/**
* Substract values
*/
public function testSubValues()
{
$currency = new Currency\Currency(array('currency' => 'EUR', 'locale' => 'de_AT'));
$currency->sub(100);
$this->assertEquals('-€ 100,00', $currency->toCurrency());
$currency->sub(100)->sub(100);
$this->assertEquals('-€ 300,00', $currency->toCurrency());
}
