Only support BAN requests on purpose, to be able to invalidate cache for a collection of Location/Content objects.
Inheritance: implements eZ\Publish\Core\MVC\Symfony\Cache\PurgeClientInterface
 public function testPurgeAll()
 {
     $this->cacheManager->expects($this->once())->method('invalidate')->with(array('X-Location-Id' => '.*'));
     $this->purgeClient->purgeAll();
 }