public function testFunctions()
{
$twig = $this->getEnv();
$functionList = $twig->getFunctions();
$this->assertEquals(true, is_array($functionList));
//$this->assertArrayHasKey('links',$functionList);
//$this->assertArrayHasKey('linksFindParent',$functionList);
//$this->assertArrayHasKey('linkActivePart',$functionList);
$this->assertArrayHasKey('asset', $functionList);
$this->assertArrayHasKey('filterApply', $functionList);
$this->assertArrayHasKey('image', $functionList);
$this->assertArrayHasKey('element', $functionList);
$this->assertArrayHasKey('t', $functionList);
}