style(rubocop): fix Rubocop offenses

test/integration/default/controls/config_spec.rb

@@ -1,5 +1,6 @@
-control 'UFW configuration' do
+# frozen_string_literal: true
 
+control 'UFW configuration' do
   title 'Test UFW configuration'
 
   describe directory('/etc/ufw') do
@@ -13,56 +14,56 @@ control 'UFW configuration' do
 
   describe command('ufw status verbose | grep Status') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /active/ }
+    its('stdout') { should match(/active/) }
   end
 
   describe command('ufw status verbose | grep Logging') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /low/ }
+    its('stdout') { should match(/low/) }
   end
 
   describe command('ufw status | grep MySQL') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /ALLOW/ }
+    its('stdout') { should match(/ALLOW/) }
   end
 
   describe command('ufw status | grep Postgresql') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /LIMIT/ }
+    its('stdout') { should match(/LIMIT/) }
   end
 
   describe command('ufw status | grep SSH223') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /DENY/ }
+    its('stdout') { should match(/DENY/) }
   end
 
   describe command('ufw status | grep 10.0.0.0') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /DENY/ }
+    its('stdout') { should match(/DENY/) }
   end
 
   describe command('ufw status | grep 22/tcp') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /LIMIT/ }
+    its('stdout') { should match(/LIMIT/) }
   end
 
   describe command('ufw status | grep 80/tcp') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /DENY/ }
+    its('stdout') { should match(/DENY/) }
   end
 
   describe command('ufw status | grep 443/tcp') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /ALLOW/ }
+    its('stdout') { should match(/ALLOW/) }
   end
 
   describe command('ufw status | grep 10.0.0.1') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /DENY/ }
+    its('stdout') { should match(/DENY/) }
   end
 
   describe command('ufw status | grep 10.0.0.2') do
     its('exit_status') { should eq 0 }
-    its('stdout') { should match /DENY/ }
+    its('stdout') { should match(/DENY/) }
   end
 end

test/integration/default/controls/package_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 control 'UFW package' do
   title 'should be installed'