}

    @Test
    public void test_getUsername() {
        assertEquals("guest", systemHelper.getUsername());
    }

    @Test
    public void test_getCurrentTimeAsLocalDateTime() {
        final long current =
                1000 * systemHelper.getCurrentTimeAsLocalDateTime().atZone(ZoneId.systemDefault()).toInstant().getEpochSecond();
        final long now = System.currentTimeMillis();