/**
* @expectedException Braintree\Exception\Configuration
* @expectedExceptionMessage needs to be set (or accessToken needs to be passed to Braintree\Gateway).
*/
public function testConfigGetsAssertedValid()
{
Braintree\Configuration::environment('development');
//Braintree\Configuration::merchantId('integration_merchant_id');
Braintree\Configuration::publicKey('integration_public_key');
Braintree\Configuration::privateKey('integration_private_key');
$gateway = new Braintree\Gateway(Braintree\Configuration::$global);
$gateway->addOn();
}