@Test
  public void testAesGcm() throws Exception {
    byte[] key = Random.randBytes(16);
    AesGcmJce gcm = new AesGcmJce(key);
    testEncryptionDecryption(gcm, 5, 128, 20);
  }
Encrypt and decrypt concurrently with one Aead cipher.
java_src/src/test/java/com/google/crypto/tink/subtle/AeadThreadSafetyTest.java