Add failing example

Author: davidlibrera

test/settings_test.rb

@@ -77,6 +77,20 @@ class SettingsTest < Minitest::Test
       assert_equal new_settings.security[:signature_method], XMLSecurity::Document::RSA_SHA1
     end
 
+    it "overrides only provided security attributes" do
+      config = {
+        security: {
+          metadata_signed: true
+        }
+      }
+
+      @default_attributes = OneLogin::RubySaml::Settings::DEFAULTS
+
+      @settings = OneLogin::RubySaml::Settings.new(config)
+      assert_equal @settings.security[:metadata_signed], true
+      assert_equal @settings.security[:digest_method], @default_attributes[:security][:digest_method]
+    end
+
     describe "#single_logout_service_url" do
       it "when single_logout_service_url is nil but assertion_consumer_logout_service_url returns its value" do
         @settings.single_logout_service_url = nil