before:
	@Test
	public void transactionWithLeadingGarbage() throws Exception {
		final List<LogLine> logLines = new ArrayList<LogLine>();
		logLines.add(ReceivedLine.withPayload("received0"));
		logLines.add(ReceivedLine.withPayload("received1"));
		logLines.add(SentLine.withPayload("request"));
		logLines.add(ReceivedLine.withPayload("received2"));
		logLines.add(ReceivedLine.withPayload("received3"));
		logLines.add(ReceivedLine.withPayload("received4"));

		TransactionExtractor extract = new TransactionExtractor();
		Iterable<Transaction> transactions = extract.transactionsIn(logLines);

		assertEquals(1, IterableUtil.sizeOf(transactions));
		final Transaction extracted = IterableUtil.getAt(0, transactions);
		assertEquals(3, IterableUtil.sizeOf(extracted.response()));
	}

after:
	@Test
	public void transactionWithLeadingGarbage() throws Exception {
		final LogLineBuilder log = new LogLineBuilder();
		log.addReceivedLines(2);
		log.addSentLine();
		log.addReceivedLines(3);

		final Iterable<Transaction> transactions = extractTransactionsFrom(log);

		assertEquals(1, from(transactions).getSize());
		assertEquals(3, from(firstOf(transactions).response()).getSize());
	}