Accept array of attributes as arg also, like 2.3

activemodel/lib/active_model/validations.rb

@@ -137,7 +137,7 @@ module ActiveModel
 
       def _merge_attributes(attr_names)
         options = attr_names.extract_options!
-        options.merge(:attributes => attr_names)
+        options.merge(:attributes => attr_names.flatten)
       end
     end
 

activemodel/test/cases/validations/presence_validation_test.rb

@@ -10,6 +10,12 @@ require 'models/custom_reader'
 class PresenceValidationTest < ActiveModel::TestCase
   include ActiveModel::TestsDatabase
 
+  teardown do
+    Topic.reset_callbacks(:validate)
+    Person.reset_callbacks(:validate)
+    CustomReader.reset_callbacks(:validate)
+  end
+
   def test_validate_presences
     Topic.validates_presence_of(:title, :content)
 
@@ -27,17 +33,21 @@ class PresenceValidationTest < ActiveModel::TestCase
     t.content = "like stuff"
 
     assert t.save
-  ensure
-    Topic.reset_callbacks(:validate)
+  end
+
+  test 'accepts array arguments' do
+    Topic.validates_presence_of %w(title content)
+    t = Topic.new
+    assert !t.valid?
+    assert_equal ["can't be blank"], t.errors[:title]
+    assert_equal ["can't be blank"], t.errors[:content]
   end
 
   def test_validates_acceptance_of_with_custom_error_using_quotes
-    Person.validates_presence_of :karma, :message=> "This string contains 'single' and \"double\" quotes"
+    Person.validates_presence_of :karma, :message => "This string contains 'single' and \"double\" quotes"
     p = Person.new
     assert !p.valid?
     assert_equal "This string contains 'single' and \"double\" quotes", p.errors[:karma].last
-  ensure
-    Person.reset_callbacks(:validate)
   end
 
   def test_validates_presence_of_for_ruby_class
@@ -50,10 +60,8 @@ class PresenceValidationTest < ActiveModel::TestCase
 
     p.karma = "Cold"
     assert p.valid?
-  ensure
-    Person.reset_callbacks(:validate)
   end
-  
+
   def test_validates_presence_of_for_ruby_class_with_custom_reader
     CustomReader.validates_presence_of :karma
 
@@ -64,7 +72,5 @@ class PresenceValidationTest < ActiveModel::TestCase
 
     p[:karma] = "Cold"
     assert p.valid?
-  ensure
-    CustomReader.reset_callbacks(:validate)
   end
 end