Merge pull request rails#1929 from sobrinho/master

Create a test case for disable_referential_integrity

activerecord/test/cases/adapter_test.rb

@@ -146,4 +146,18 @@ def test_foreign_key_violations_are_translated_to_specific_exception
       end
     end
   end
+
+  def test_disable_referential_integrity
+    assert_nothing_raised do
+      @connection.disable_referential_integrity do
+        # Oracle adapter uses prefetched primary key values from sequence and passes them to connection adapter insert method
+        if @connection.prefetch_primary_key?
+          id_value = @connection.next_sequence_value(@connection.default_sequence_name("fk_test_has_fk", "id"))
+          @connection.execute "INSERT INTO fk_test_has_fk (id, fk_id) VALUES (#{id_value},0)"
+        else
+          @connection.execute "INSERT INTO fk_test_has_fk (fk_id) VALUES (0)"
+        end
+      end
+    end
+  end
 end