public void partition() {
List<LocalDate> dates =
dates(DATE_2010_01_01, DATE_2011_06_01, DATE_2012_01_01, DATE_2013_06_01, DATE_2014_01_01);
LocalDateDoubleTimeSeries series =
LocalDateDoubleTimeSeries.builder().putAll(dates, VALUES_10_14).build();
Pair<LocalDateDoubleTimeSeries, LocalDateDoubleTimeSeries> partition =
series.partition((ld, d) -> ld.getYear() % 2 == 0);
LocalDateDoubleTimeSeries even = partition.getFirst();
LocalDateDoubleTimeSeries odd = partition.getSecond();
assertThat(even.size()).isEqualTo(3);
assertThat(odd.size()).isEqualTo(2);
assertThat(even.get(DATE_2010_01_01)).hasValue(10);
assertThat(even.get(DATE_2012_01_01)).hasValue(12);
assertThat(even.get(DATE_2014_01_01)).hasValue(14);
assertThat(odd.get(DATE_2011_06_01)).hasValue(11);
assertThat(odd.get(DATE_2013_06_01)).hasValue(13);
}
