1 files changed, 14 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
index f9149c1819..0af7cbf74f 100644
--- a/activerecord/test/cases/adapter_test.rb
+++ b/activerecord/test/cases/adapter_test.rb
@@ -1,4 +1,5 @@
 require "cases/helper"
+require "models/book"
 
 module ActiveRecord
   class AdapterTest < ActiveRecord::TestCase
@@ -6,6 +7,19 @@ module ActiveRecord
       @connection = ActiveRecord::Base.connection
     end
 
+    ##
+    # PostgreSQL does not support null bytes in strings
+    unless current_adapter?(:PostgreSQLAdapter)
+      def test_update_prepared_statement
+        b = Book.create(name: "my \x00 book")
+        b.reload
+        assert_equal "my \x00 book", b.name
+        b.update_attributes(name: "my other \x00 book")
+        b.reload
+        assert_equal "my other \x00 book", b.name
+      end
+    end
+
     def test_tables
       tables = @connection.tables
       assert tables.include?("accounts")