private void feedData(AsyncSSLEngine from, MockSslListener fromList, AsyncSSLEngine to, MockSslListener toList) throws Exception {
		String expected = "abc";
		ByteBuffer data = ByteBuffer.allocate(10);
		helper.putString(data, expected);
		helper.doneFillingBuffer(data);
		from.feedPlainPacket(data, null);

		ByteBuffer encData = fromList.getPacketEncrypted();
		
		to.feedEncryptedPacket(encData, null);

		ByteBuffer b = toList.getAssembledUnencryptedPacket();
		String actual = helper.readString(b, b.remaining());
		assertEquals(expected, actual);			
	}