Dump and load options and sub_elements

Previously, ROS did not play well when being dump and loaded with Marshal because the options from ROS did not translate through the serialization. This change saves the information through marshal_dump and then reassigns the information to ROS instance when the object is loaded.

lib/recursive_open_struct.rb

@@ -39,6 +39,14 @@ def initialize(hash=nil, passed_options={})
     @sub_elements = {}
   end
 
+  def marshal_load(attributes)
+    hash, @options, @sub_elements = attributes
+    super(hash)
+  end
+
+  def marshal_dump
+    [super, @options, @sub_elements]
+  end
 
   if OpenStruct.public_instance_methods.include?(:initialize_copy)
     def initialize_copy(orig)

spec/recursive_open_struct/recursion_spec.rb

@@ -37,6 +37,14 @@
       expect(ros.blah.changed).to eql 'backing'
     end
 
+    it "handles being dump then loaded by Marshal" do
+      foo_struct = [RecursiveOpenStruct.new]
+      bar_struct = RecursiveOpenStruct.new(foo: foo_struct)
+      serialized = Marshal.dump(bar_struct)
+
+      expect(Marshal.load(serialized).foo).to eq(foo_struct)
+    end
+
     describe "handling loops in the original Hashes" do
       let(:h1) { { :a => 'a'} }
       let(:h2) { { :a => 'b', :h1 => h1 } }
@@ -182,6 +190,17 @@
       let(:blah_list) { [ { :foo => '1' }, { :foo => '2' }, 'baz' ] }
       let(:h) { { :blah => blah_list } }
 
+      context "when dump and loaded by Marshal" do
+        let(:test) { RecursiveOpenStruct.new(h, :recurse_over_arrays => true) }
+        subject { Marshal.load(Marshal.dump(test))}
+
+        it { expect(subject.blah.length).to eq 3 }
+        it { expect(subject.blah[0].foo).to eq '1' }
+        it { expect(subject.blah[1].foo).to eq '2' }
+        it { expect(subject.blah_as_a_hash).to eq blah_list }
+        it { expect(subject.blah[2]).to eq 'baz' }
+      end
+
       context "when recursing over arrays is enabled" do
         subject { RecursiveOpenStruct.new(h, :recurse_over_arrays => true) }