    @Test
    public void should_not_join_ranges() throws Exception {

        List<Range> ranges = asList(
                range(from(2017, Calendar.JANUARY, 1), from(2017, Calendar.JANUARY, 4)),
                range(from(2017, Calendar.JANUARY, 6), from(2017, Calendar.JANUARY, 9))
        );

        assertEquals(ranges.size(), 2);
        List<Range> result = RangeOverlapMerger.join(ranges);
        assertEquals(result.size(), 2);
    }