1 files changed, 16 insertions, 0 deletions
diff --git a/activerecord/test/cases/validations/uniqueness_validation_test.rb b/activerecord/test/cases/validations/uniqueness_validation_test.rb
index 8708117129..0f9cb10f0f 100644
--- a/activerecord/test/cases/validations/uniqueness_validation_test.rb
+++ b/activerecord/test/cases/validations/uniqueness_validation_test.rb
@@ -22,6 +22,14 @@ end
 class Thaumaturgist < IneptWizard
 end
 
+class ReplyTitle; end
+
+class ReplyWithTitleObject < Reply
+  validates_uniqueness_of :content, :scope => :title
+
+  def title; ReplyTitle.new; end
+end
+
 class UniquenessValidationTest < ActiveRecord::TestCase
   fixtures :topics, 'warehouse-things', :developers
 
@@ -80,6 +88,14 @@ class UniquenessValidationTest < ActiveRecord::TestCase
     assert r3.valid?, "Saving r3"
   end
 
+  def test_validate_uniqueness_with_composed_attribute_scope
+    r1 = ReplyWithTitleObject.create "title" => "r1", "content" => "hello world"
+    assert r1.valid?, "Saving r1"
+
+    r2 = ReplyWithTitleObject.create "title" => "r1", "content" => "hello world"
+    assert !r2.valid?, "Saving r2 first time"
+  end
+
   def test_validate_uniqueness_scoped_to_defining_class
     t = Topic.create("title" => "What, me worry?")