1 files changed, 24 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/testing/assertions.rb b/actionpack/lib/action_dispatch/testing/assertions.rb
new file mode 100644
index 0000000000..08c2969685
--- /dev/null
+++ b/actionpack/lib/action_dispatch/testing/assertions.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require "rails-dom-testing"
+
+module ActionDispatch
+  module Assertions
+    autoload :ResponseAssertions, "action_dispatch/testing/assertions/response"
+    autoload :RoutingAssertions, "action_dispatch/testing/assertions/routing"
+
+    extend ActiveSupport::Concern
+
+    include ResponseAssertions
+    include RoutingAssertions
+    include Rails::Dom::Testing::Assertions
+
+    def html_document
+      @html_document ||= if @response.content_type.to_s.end_with?("xml")
+        Nokogiri::XML::Document.parse(@response.body)
+      else
+        Nokogiri::HTML::Document.parse(@response.body)
+      end
+    end
+  end
+end