public function testIndex()
{
$first = Token::identifier('hello');
$second = Token::identifier('world');
$not_found = Token::identifier('notfound');
$collection = new NodeCollection([$first, $second], FALSE);
$this->assertEquals(0, $collection->indexOf(Filter::is($first)));
$this->assertEquals(1, $collection->indexOf(Filter::is($second)));
$this->assertEquals(-1, $collection->indexOf(Filter::is($not_found)));
}
