Using Webmock to fake successful ActiveMerchant response - ruby-on-rails

Question

I'm using ActiveMerchant to integrate with Authorize.net CIM. I'm in the middle of writing up automated tests, and I've begun putting into place Webmock calls so that my tests aren't actually hitting Authorize.net each time that they run.
I've created XML files from the responses of raw request data, and for the most part, it's working well. However, when I mock up a successful response, ActiveMerchant for some reason still tells me that Response.success? is not true.
My function
if self.cim_customer_profile_id.nil?
ActiveMerchant::Billing::Base.mode = :test
customer_profile_information = {
:profile => {
:merchant_customer_id => self.customer.username.first(20),
:email => self.customer.email
}
}
gateway = ActiveMerchant::Billing::AuthorizeNetCimGateway.new(
:login => AUTHORIZE_NET_API_LOGIN_ID,
:password => AUTHORIZE_NET_API_TRANSACTION_KEY
)
response = gateway.create_customer_profile(customer_profile_information)
if response.success?
self.cim_customer_profile_id = response.authorization
else
raise StandardError, response.message
end
end
And then my stubbed response is:
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
<?xml version="1.0" encoding="utf-8"?>
<createCustomerProfileResponse xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns='AnetApi/xml/v1/schema/AnetApiSchema.xsd'>
<messages>
<resultCode>
Ok
</resultCode>
<message>
<code>
I00001
</code>
<text>
Successful.
</text>
</message>
</messages>
<customerProfileId>10793616</customerProfileId>
<customerPaymentProfileIdList/>
<customerShippingAddressIdList/>
<validationDirectResponseList/>
</createCustomerProfileResponse>
Is there any reason why ActiveMerchant won't function with a successful, stubbed, request? Or am I missing something that ActiveMerchant requires in order to register that the response is actually successful?

Answer 1

Ah, I'm so dumb. I added new lines after all of my XML tags for readability, but they're interfering with how ActiveMerchant parses and evaluates the response.
So the correct XML response mock would be:
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
<?xml version="1.0" encoding="utf-8"?>
<createCustomerProfileResponse xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns='AnetApi/xml/v1/schema/AnetApiSchema.xsd'>
<messages>
<resultCode>Ok</resultCode>
<message>
<code>I00001</code>
<text>Successful.</text>
</message>
</messages>
<customerProfileId>10793616</customerProfileId>
<customerPaymentProfileIdList/>
<customerShippingAddressIdList/>
<validationDirectResponseList/>
</createCustomerProfileResponse>