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-rw-r--r--activerecord/test/cases/associations/has_many_through_associations_test.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index 25118b26f5..3b3d4037b9 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -46,6 +46,11 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
Reader.create person_id: 0, post_id: 0
end
+ def test_marshal_dump
+ preloaded = Post.includes(:first_blue_tags).first
+ assert_equal preloaded, Marshal.load(Marshal.dump(preloaded))
+ end
+
def test_preload_sti_rhs_class
developers = Developer.includes(:firms).all.to_a
assert_no_queries do