1 files changed, 36 insertions, 0 deletions
diff --git a/activesupport/test/descendants_tracker_with_autoloading_test.rb b/activesupport/test/descendants_tracker_with_autoloading_test.rb
new file mode 100644
index 0000000000..d4fedb5a67
--- /dev/null
+++ b/activesupport/test/descendants_tracker_with_autoloading_test.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+require "active_support/descendants_tracker"
+require "active_support/dependencies"
+require "descendants_tracker_test_cases"
+
+class DescendantsTrackerWithAutoloadingTest < ActiveSupport::TestCase
+  include DescendantsTrackerTestCases
+
+  def test_clear_with_autoloaded_parent_children_and_grandchildren
+    mark_as_autoloaded(*ALL) do
+      ActiveSupport::DescendantsTracker.clear
+      ALL.each do |k|
+        assert_empty ActiveSupport::DescendantsTracker.descendants(k)
+      end
+    end
+  end
+
+  def test_clear_with_autoloaded_children_and_grandchildren
+    mark_as_autoloaded Child1, Grandchild1, Grandchild2 do
+      ActiveSupport::DescendantsTracker.clear
+      assert_equal_sets [Child2], Parent.descendants
+      assert_equal_sets [], Child2.descendants
+    end
+  end
+
+  def test_clear_with_autoloaded_grandchildren
+    mark_as_autoloaded Grandchild1, Grandchild2 do
+      ActiveSupport::DescendantsTracker.clear
+      assert_equal_sets [Child1, Child2], Parent.descendants
+      assert_equal_sets [], Child1.descendants
+      assert_equal_sets [], Child2.descendants
+    end
+  end
+end