public function testPurchase()
{
$order = array('body' => 'test', 'out_trade_no' => date('YmdHis'), 'total_fee' => '0.01', 'spbill_create_ip' => '114.119.110.120');
/**
* @var CreateOrderResponse $response
*/
$response = $this->gateway->purchase($order)->send();
$this->assertFalse($response->isSuccessful());
$this->assertFalse($response->isRedirect());
}