public function testAbs()
{
$this->assertTrue(CMathi::abs(-1234) === 1234);
$this->assertTrue(CMathi::abs(5678) === 5678);
$this->assertTrue(CMathi::abs(-1234.01) === 1234);
$this->assertTrue(CMathi::abs(5678.01) === 5678);
}
protected static function shiftTimeInTimeZone(CTime $time, $timeUnit, $quantity, $timeZone)
{
$units;
switch ($timeUnit) {
case self::SECOND:
$units = "seconds";
break;
case self::MINUTE:
$units = "minutes";
break;
case self::HOUR:
$units = "hours";
break;
case self::DAY:
$units = "days";
break;
case self::WEEK:
$units = "weeks";
break;
case self::MONTH:
$units = "months";
break;
case self::YEAR:
$units = "years";
break;
default:
assert('false', vs(isset($this), get_defined_vars()));
break;
}
$dt = new DateTime();
$dt->setTimestamp($time->UTime());
$dt->setTimezone(is_cstring($timeZone) ? new DateTimeZone($timeZone) : $timeZone->DTimeZone());
$sign = $quantity < 0 ? "-" : "+";
$absQty = CString::fromInt(CMathi::abs($quantity));
$dt->modify("{$sign}{$absQty} {$units}");
$UTime = $dt->getTimestamp();
$MTime = $time->MTime();
if ($UTime != 0 && $MTime != 0 && CMathi::sign($UTime) != CMathi::sign($MTime)) {
if ($UTime < 0) {
// $MTime > 0
$UTime++;
$MTime -= 1000;
} else {
// $MTime < 0
$UTime--;
$MTime += 1000;
}
}
return new self($UTime, $MTime);
}
