Use lowercased cc_type in CreditCard service

spec/javascripts/unit/darkswarm/services/credit_card_spec.js.coffee

@@ -0,0 +1,31 @@
+describe 'CreditCard service', ->
+  CreditCard = null
+
+  beforeEach ->
+    module 'Darkswarm'
+    module ($provide)->
+      $provide.value "savedCreditCards", []
+      $provide.value "railsFlash", null
+      null
+
+    inject (_CreditCard_)->
+      CreditCard = _CreditCard_
+
+  describe "process_params", ->
+    beforeEach ->
+      CreditCard.secrets =
+        card:
+          exp_month: "12"
+          exp_year: "2030"
+          last4: "1234"
+        cc_type: 'mastercard'
+        token: "token123"
+
+    it "uses cc_type, rather than fetching the brand from the card", ->
+      # This is important for processing the card with activemerchant
+      process_params = CreditCard.process_params()
+      expect(process_params['exp_month']).toEqual "12"
+      expect(process_params['exp_year']).toEqual "2030"
+      expect(process_params['last4']).toEqual "1234"
+      expect(process_params['token']).toEqual "token123"
+      expect(process_params['cc_type']).toEqual "mastercard"