Automatically select the customer's default card in the checkout

spec/javascripts/unit/darkswarm/controllers/checkout/payment_controller_spec.js.coffee

@@ -0,0 +1,17 @@
+describe "PaymentCtrl", ->
+  ctrl = null
+  scope = null
+  card1 = { id: 1, is_default: false }
+  card2 = { id: 3, is_default: true }
+  cards = [card1, card2]
+
+  beforeEach ->
+    module("Darkswarm")
+    angular.module('Darkswarm').value('savedCreditCards', cards)
+    inject ($controller, $rootScope) ->
+      scope = $rootScope.$new()
+      scope.secrets = {}
+      ctrl = $controller 'PaymentCtrl', {$scope: scope}
+
+  it "sets the default card id as the selected_card", ->
+    expect(scope.secrets.selected_card).toEqual card2.id