@Test
  public void testChaCha20Poly1305() throws Exception {
    byte[] key = Random.randBytes(32);
    Aead cipher = new ChaCha20Poly1305(key);
    testEncryptionDecryption(cipher, 5, 128, 20);
  }
Encrypt and decrypt concurrently with one Aead cipher.
java_src/src/test/java/com/google/crypto/tink/subtle/AeadThreadSafetyTest.java