1 files changed, 22 insertions, 0 deletions
diff --git a/activerecord/test/associations_join_model_test.rb b/activerecord/test/associations_join_model_test.rb
index 5437e049a3..5c1510faff 100644
--- a/activerecord/test/associations_join_model_test.rb
+++ b/activerecord/test/associations_join_model_test.rb
@@ -56,6 +56,28 @@ class AssociationsJoinModelTest < Test::Unit::TestCase
     assert_equal "Post", tagging.taggable_type
   end
 
+  def test_set_polymorphic_has_many
+    tagging = tags(:misc).taggings.create
+    posts(:thinking).taggings << tagging
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_set_polymorphic_has_one
+    tagging = tags(:misc).taggings.create
+    posts(:thinking).tagging = tagging
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_create_polymorphic_has_many_with_scope
+    tagging = posts(:welcome).taggings.create(:tag => tags(:general))
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_create_polymorphic_has_one_with_scope
+    tagging = posts(:welcome).tagging.create(:tag => tags(:general))
+    assert_equal "Post", tagging.taggable_type
+  end
+
   def test_has_many_with_piggyback
     assert_equal "2", categories(:sti_test).authors.first.post_id.to_s
   end