testing Iridium gateway and active merchant with Rspec

Recently I rewrote the billing section of a website. The site uses Iridium as the gateway.
I thought people might be interested in seeing how I spec'd this:

      context "iridium" do
        before do
          BillingDetail.gateway = 
            ActiveMerchant::Billing::IridiumGateway.new(
                       :login => "Casdasdasd",
                       :password => "asdasdasd",
                       :enable_3d_secure => true)
        end
        
        it "should work" do
          bd = Factory.build(:unsaved_billing_detail)

          bd.should_receive(:ready!)

          credit_card = Factory.build(:iridium_good_no_3ds)
          address = Factory.build(:iridium_good_no_3ds_address)
          bd.address = address

          bd.authorize(100, credit_card)
        end

        it "should fail" do
          bd = Factory.build(:unsaved_billing_detail)

          bd.should_receive(:fail!)

          credit_card = Factory.build(:iridium_card_declined)
          address = Factory.build(:iridium_card_declined_address)
          bd.address = address

          lambda {
            bd.authorize(100, credit_card)
            }.should raise_error(TGR::GatewayError)
        end
      end

I use FactoryGirl, so I set up some factories:

Factory.define :iridium_good_no_3ds, :class => ActiveMerchant::Billing::CreditCard do |cc|
  cc.number "4976000000003436"
  cc.last_name "Watson"
  cc.first_name "John"
  cc.verification_value "452"
  cc.month "12"
  cc.year "2012"
end

Factory.define :iridium_good_no_3ds_address, :class => Address do |address|
  address.last_name "Watson"
  address.first_name "John"
  address.address_1 "32 Edward Street"
  address.city "Camborne"
  address.state "Cornwall"
  address.zipcode "TR14 8PA"
  address.country "GB"
end


Factory.define :iridium_card_declined, :class => ActiveMerchant::Billing::CreditCard do |cc|
  cc.number "4921810000009076"
  cc.last_name "Lewis"
  cc.first_name "Jack"
  cc.verification_value "875"
  cc.month "12"
  cc.year "2012"
end

Factory.define :iridium_card_declined_address, :class => Address do |address|
  address.last_name "Lewis"
  address.first_name "Jack"
  address.address_1 "4 Wing Road"
  address.city "Leighton Buzzard"
  address.state "Bedfordshire"
  address.zipcode "LU7 0JB"
  address.country "GB"
end

This seems to work a treat. I can do all my other tests using the bogus gateway, but to make sure I am actually providing the right info for Iridium this context, with its before block to set the right gateway, does the job nicely!