public function test_now()
 {
     $nowDT = ZonedDateTime::now();
     $expected = OffsetTime::nowOf(Clock::systemDefaultZone());
     $test = OffsetTime::now();
     $diff = Math::abs($test->toLocalTime()->toNanoOfDay() - $expected->toLocalTime()->toNanoOfDay());
     $this->assertTrue($diff < 100000000);
     // less than 0.1 secs
     $this->assertEquals($test->getOffset(), $nowDT->getOffset());
 }