(feat) - add overwrite_facts option

lib/rspec-puppet-facts.rb

@@ -229,7 +229,10 @@ def self.with_custom_facts(os, facts)
       next if fact[:options][:confine] && !fact[:options][:confine].include?(os)
       next if fact[:options][:exclude] && fact[:options][:exclude].include?(os)
 
-      if fact[:value].respond_to?(:call)
+      # if overwrite_fact passed, replace entire fact in facts hash with values supplied
+      if fact[:options][:overwrite_fact]
+        facts[name.to_sym] = fact[:value].respond_to?(:call) ? fact[:value].call(os, facts) : fact[:value]
+      elsif fact[:value].respond_to?(:call)
         facts = facts.deep_merge!({name.to_sym => fact[:value].call(os, facts)})
       else
         facts = facts.deep_merge!({name.to_sym => fact[:value]})

spec/rspec_puppet_facts_spec.rb

@@ -904,6 +904,22 @@
       expect(subject['redhat-7-x86_64'][:root_home]).to eq '/root'
     end
 
+    it 'deep merges fact and values' do
+      add_custom_fact 'identity', { 'user' => "test_user" }
+      expect(subject['redhat-7-x86_64'][:identity]).to eq({
+        "gid"=>0,
+        "group"=>"root",
+        "privileged"=>true,
+        "uid"=>0,
+        "user"=>"test_user"
+        })
+    end
+
+    it 'overwrites fact and values' do
+      add_custom_fact 'identity', { 'user' => 'root' }, :overwrite_fact => true
+      expect(subject['redhat-7-x86_64'][:identity]).to eq({ 'user' => 'root' })
+    end
+
     it 'confines a fact to a particular operating system' do
       add_custom_fact 'root_home', '/root', :confine => 'redhat-7-x86_64'
       expect(subject['redhat-7-x86_64'][:root_home]).to eq '/root'