public function testCanConvertToDateIntervalWithNegativeValue()
{
/*
$expectedInterval = new \DateInterval('P1Y1M6DT14H12M6S');
object(DateInterval)[2]
public 'y' => int 1
public 'm' => int 1
public 'd' => int 7
public 'h' => int 14
public 'i' => int 12
public 's' => int 6
public 'weekday' => int 0
public 'weekday_behavior' => int 0
public 'first_last_day_of' => int 0
public 'invert' => int 1
public 'days' => int 402
public 'special_type' => int 0
public 'special_amount' => int 0
public 'have_weekday_relative' => int 0
public 'have_special_relative' => int 0
*/
$testTimeValue = new TimeValue('-34783926', 's');
$testInterval = $testTimeValue->toDateInterval();
$this->assertEquals(1, $testInterval->y, "Test Interval years not correct");
$this->assertEquals(1, $testInterval->m, "Test Interval months not correct");
$this->assertEquals(7, $testInterval->d, "Test Interval days not correct");
$this->assertEquals(14, $testInterval->h, "Test Interval hours not correct");
$this->assertEquals(12, $testInterval->i, "Test Interval minutes not correct");
$this->assertEquals(6, $testInterval->s, "Test Interval seconds not correct");
$this->assertEquals(1, $testInterval->invert, "Test Interval invert not correct");
$this->assertEquals(402, $testInterval->days, "Test Interval total full days not correct");
}
/**
* Subtract a TimeValue from $this and return a new object.
*
* @param TimeValue $time
* @return TimeValue
*/
public function sub(TimeValue $time)
{
$totalSeconds = $this->seconds - $time->getSeconds();
return new TimeValue("{$totalSeconds}", 's');
}