require "abstract_unit" require "active_support/descendants_tracker" require "descendants_tracker_test_cases" class DescendantsTrackerWithoutAutoloadingTest < ActiveSupport::TestCase include DescendantsTrackerTestCases # Regression test for #8422. https://github.com/rails/rails/issues/8442 def test_clear_without_autoloaded_singleton_parent mark_as_autoloaded do parent_instance = Parent.new parent_instance.singleton_class.descendants ActiveSupport::DescendantsTracker.clear assert !ActiveSupport::DescendantsTracker.class_variable_get(:@@direct_descendants).key?(parent_instance.singleton_class) end end end