1 files changed, 20 insertions, 0 deletions
diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index ac95bac4ad..74571d923a 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -62,6 +62,16 @@ class DirtyTest < ActiveRecord::TestCase
     assert_equal parrot.name_change, parrot.title_change
   end
 
+  def test_reset_attribute!
+    pirate = Pirate.create!(:catchphrase => 'Yar!')
+    pirate.catchphrase = 'Ahoy!'
+
+    pirate.reset_catchphrase!
+    assert_equal "Yar!", pirate.catchphrase
+    assert_equal Hash.new, pirate.changes
+    assert !pirate.catchphrase_changed?
+  end
+
   def test_nullable_number_not_marked_as_changed_if_new_value_is_blank
     pirate = Pirate.new
 
@@ -288,6 +298,16 @@ class DirtyTest < ActiveRecord::TestCase
     end
   end
 
+  def test_save_should_not_save_serialized_attribute_with_partial_updates_if_not_present
+    with_partial_updates(Topic) do
+      Topic.create!(:author_name => 'Bill', :content => {:a => "a"})
+      topic = Topic.first(:select => 'id, author_name')
+      topic.update_attribute :author_name, 'John'
+      topic = Topic.first
+      assert_not_nil topic.content
+    end
+  end
+
   private
     def with_partial_updates(klass, on = true)
       old = klass.partial_updates?