Commit 8da3e75

@@ -0,0 +1,1 @@
+# frozen_string_literal: true

@@ -0,0 +1,13 @@
+
+# frozen_string_literal: true
+
+module Saml
+  module Kit
+    module Builders
+      # This class is responsible for rendering an empty xml element
+      class Null
+        include XmlTemplatable
+      end
+    end
+  end
+end

@@ -32,6 +32,10 @@ module Saml
           Saml::Kit::Response.new(to_xml, request_id: request.try(:id), configuration: configuration)
         end
 
+        def assertion=(value)
+          @assertion = value ? value : Null.new
+        end
+
         def assertion
           @assertion ||=
             begin

@@ -8,6 +8,7 @@ require 'saml/kit/builders/identity_provider_metadata'
 require 'saml/kit/builders/logout_request'
 require 'saml/kit/builders/logout_response'
 require 'saml/kit/builders/metadata'
+require 'saml/kit/builders/null'
 require 'saml/kit/builders/response'
 require 'saml/kit/builders/service_provider_metadata'
 

@@ -45,6 +45,12 @@ RSpec.describe Saml::Kit::Builders::Response do
       result = subject.build
       expect(result.status_message).to eql('Invalid message signature')
     end
+
+    it 'builds a response without an assertion' do
+      subject.assertion = nil
+      result = subject.build
+      expect(result.assertion).not_to be_present
+    end
   end
 
   describe '#to_xml' do

@@ -63,7 +63,7 @@ ControlParameter:
   - Saml::Kit::Metadata#to_xml
   - Saml::Kit::Signature#to_xml
 TooManyInstanceVariables:
-  max_instance_variables: 12
+  max_instance_variables: 15
 TooManyMethods:
   max_methods: 30
 TooManyStatements: