public function testNext() {
$stream = new Twig_TokenStream(self::$tokens);
$repr = array();
while (!$stream
->isEOF()) {
$token = $stream
->next();
$repr[] = $token
->getValue();
}
$this
->assertEquals('1, 2, 3, 4, 5, 6, 7', implode(', ', $repr), '->next() advances the pointer and returns the current token');
}