1 files changed, 36 insertions, 0 deletions
diff --git a/activerecord/test/cases/inclusion_test.rb b/activerecord/test/cases/inclusion_test.rb
index 297c7a9923..8f095e4953 100644
--- a/activerecord/test/cases/inclusion_test.rb
+++ b/activerecord/test/cases/inclusion_test.rb
@@ -82,6 +82,42 @@ class InclusionUnitTest < ActiveRecord::TestCase
   def test_included_twice
     @klass.send :include, ActiveRecord::Model
   end
+
+  def test_deprecation_proxy
+    proxy = ActiveRecord::Model::DeprecationProxy.new
+
+    assert_equal ActiveRecord::Model.name, proxy.name
+    assert_equal ActiveRecord::Base.superclass, assert_deprecated { proxy.superclass }
+
+    sup, sup2 = nil, nil
+    ActiveSupport.on_load(:__test_active_record_model_deprecation) do
+      sup = superclass
+      sup2 = send(:superclass)
+    end
+    assert_deprecated do
+      ActiveSupport.run_load_hooks(:__test_active_record_model_deprecation, proxy)
+    end
+    assert_equal ActiveRecord::Base.superclass, sup
+    assert_equal ActiveRecord::Base.superclass, sup2
+  end
+
+  test "including in deprecation proxy" do
+    model, base = ActiveRecord::Model.dup, ActiveRecord::Base.dup
+    proxy = ActiveRecord::Model::DeprecationProxy.new(model, base)
+
+    mod = Module.new
+    proxy.include mod
+    assert model < mod
+  end
+
+  test "extending in deprecation proxy" do
+    model, base = ActiveRecord::Model.dup, ActiveRecord::Base.dup
+    proxy = ActiveRecord::Model::DeprecationProxy.new(model, base)
+
+    mod = Module.new
+    assert_deprecated { proxy.extend mod }
+    assert base.singleton_class < mod
+  end
 end
 
 class InclusionFixturesTest < ActiveRecord::TestCase