enable preprocess_deferred

Author: LukasAud

spec/acceptance/deferred_spec.rb

@@ -17,10 +17,25 @@ def read_win_file_if_exists(path)
   { exists: exists, content: exists ? body : '' }
 end
 
+RSpec.configure do |config|
+  config.before(:all) do
+    # Ensure Deferred values are preprocessed before provider runs (Puppet 8 default is false)
+    run_shell('puppet config set preprocess_deferred true --section agent')
+    # Ensure JSON catalog serialization (avoids PSON issues with Deferred)
+    run_shell('puppet config set preferred_serialization_format json --section agent')
+
+    # Assert settings for clear diagnostics in CI logs
+    pp  = run_shell('puppet config print preprocess_deferred --section agent').stdout.strip
+    fmt = run_shell('puppet config print preferred_serialization_format --section agent').stdout.strip
+    raise 'preprocess_deferred not true on agent!' unless pp.casecmp('true').zero?
+    raise 'preferred_serialization_format not json on agent!' unless fmt.casecmp('json').zero?
+  end
+end
+
 describe 'deferred values with dsc_lite' do
   let(:control_manifest)         { read_fixture('01_file_deferred.pp') }
   let(:dsc_deferred_direct)      { read_fixture('02_dsc_deferred_direct.pp') }
-  let(:dsc_deferred_inline)      { read_fixture('02b_dsc_deferred_inline.pp') } # <— NEW
+  let(:dsc_deferred_inline)      { read_fixture('02b_dsc_deferred_inline.pp') } # NEW
   let(:dsc_deferred_stringified) { read_fixture('03a_dsc_deferred_stringified.pp') }
   let(:dsc_deferred_bad_unwrap)  { read_fixture('03b_dsc_deferred_bad_unwrap.pp') }