public function shouldConfigContainDefaultOptions()
{
$factory = new PaypalMasspayGatewayFactory();
$config = $factory->createConfig();
$this->assertInternalType('array', $config);
$this->assertArrayHasKey('payum.default_options', $config);
$this->assertEquals(array('username' => '', 'password' => '', 'signature' => '', 'sandbox' => true), $config['payum.default_options']);
}