Add repair_helper.rb file I forgot in previous commit 8a92cd

activerecord/test/cases/repair_helper.rb

@@ -0,0 +1,50 @@
+module ActiveRecord
+  module Testing
+    module RepairHelper
+      def self.included(base)
+        base.class_eval do
+          extend ClassMethods
+        end
+      end
+
+      module Toolbox
+        def self.record_validations(*model_classes)
+          model_classes.inject({}) do |repair, klass|
+            repair[klass] ||= {}
+            [:validate, :validate_on_create, :validate_on_update].each do |callback|
+              the_callback = klass.instance_variable_get("@#{callback.to_s}_callbacks")
+              repair[klass][callback] = (the_callback.nil? ? nil : the_callback.dup)
+            end
+            repair
+          end
+        end
+
+        def self.reset_validations(recorded)
+          recorded.each do |klass, repairs|
+            [:validate, :validate_on_create, :validate_on_update].each do |callback|
+              klass.instance_variable_set("@#{callback.to_s}_callbacks", repairs[callback])
+            end
+          end
+        end
+      end
+
+      module ClassMethods
+        def repair_validations(*model_classes)
+          setup do
+            @validation_repairs = ActiveRecord::Testing::RepairHelper::Toolbox.record_validations(*model_classes)
+          end
+          teardown do
+            ActiveRecord::Testing::RepairHelper::Toolbox.reset_validations(@validation_repairs)
+          end
+        end
+      end
+
+      def repair_validations(*model_classes, &block)
+        validation_repairs = ActiveRecord::Testing::RepairHelper::Toolbox.record_validations(*model_classes)
+        return block.call
+      ensure
+        ActiveRecord::Testing::RepairHelper::Toolbox.reset_validations(validation_repairs)
+      end
+    end
+  end
+end