@Test
  public void throwsIfBufferUpdatedWithLessThat213Bytes() {
    for (int i = 0; i < 212; i++) {
      messageDigest.update((byte) 0);
    }
    assertThatThrownBy(() -> messageDigest.digest()).isInstanceOf(IllegalStateException.class);
  }
Test vectors adapted from
https://github.com/keep-network/blake2b/blob/master/compression/f_test.go
crypto/algorithms/src/test/java/org/hyperledger/besu/crypto/Blake2bfMessageDigestTest.java