public function setUp()
 {
     parent::setUp();
     $this->stegoKey = new RandomKey($this->secretKey);
     $this->secretLsb = new SecretLsb();
     $this->secretLsb->setStegoKey($this->stegoKey);
 }
 public function setUp()
 {
     parent::setUp();
     $this->pureLsb = new PureLsb();
 }