os}" do
+      let(:facts) { os_facts }
+
+      context 'default params' do
+        it { is_expected.to compile.with_all_deps }
+
+        it 'adds default header to settings.py' do
+          is_expected.to contain_concat__fragment('base')
+            .with_content(
+              Regexp.new(<<~HEADER.chomp),
+                ################################################################################
+                # !!! WARNING: DO NOT EDIT THIS FILE !!!                                       #
+                ################################################################################
+                # File managed by Puppet.                                                      #
+                # Module: pulpcore                                                             #
+                ################################################################################
+                # Not only are your edits likely to be overwritten, there is also a strong     #
+                # possibility of breaking your system if you change configuration here without #
+                # making required changes elsewhere. Refer to the documentation you used to    #
+                # install Pulpcore to determine the safe and persistent way to modify the      #
+                # configuration.                                                               #
+                ################################################################################
+
+                CONTENT_HOST =
+              HEADER
+            )
+        end
+      end
+
+      context 'with custom config header strings' do
+        let :manifest do
+          <<~PUPPET
+            class { pulpcore::header_strings:
+              custom_installer_name       => 'my_pulpcore_installer',
+              custom_settings_explanation => "Don't even think about it."
+            }
+
+            include pulpcore
+          PUPPET
+        end
+
+        it { is_expected.to compile.with_all_deps }
+
+        it 'adds customized header to settings.py' do
+          is_expected.to contain_concat__fragment('base')
+            .with_content(
+              Regexp.new(<<~HEADER.chomp),
+                ################################################################################
+                # !!! WARNING: DO NOT EDIT THIS FILE !!!                                       #
+                ################################################################################
+                # File managed by my_pulpcore_installer.                                       #
+                # Module: pulpcore                                                             #
+                ################################################################################
+                # Don't even think about it.                                                   #
+                ################################################################################
+
+                CONTENT_HOST =
+              HEADER
+            )
+        end
+      end
+    end
+  end
+end