    @Test
    public void shouldOutputISO8601TimeCorrectly() throws Exception {

        String ts = "2017-09-12T23:04:02.000Z";
        String formattedString = TimestampUtils.getISO8601StringForTime(1505257442000l);

        Assert.assertNotNull(formattedString);
        Assert.assertEquals(ts, formattedString);
    }