1--TEST-- 2"extends" tag 3--TEMPLATE-- 4{% extends "layout.twig" %}{% block content %}{{ parent() }}index {% endblock %} 5--TEMPLATE(layout.twig)-- 6{% extends "base.twig" %}{% block content %}{{ parent() }}layout {% endblock %} 7--TEMPLATE(base.twig)-- 8{% block content %}base {% endblock %} 9--DATA-- 10return [] 11--EXPECT-- 12base layout index 13