SecretKeyFactorySpi skfSpi = new MySecretKeyFactorySpi();
SecretKey sk = null;
assertNull("Not null result", skfSpi.engineTranslateKey(sk));
KeySpec kspec = null;
assertNull("Not null result", skfSpi.engineGenerateSecret(kspec));
assertNull("Not null result", skfSpi.engineGetKeySpec(sk, null));
}
}