public function testPurchaseFailure()
{
$httpResponse = $this->getMockHttpResponse('PurchaseFailure.txt');
$response = new Response($this->getMockRequest(), $httpResponse->json());
$this->assertFalse($response->isSuccessful());
$this->assertFalse($response->isRedirect());
$this->assertNull($response->getTransactionReference());
$this->assertSame('The current resource was deemed invalid.', $response->getMessage());
}