reading the right param in the banner text file instead of just globb…

…ing all the contents

Signed-off-by: wdower <[email protected]>

controls/SV-238198.rb

@@ -120,13 +120,16 @@
   tag nist: ['AC-8 a']
   tag 'host', 'container'
 
-  banner_text = input('banner_text')
-  clean_banner = banner_text.gsub(/[\r\n\s]/, '')
+  expected_banner_text = input('banner_text')
+  clean_banner = expected_banner_text.gsub(/[\r\n\s]/, '')
   gdm3_defaults_file = input('gdm3_config_file')
 
+  actual_banner_text = parse_config_file('/etc/gdm3/greeter.dconf-defaults').params['org/gnome/login-screen']['banner-message-text']
+  clean_actual_banner = actual_banner_text.gsub(/[\r\n\s]/, '')
+
   if package('gdm3').installed?
     describe 'The SSHD Banner is set to the standard banner and has the correct text' do
-      subject { file(gdm3_defaults_file).content.gsub(/[\r\n\s]/, '') }
+      subject { clean_actual_banner }
       it { should cmp clean_banner }
     end
   else