/**
* Creates a unique key that can be used to retrieve the file from the storage backend.
*
* @ORM\PrePersist()
*
* @return $this
*/
public function createKey()
{
/**
* The associated file has a unique key that can be used to retrieve the key from the backend storage.
*/
$this->key = sprintf('%s/%s.%s', $this->path, UniqueStringUtil::shortHash(), $this->extension);
return $this;
}
/**
* Test that binary string with length of 20 is returned.
*/
public function testLongHash()
{
$hash = UniqueStringUtil::longHash();
$this->assertTrue(is_int(bindec($hash)));
$this->assertTrue(strlen($hash) === 20);
}