public function testOrderSuccess()
{
$this->setMockHttpResponse('ExpressOrderSuccess.txt');
$response = $this->gateway->order($this->options)->send();
$this->assertInstanceOf('\\Omnipay\\PayPal\\Message\\ExpressInContextAuthorizeResponse', $response);
$this->assertFalse($response->isPending());
$this->assertFalse($response->isSuccessful());
$this->assertTrue($response->isRedirect());
$this->assertEquals('https://www.paypal.com/checkoutnow?useraction=commit&token=EC-42721413K79637829', $response->getRedirectUrl());
}