Payum\Paypal\ExpressCheckout\Nvp\Tests\ApiTest::throwIfReturnUrlNeitherSetToFormRequestNorToOptions PHP Method

    public function throwIfReturnUrlNeitherSetToFormRequestNorToOptions()
    {
        $api = new Api(array('username' => 'a_username', 'password' => 'a_password', 'signature' => 'a_signature', 'sandbox' => true), $this->createHttpClientMock(), $this->createHttpMessageFactory());
        $api->setExpressCheckout(array());
    }