public function setThrowsExceptionIfNoFrontEndHasBeenSet()
{
$backendOptions = ['servers' => ['localhost:11211']];
$backend = new MemcachedBackend($this->getEnvironmentConfiguration(), $backendOptions);
$data = 'Some data';
$identifier = 'MyIdentifier' . md5(uniqid(mt_rand(), true));
$backend->set($identifier, $data);
}