public function testTestsIfIncrementsOfRanges()
{
$f = new DayOfWeekField();
$this->assertFalse($f->isIncrementsOfRanges('1-2'));
$this->assertTrue($f->isIncrementsOfRanges('1/2'));
$this->assertTrue($f->isIncrementsOfRanges('*/2'));
$this->assertTrue($f->isIncrementsOfRanges('3-12/2'));
}