ruby-rails-controller-testing 1.0.4-2 (amd64 binary) in ubuntu focal

 This gem brings back assigns to your controller tests as well as
 assert_template to both controller and integration tests.
 .
 For projects and gems using controller tests outside of a Rails application,
 invoke the Rails::Controller::Testing.install method inside your test suite
 setup to include the required modules on controller test cases.