--TEST--
"filter" tag applies a filter on its children
--DEPRECATION--
The "filter" tag in "index.twig" at line 2 is deprecated since Twig 2.9, use the "apply" tag instead.
--TEMPLATE--
{% filter upper %}
Some text with a {{ var }}
{% endfilter %}
--DATA--
return ['var' => 'var']
--EXPECT--
SOME TEXT WITH A VAR
