1 files changed, 17 insertions, 0 deletions
diff --git a/activerecord/test/associations_test.rb b/activerecord/test/associations_test.rb
index 747d04cf3f..eecb096521 100755
--- a/activerecord/test/associations_test.rb
+++ b/activerecord/test/associations_test.rb
@@ -291,6 +291,23 @@ class HasOneAssociationsTest < Test::Unit::TestCase
     assert_equal a, firm.account
     assert_equal a, firm.account(true)
   end
+
+  def test_not_resaved_when_unchanged
+    firm = Firm.find(:first, :include => :account)
+    assert_queries(1) { firm.save! }
+
+    firm = Firm.find(:first)
+    firm.account = Account.find(:first)
+    assert_queries(1) { firm.save! }
+
+    firm = Firm.find(:first).clone
+    firm.account = Account.find(:first)
+    assert_queries(2) { firm.save! }
+
+    firm = Firm.find(:first).clone
+    firm.account = Account.find(:first).clone
+    assert_queries(2) { firm.save! }
+  end
 end