testBasicOperations() {
    const sha512 = new Sha512();
    hashTester.runBasicTests(sha512);

    const sha384 = new Sha384();
    hashTester.runBasicTests(sha384);

    const sha256 = new Sha512_256();
    hashTester.runBasicTests(sha256);
  }
Simple sanity tests for hash functions.