@BeforeClass
  public static void setUp() throws Exception {
    KmsClients.add(new FakeKmsClient());
    AeadConfig.register();
    AesGcmSivProtoSerialization.register();
  }
Tests for {@code KmsEnvelopeAead} and {@code KmsEnvelopeAeadKeyManager}.
java_src/src/test/java/com/google/crypto/tink/aead/KmsEnvelopeAeadKeyManagerTest.java