    @Test
    public void testWriteRoundTrip() throws Exception {

        Path path = Files.createTempFile("ReportGeneratorUnitTest", ".txt");
        reportGenerator.outputFile = path.toString();
        String expected = "2016-03-19T07:01:10,Long,ABC,100,100.23,0,2016-03-20T06:01:10,101.23,0,Short,XYZ,50,250.34,0,251.34,0";

        Ticker longTicker = new StockTicker("ABC");
        Ticker shortTicker = new StockTicker("XYZ");
        int longSize = 100;
        int shortSize = 50;
        double longEntryFillPrice = 100.23;
        double longExitFillPrice = 101.23;
        double shortEntryFillPrice = 250.34;
        double shortExitFillPrice = 251.34;
        ZonedDateTime entryTime = ZonedDateTime.of(2016, 3, 19, 7, 1, 10, 0, ZoneId.systemDefault());
        ZonedDateTime exitTime = ZonedDateTime.of(2016, 3, 20, 6, 1, 10, 0, ZoneId.systemDefault());

        TradeOrder longEntry = new TradeOrder("123", longTicker, longSize, TradeDirection.BUY);
        longEntry.setFilledPrice(longEntryFillPrice);
        longEntry.setOrderFilledTime(entryTime);

        TradeOrder longExit = new TradeOrder("123", longTicker, longSize, TradeDirection.SELL);
        longExit.setFilledPrice(longExitFillPrice);
        longExit.setOrderFilledTime(exitTime);

        TradeOrder shortEntry = new TradeOrder("123", shortTicker, shortSize, TradeDirection.SELL);
        shortEntry.setFilledPrice(shortEntryFillPrice);
        shortEntry.setOrderFilledTime(entryTime);

        TradeOrder shortExit = new TradeOrder("123", shortTicker, shortSize, TradeDirection.BUY);
        shortExit.setFilledPrice(shortExitFillPrice);
        shortExit.setOrderFilledTime(exitTime);

        RoundTrip roundTrip = new RoundTrip();
        roundTrip.longEntry = longEntry;
        roundTrip.longExit = longExit;
        roundTrip.shortEntry = shortEntry;
        roundTrip.shortExit = shortExit;

        System.out.println("Writing out to file: " + path);

        reportGenerator.writeRoundTripToFile(roundTrip);

        List<String> lines = Files.readAllLines(path);
        assertEquals(1, lines.size());
        assertEquals(expected, lines.get(0));

        Files.deleteIfExists(path);

    }