Fix build. It seems that the Mocha's behavior were changed.

activerecord/test/cases/autosave_association_test.rb

@@ -615,7 +615,9 @@ def test_should_skip_validation_on_a_child_association_if_marked_for_destruction
   def test_a_child_marked_for_destruction_should_not_be_destroyed_twice
     @pirate.ship.mark_for_destruction
     assert @pirate.save
-    @pirate.ship.expects(:destroy).never
+    class << @pirate.ship
+      def destroy; raise "Should not be called" end
+    end
     assert @pirate.save
   end
 
@@ -660,7 +662,9 @@ def test_should_skip_validation_on_a_parent_association_if_marked_for_destructio
   def test_a_parent_marked_for_destruction_should_not_be_destroyed_twice
     @ship.pirate.mark_for_destruction
     assert @ship.save
-    @ship.pirate.expects(:destroy).never
+    class << @ship.pirate
+      def destroy; raise "Should not be called" end
+    end
     assert @ship.save
   end