belongs_to assignment creates a new proxy rather than modifying its target in-place. Closes #8412.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6804 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 14 insertions, 1 deletions

diff --git a/activerecord/test/associations_test.rb b/activerecord/test/associations_test.rb
index 8f60fc95f1..03c344de7c 100755
--- a/activerecord/test/associations_test.rb
+++ b/activerecord/test/associations_test.rb
@@ -1039,7 +1039,20 @@ class BelongsToAssociationsTest < Test::Unit::TestCase
     citibank.firm = apple
     assert_equal apple.id, citibank.firm_id
   end
-  
+
+  def test_no_unexpected_aliasing
+    first_firm = companies(:first_firm)
+    another_firm = companies(:another_firm)
+
+    citibank = Account.create("credit_limit" => 10)
+    citibank.firm = first_firm
+    original_proxy = citibank.firm
+    citibank.firm = another_firm
+
+    assert_equal first_firm.object_id, original_proxy.object_id
+    assert_equal another_firm.object_id, citibank.firm.object_id
+  end
+
   def test_creating_the_belonging_object
     citibank = Account.create("credit_limit" => 10)
     apple    = citibank.create_firm("name" => "Apple")