public function testTwigExtensions()
{
$this->markTestIncomplete('Update required');
$app = $this->getApp();
$app['logger.system'] = new Mock\Logger();
$app['extensions']->register(new Mock\ExtensionWithTwig($app));
$log = $app['logger.system']->lastLog();
// Temporarily Disabled, need to investigate why this now fails.
//$this->assertContains('[EXT] Twig function registration failed', $log);
//$this->assertContains('instance of Bolt\Tests\Extensions\Mock\BadTwigExtension given', $log);
}