public function testOffAllHndlers() { $rawTitle = 'Hello world!!! '; $this->filters->on('before_output_title', 'trim'); $this->filters->off('before_output_title'); $title = $this->filters->filter('before_output_title', $rawTitle); self::assertEquals($rawTitle, $title); self::assertCount(0, $this->filters->getListeners()); }