Method answer

test/BaseTestSecureRpcHelper.java:161–169

(final InvocationOnMock invocation)

    when(sasl_client.unwrap(any(byte[].class), anyInt(), anyInt()))
      .thenAnswer(new Answer<byte[]>() {
        @Override
        public byte[] answer(final InvocationOnMock invocation)
            throws Throwable {
          final byte[] buffer = (byte[])invocation.getArguments()[0];
          final int length = (Integer)invocation.getArguments()[2];
          final byte[] unwrapped = new byte[length - 4];
          System.arraycopy(buffer, 4, unwrapped, 0, length - 4);
          return unwrapped;
        }
    });
  }