--- /dev/null
+--TEST--
+"merge" filter
+--TEMPLATE--
+{{ items|merge({'bar': 'foo'})|join }}
+{{ items|merge({'bar': 'foo'})|keys|join }}
+{{ {'bar': 'foo'}|merge(items)|join }}
+{{ {'bar': 'foo'}|merge(items)|keys|join }}
+{{ numerics|merge([4, 5, 6])|join }}
+{{ traversable.a|merge(traversable.b)|join }}
+--DATA--
+return array('items' => array('foo' => 'bar'), 'numerics' => array(1, 2, 3), 'traversable' => array('a' => new ArrayObject(array(0 => 1, 1 => 2, 2 => 3)), 'b' => new ArrayObject(array('a' => 'b'))))
+--EXPECT--
+barfoo
+foobar
+foobar
+barfoo
+123456
+123b