public function testDeleteCache()
 {
     $options = new CacheOptions();
     $options->setEnabled(true);
     $cacheManger = new CacheManager($options);
     $adapter = new \Zend\Cache\Storage\Adapter\Memory();
     $options->setAdapter($adapter);
     $adapter->addItem('stuff13', new \ArrayObject());
     $this->assertTrue($adapter->hasItem('stuff13'));
     $cacheManger->delete('stuff13');
     $this->assertFalse($adapter->hasItem('stuff13'));
 }