Add Braintree::Subscription.update

README.md

@@ -17,6 +17,7 @@ Currently in alpha (i.e. it does not support every Braintree call).
 ### Subscription
 * `Braintree::Subscription.find`
 * `Braintree::Subscription.create`
+* `Braintree::Subscription.update`
 
 ### CreditCard
 * `Braintree::CreditCard.find`

lib/fake_braintree/sinatra_app.rb

@@ -50,6 +50,13 @@ class SinatraApp < Sinatra::Base
       end
     end
 
+    # Braintree::Subscription.update
+    put "/merchants/:merchant_id/subscriptions/:id" do
+      subscription_hash = Hash.from_xml(request.body).delete("subscription")
+      options = {:id => params[:id], :merchant_id => params[:merchant_id]}
+      Subscription.new(subscription_hash, options).update
+    end
+
     # Braintree::CreditCard.find
     get "/merchants/:merchant_id/payment_methods/:credit_card_token" do
       credit_card = FakeBraintree.credit_card_from_token(params[:credit_card_token])

lib/fake_braintree/subscription.rb

@@ -13,6 +13,13 @@ def create
       gzipped_response(201, hash.to_xml(:root => 'subscription'))
     end
 
+    def update
+      if existing_subscription_hash
+        hash = update_existing_subscription!
+        gzipped_response(200, hash.to_xml(:root => 'subscription'))
+      end
+    end
+
     def subscription_hash
       subscription_hash = @subscription_hash.dup
       subscription_hash["id"]                   ||= subscription_id
@@ -29,6 +36,15 @@ def subscription_hash
 
     private
 
+    def existing_subscription_hash
+      @subscription_hash['id'] && FakeBraintree.subscriptions[@subscription_hash["id"]]
+    end
+
+    def update_existing_subscription!
+      new_hash = existing_subscription_hash.merge(subscription_hash)
+      FakeBraintree.subscriptions[@subscription_hash['id']] = new_hash
+    end
+
     def braintree_formatted_date(date)
       date.strftime('%Y-%m-%d')
     end

spec/fake_braintree/subscription_spec.rb

@@ -52,3 +52,13 @@
   let(:subscription_id) { Braintree::Subscription.create(:payment_method_token => payment_method_token,
                                                          :plan_id => plan_id).subscription.id }
 end
+
+describe "Braintree::Subscription.update" do
+  it "can update a subscription" do
+    Braintree::Subscription.update(subscription_id, :plan_id => 'a_new_plan')
+    Braintree::Subscription.find(subscription_id).plan_id.should == 'a_new_plan'
+  end
+
+  let(:subscription_id) { subscription.subscription.id }
+  let(:subscription)    { create_subscription }
+end