add spec for deleting the default card

app/controllers/spree/credit_cards_controller.rb

@@ -47,6 +47,7 @@ module Spree
 
       # Using try because we may not have a card here
       if @credit_card.try(:destroy)
+        remove_shop_authorizations if @credit_card.is_default
         flash[:success] = I18n.t(:card_has_been_removed, number: "x-#{@credit_card.last_digits}")
       else
         flash[:error] = I18n.t(:card_could_not_be_removed)

spec/controllers/spree/credit_cards_controller_spec.rb

@@ -188,6 +188,26 @@ describe Spree::CreditCardsController, type: :controller do
             expect(flash[:success]).to eq I18n.t(:card_has_been_removed, number: "x-#{card.last_digits}")
             expect(response).to redirect_to spree.account_path(anchor: 'cards')
           end
+
+          context "the card is the default card and there are existing authorizations for the user" do
+            before do
+              card.update_attribute(:is_default, true)
+            end
+            let!(:customer1) { create(:customer, allow_charges: true) }
+            let!(:customer2) { create(:customer, allow_charges: true) }
+
+            it "removes the authorizations" do
+              customer1.user = card.user
+              customer2.user = card.user
+              customer1.save
+              customer2.save
+              expect(customer1.reload.allow_charges).to be true
+              expect(customer2.reload.allow_charges).to be true
+              spree_delete :destroy, params
+              expect(customer1.reload.allow_charges).to be false
+              expect(customer2.reload.allow_charges).to be false
+            end
+          end
         end
       end
     end