public function testValidateFunction()
{
$this->assertEquals(Unit::validate('of'), true);
$this->assertEquals(Unit::validate('grams'), true);
$this->assertEquals(Unit::validate('ml'), true);
$this->assertEquals(Unit::validate('slices'), true);
$this->assertEquals(Unit::validate('tones'), false);
}
public function __construct($item, $amount, $unit, DateTime $usedBy)
{
$this->item = strval($item);
$this->amount = intval($amount);
$this->usedBy = $usedBy;
if (Unit::validate($unit)) {
$this->unit = strtolower($unit);
} else {
throw new InvalidArgumentException("Invalid unit");
}
}
