1 files changed, 10 insertions, 4 deletions
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index dc8f25b0e7..8f83cf7cb4 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1488,15 +1488,14 @@ class BasicsTest < ActiveRecord::TestCase
     attrs = topic.attributes.dup
     attrs.delete 'id'
 
-    typecast = Class.new {
-      def type_cast_from_database value
+    typecast = Class.new(ActiveRecord::Type::Value) {
+      def type_cast value
         "t.lo"
       end
     }
 
     types = { 'author_name' => typecast.new }
-    topic = Topic.allocate.init_with 'raw_attributes' => attrs,
-                                     'column_types' => types
+    topic = Topic.instantiate(attrs, types)
 
     assert_equal 't.lo', topic.author_name
   end
@@ -1597,4 +1596,11 @@ class BasicsTest < ActiveRecord::TestCase
     assert_equal after_handler, new_handler
     assert_equal orig_handler, klass.connection_handler
   end
+
+  # Note: This is a performance optimization for Array#uniq and Hash#[] with
+  # AR::Base objects. If the future has made this irrelevant, feel free to
+  # delete this.
+  test "records without an id have unique hashes" do
+    assert_not_equal Post.new.hash, Post.new.hash
+  end
 end