1 files changed, 27 insertions, 0 deletions
diff --git a/activerecord/test/cases/serialization_test.rb b/activerecord/test/cases/serialization_test.rb
index c46060a646..3f52e80e11 100644
--- a/activerecord/test/cases/serialization_test.rb
+++ b/activerecord/test/cases/serialization_test.rb
@@ -1,8 +1,11 @@
 require "cases/helper"
 require 'models/contact'
 require 'models/topic'
+require 'models/book'
 
 class SerializationTest < ActiveRecord::TestCase
+  fixtures :books
+
   FORMATS = [ :xml, :json ]
 
   def setup
@@ -65,4 +68,28 @@ class SerializationTest < ActiveRecord::TestCase
   ensure
     ActiveRecord::Base.include_root_in_json = original_root_in_json
   end
+
+  def test_read_attribute_for_serialization_with_format_without_method_missing
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = 'books'
+
+    book = klazz.new
+    assert_nil book.read_attribute_for_serialization(:format)
+  end
+
+  def test_read_attribute_for_serialization_with_format_after_init
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = 'books'
+
+    book = klazz.new(format: 'paperback')
+    assert_equal 'paperback', book.read_attribute_for_serialization(:format)
+  end
+
+  def test_read_attribute_for_serialization_with_format_after_find
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = 'books'
+
+    book = klazz.find(books(:awdr).id)
+    assert_equal 'paperback', book.read_attribute_for_serialization(:format)
+  end
 end