### Question:
CryptoCavaWrapper { static boolean isEmpty(final byte[] data) { return IntStream.range(0, data.length).parallel().allMatch(i -> data[i] == 0); } private  CryptoCavaWrapper(); static byte[] base64Decode(byte[] base64Decoded); static byte[] hexToBin(byte[] hex); static void cryptoGenericHashBlake2b(byte[] out, byte[] in, byte[] key); static byte[] randomBytes(int length); static void cryptoSignDetached(byte[] out, byte[] msg, byte[] privateKey); static void cryptoSignEd25519SeedKeypair(byte[] seed, byte[] pkey, byte[] sk); static int cryptoSignVerifyDetached(byte[] signature, byte[] message, byte[] publicKey); static final int VARIANT_URLSAFE_NO_PADDING; }### Answer:
@Test public void emptyByteArray() { byte[] bytes = new byte[24]; assertTrue(CryptoCavaWrapper.isEmpty(bytes)); }