Duplicate CI config node factory on class level

lib/gitlab/ci/config/node/configurable.rb

@@ -37,7 +37,9 @@ module Gitlab
           end
 
           class_methods do
-            attr_reader :allowed_nodes
+            def allowed_nodes
+              Hash[@allowed_nodes.map { |key, factory| [key, factory.dup] } ]
+            end
 
             private
 

lib/gitlab/ci/config/node/entry.rb

@@ -27,8 +27,8 @@ module Gitlab
           end
 
           def compose!
-            allowed_nodes.each do |key, factory|
-              @nodes[key] = create_node(key, factory.dup)
+            allowed_nodes.each do |key, essence|
+              @nodes[key] = create_node(key, essence)
             end
           end
 
@@ -62,7 +62,7 @@ module Gitlab
 
           private
 
-          def create_node(key, factory)
+          def create_node(key, essence)
             raise NotImplementedError
           end
         end

spec/lib/gitlab/ci/config/node/configurable_spec.rb

+require 'spec_helper'
+
+describe Gitlab::Ci::Config::Node::Configurable do
+  let(:node) { Class.new }
+
+  before do
+    node.include(described_class)
+  end
+
+  describe 'allowed nodes' do
+    before do
+      node.class_eval do
+        allow_node :object, Object, description: 'test object'
+      end
+    end
+
+    describe '#allowed_nodes' do
+      it 'has valid allowed nodes' do
+        expect(node.allowed_nodes).to include :object
+      end
+
+      it 'creates a node factory' do
+        expect(node.allowed_nodes[:object])
+          .to be_an_instance_of Gitlab::Ci::Config::Node::Factory
+      end
+
+      it 'returns a duplicated factory object' do
+        first_factory = node.allowed_nodes[:object]
+        second_factory = node.allowed_nodes[:object]
+
+        expect(first_factory).not_to be_equal(second_factory)
+      end
+    end
+  end
+end