public function testAuthorizeInsufficentFunds()
 {
     $httpResponse = $this->getMockHttpResponse('AuthorizeRequestInsufficientFunds.txt');
     $response = new AuthorizeResponse($this->getMockRequest(), $httpResponse->xml());
     $this->assertFalse($response->isSuccessful());
     $this->assertSame('Insufficient Funds', $response->getMessage());
     $this->assertSame('110', $response->getResponseCode());
 }