public function testSetValueMultipleConvertsToCurrencyInstance()
 {
     $element = new SelectCurrency('myName');
     $element->setAttribute('multiple', true);
     $element->setValue(array('GBP', 'ZAR', 'USD'));
     $value = $element->getValue();
     $this->assertInternalType('array', $value);
     $this->assertContainsOnlyInstancesOf('NetglueMoney\\Money\\Currency', $value);
     $element->setValue('GBP');
     $value = $element->getValue();
     $this->assertInternalType('array', $value);
     $this->assertContainsOnlyInstancesOf('NetglueMoney\\Money\\Currency', $value);
     $input = new \ArrayObject(array('GBP', 'USD'));
     $element->setValue($input);
     $value = $element->getValue();
     $this->assertInternalType('array', $value);
     $this->assertContainsOnlyInstancesOf('NetglueMoney\\Money\\Currency', $value);
     $element->setValue(NULL);
     $this->assertSame(array(), $element->getValue());
 }