1 files changed, 50 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/testing/test_process.rb b/actionpack/lib/action_dispatch/testing/test_process.rb
new file mode 100644
index 0000000000..8ac50c730d
--- /dev/null
+++ b/actionpack/lib/action_dispatch/testing/test_process.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "action_dispatch/middleware/cookies"
+require "action_dispatch/middleware/flash"
+
+module ActionDispatch
+  module TestProcess
+    module FixtureFile
+      # Shortcut for <tt>Rack::Test::UploadedFile.new(File.join(ActionDispatch::IntegrationTest.fixture_path, path), type)</tt>:
+      #
+      #   post :change_avatar, avatar: fixture_file_upload('files/spongebob.png', 'image/png')
+      #
+      # To upload binary files on Windows, pass <tt>:binary</tt> as the last parameter.
+      # This will not affect other platforms:
+      #
+      #   post :change_avatar, avatar: fixture_file_upload('files/spongebob.png', 'image/png', :binary)
+      def fixture_file_upload(path, mime_type = nil, binary = false)
+        if self.class.respond_to?(:fixture_path) && self.class.fixture_path &&
+            !File.exist?(path)
+          path = File.join(self.class.fixture_path, path)
+        end
+        Rack::Test::UploadedFile.new(path, mime_type, binary)
+      end
+    end
+
+    include FixtureFile
+
+    def assigns(key = nil)
+      raise NoMethodError,
+        "assigns has been extracted to a gem. To continue using it,
+        add `gem 'rails-controller-testing'` to your Gemfile."
+    end
+
+    def session
+      @request.session
+    end
+
+    def flash
+      @request.flash
+    end
+
+    def cookies
+      @cookie_jar ||= Cookies::CookieJar.build(@request, @request.cookies)
+    end
+
+    def redirect_to_url
+      @response.redirect_url
+    end
+  end
+end