@Test
void firstDayOfQuarterAdjuster() {

	assertThat(QuarterUtils.firstDayOfQuarterAdjuster().adjustInto(LocalDate.of(2018, 12, 25)))
			.isEqualTo(LocalDate.of(2018, 10, 1));
	assertThat(QuarterUtils.firstDayOfQuarterAdjuster().adjustInto(LocalDateTime.of(2018, 2, 5, 5, 5)))
			.isEqualTo(LocalDateTime.of(2018, 1, 1, 5, 5));
}