public function testDeepArray()
{
$strNode = new String_('Foo');
$stmts = array(array(array($strNode)));
$visitor = $this->getMockBuilder('PhpParser\\NodeVisitor')->getMock();
$visitor->expects($this->at(1))->method('enterNode')->with($strNode);
$traverser = new NodeTraverser();
$traverser->addVisitor($visitor);
$this->assertEquals($stmts, $traverser->traverse($stmts));
}