Add #freeze override

lib/recursive_open_struct.rb

@@ -132,6 +132,14 @@ def method_missing(mid, *args)
     end
   end
 
+  def freeze
+    @table.each_key do |key|
+      new_ostruct_member!(key)
+    end
+
+    super
+  end
+
   # TODO: Rename to new_ostruct_member! once we care less about Rubies before
   # 2.4.0.
   def new_ostruct_member(name)

spec/recursive_open_struct/open_struct_behavior_spec.rb

@@ -116,7 +116,7 @@
         ros.freeze
       end
 
-      it "can read existing keys", pending: 'Awaiting fix' do
+      it "can read existing keys" do
         expect(ros.asdf).to eq 'John Smith'
       end
 
@@ -127,6 +127,22 @@
       it "cannot write existing keys" do
         expect { ros.asdf = 'new_value' }.to raise_error FrozenError
       end
+
+      context "with recursive structure" do
+        let(:hash) { { :key => { :subkey => 42 } } }
+
+        it "can read existing sub-elements" do
+          expect(ros.key.subkey).to eq 42
+        end
+
+        it "can write new sub-elements" do
+          expect { ros.key.new_subkey = 43 }.not_to raise_error
+        end
+
+        it "can write existing sub-elements" do
+          expect { ros.key.subkey = 43 }.not_to raise_error
+        end
+      end
     end
   end # describe behavior it inherits from OpenStruct
 end