resolved_spec: test for NSS library packages installed on Debian family

Author: kenyon

spec/acceptance/resolved_spec.rb

@@ -25,6 +25,16 @@
     end
 
     it { expect(package('systemd-resolved')).to be_installed } if has_package
+
+    if fact('os.family') == 'Debian'
+      %w[
+        myhostname
+        resolve
+        systemd
+      ].each do |pkg|
+        expect(package("libnss-#{pkg}")).to be_installed
+      end
+    end
   end
 
   context 'configure systemd stopped' do