--TEST--
Twig outputs 0 nodes correctly
--TEMPLATE--
{{ empty|trim ? 'KO' : 'ok' }}
{{ spaces|trim ? 'KO' : 'ok' }}
{% if empty %}KO{% else %}ok{% endif %}

{% if spaces|trim %}KO{% else %}ok{% endif %}

{% set bar %}    {% endset %}{{ bar|trim ? 'KO' : 'ok' }}
{% if bar|trim and bar|trim %}KO{% else %}ok{% endif %}{{- "\n" -}}
{% if bar|trim or empty|trim %}KO{% else %}ok{% endif %}{{- "\n" -}}
{% if bar|trim xor empty|trim %}KO{% else %}ok{% endif %}{{- "\n" -}}
{% if not bar|trim %}ok{% else %}KO{% endif %}{{- "\n" -}}
{{ bar|trim ?: 'ok' }}
{{ (bar|trim and bar|trim) ? 'KO' : 'ok' }}
{{ (bar|trim and bar|trim) ?: 'ok' }}
{{ (bar|trim and bar|trim) ?: (bar|trim ?: 'ok') }}
--DATA--
return ['spaces' => new Twig\Markup('    ', 'UTF-8'), 'empty' => new Twig\Markup('', 'UTF-8')]
--EXPECT--
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok