@expectedException Twig_Error_Syntax
public function testStringExpressionDoesNotConcatenateTwoConsecutiveStrings() {
$env = new Twig_Environment(new Twig_Loader_String(), array(
'cache' => false,
'autoescape' => false,
'optimizations' => 0,
));
$stream = $env
->tokenize('{{ "a" "b" }}', 'index');
$parser = new Twig_Parser($env);
$parser
->parse($stream);
}