public function testComparisons() { $this->doTestComparisons([Duration::ofDays(-1), Duration::ofHours(-2), Duration::ofHours(-1), Duration::ofMinutes(-2), Duration::ofMinutes(-1), Duration::ofSeconds(-2), Duration::ofSeconds(-1), Duration::zero(), Duration::ofSeconds(1), Duration::ofSeconds(2), Duration::ofMinutes(1), Duration::ofMinutes(2), Duration::ofHours(1), Duration::ofHours(2), Duration::ofDays(1)]); }