= 70000) { $this->markTestSkipped('Extension is not available on PHP 7+'); } $twig = new Environment(new ArrayLoader(['index' => '{{ d1.date }}{{ d2.date }}']), [ 'debug' => true, 'cache' => false, 'autoescape' => false, ]); $d1 = new \DateTime(); $d2 = new \DateTime(); $output = $twig->render('index', compact('d1', 'd2')); // If it fails, PHP will crash. $this->assertEquals($output, $d1->date.$d2->date); } }