/**
* @dataProvider provideTestAddInterval
*
* The modification by interval MUST be aware of day light saving shifts, so one day can even be 25 or 23 hours.
*
* @param string $dateStr
* @param string $tzStr
* @param string $intervalStr
* @param string $expectedAdd
* @param string $expectedSub
*/
public function testAddSubInterval($dateStr, $tzStr, $intervalStr, $expectedAdd, $expectedSub)
{
$localDate = new LocalDate($dateStr, $tzStr);
// test with object parameter
$added = $localDate->addInterval(new \DateInterval($intervalStr));
$subbed = $localDate->subInterval(new \DateInterval($intervalStr));
$this->assertEquals($expectedAdd, $added->format(), 'Adding an interval must work');
$this->assertEquals($expectedSub, $subbed->format(), 'Subbing an interval must work');
// test with string parameter
$added = $localDate->addInterval($intervalStr);
$subbed = $localDate->subInterval($intervalStr);
$this->assertEquals($expectedAdd, $added->format(), 'Adding an interval as string must work');
$this->assertEquals($expectedSub, $subbed->format(), 'Subbing an interval as string must work');
}
