Support validation in non-main ractors

Author: rmosolgo

lib/graphql/static_validation/rules/unique_directives_per_location.rb

@@ -19,13 +19,17 @@ module UniqueDirectivesPerLocation
         :on_field,
       ]
 
-      DIRECTIVE_NODE_HOOKS.each do |method_name|
-        define_method(method_name) do |node, parent|
+      VALIDATE_DIRECTIVE_LOCATION_ON_NODE = <<~RUBY
+        def %{method_name}(node, parent)
           if !node.directives.empty?
             validate_directive_location(node)
           end
           super(node, parent)
         end
+      RUBY
+      DIRECTIVE_NODE_HOOKS.each do |method_name|
+        # Can't use `define_method {...}` here  because the proc can't be isolated for use in non-main Ractors
+        module_eval(VALIDATE_DIRECTIVE_LOCATION_ON_NODE % { method_name: method_name }) # rubocop:disable Development/NoEvalCop
       end
 
       private

spec/graphql/schema/ractor_shareable_spec.rb

@@ -17,13 +17,14 @@ class Query < GraphQL::Schema::Object
     end
 
     it "can access some basic GraphQL objects" do
-
       ractor = Ractor.new do
         parent = Ractor.receive
-        query = GraphQL::Query.new(RactorExampleSchema, "{ __typename}", validate: false )
+        query = GraphQL::Query.new(RactorExampleSchema, "{ __typename }" )
         parent.send(query.class.name)
         result = query.result.to_h
         parent.send(result)
+      rescue StandardError => err
+        parent.send(err)
       end
       ractor.send(Ractor.current)
       assert_equal "GraphQL::Query", Ractor.receive