public function shouldConfigContainDefaultOptions()
{
$factory = new PaypalRestGatewayFactory();
$config = $factory->createConfig();
$this->assertInternalType('array', $config);
$this->assertArrayHasKey('payum.default_options', $config);
$this->assertEquals(['client_id' => '', 'client_secret' => '', 'config_path' => ''], $config['payum.default_options']);
}