@Before
  public void startup() throws NoSuchAlgorithmException {
    random = SecureRandom.getInstanceStrong();
    random.setSeed(1234);
    random.nextBytes(randomBytes);
    random.nextBytes(moreRandomBytes);

    for (int i = 0; i < randomBytes.length; i++) {
      correlatedRandomBytes[i] = randomBytes[i];
      randomIndices.add(i);
    }
    Collections.shuffle(randomIndices);
  }
Tests some of the more complex functions from TestUtil.
java_src/src/test/java/com/google/crypto/tink/testing/TestUtilTest.java