Sonata\Component\Currency\Currency::__toString PHP Method

    public function __toString()
    {
        return $this->getLabel();
    }

 public function testGettersSetters()
 {
     $currency = new Currency();
     $currency->setLabel('EUR');
     $this->assertEquals('EUR', $currency->getLabel());
     $this->assertEquals('EUR', $currency->__toString());
 }