billing: fix integration test

This actually required three little fixes:
* couchrest_session_store updated to 0.1.2 to make sure we store sessions
* use BraintreeTestApp to proxy braintree requests that RackTest assumes
  are local
* do not attempt to read status after a capybara request

Also refactored the test a bit to set @user and login during setup.

3 files changed, 61 insertions, 17 deletions

diff --git a/billing/config/initializers/braintree.rb b/billing/config/initializers/braintree.rb
index ee21088..523dbce 100644
--- a/billing/config/initializers/braintree.rb
+++ b/billing/config/initializers/braintree.rb
@@ -1,5 +1,11 @@
+require 'braintree_test_app'
+
 Braintree::Configuration.logger = Logger.new('log/braintree.log')
 Braintree::Configuration.environment = :sandbox
 Braintree::Configuration.merchant_id = "bwrdyczvjspmxjhb"
 Braintree::Configuration.public_key = "jmw58nbmjg84prbp"
 Braintree::Configuration.private_key = "SET_ME"
+
+if Rails.env.test?
+  Rails.application.config.middleware.use BraintreeTestApp
+end
diff --git a/billing/lib/braintree_test_app.rb b/billing/lib/braintree_test_app.rb
new file mode 100644
index 0000000..41c327d
--- /dev/null
+++ b/billing/lib/braintree_test_app.rb
@@ -0,0 +1,36 @@
+# RackTest assumes all requests to be local.
+# Braintree requests need to go out to a different server though.
+# So we use a middleware to catch these and send them out again.
+
+class BraintreeTestApp
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    @env = env
+    config = Braintree::Configuration.instantiate
+    if request.path =~ /\/merchants\/#{config.merchant_id}\/transparent_redirect_requests$/
+      #proxy post to braintree
+      uri = URI.parse(config.protocol + "://" + config.server + ":" +
+        config.port.to_s + request.path)
+      http = Net::HTTP.new(uri.host, uri.port)
+      res = http.post(uri.path, request.body.read)
+
+      if res.code == "303"
+        header_hash = res.header.to_hash
+        header_hash["location"].first.gsub!("http://localhost:3000/", "http://www.example.com/")
+        [303, {"location" => header_hash["location"].first}, ""]
+      else
+        raise "unexpected response from Braintree: expected a 303"
+      end
+    else
+      @app.call(env)
+    end
+  end
+
+  def request
+    @request = Rack::Request.new(@env)
+  end
+end
+
diff --git a/billing/test/integration/customer_creation_test.rb b/billing/test/integration/customer_creation_test.rb
index 50116db..3ab2e4f 100644
--- a/billing/test/integration/customer_creation_test.rb
+++ b/billing/test/integration/customer_creation_test.rb
@@ -8,17 +8,32 @@ class CustomerCreationTest < ActionDispatch::IntegrationTest
 
   setup do
     Warden.test_mode!
+    @user = FactoryGirl.create(:user)
+    login_as @user
   end
 
   teardown do
     Warden.test_reset!
   end
 
+  # Let's test both steps together with capybara
+  #
+  # This test is nice and clean but also a bit fragil:
+  # RackTest assumes all requests to be local. So we need
+  # BraintreeTestApp for the braintree transparent redirect to work.
+  test "create customer with braintree" do
+    visit '/customer/new'
+    assert_difference("Customer.count") do
+      click_button 'Save Payment Info'
+    end
+
+    assert customer = Customer.find_by_user_id(@user.id)
+    assert customer.braintree_customer
+  end
+
   # We only test the confirmation here.
-  # The first request to Braintree is triggered outside of rails
+  # The request to Braintree is triggered outside of rails
   test "successfully confirms customer creation" do
-    user = FactoryGirl.create(:user)
-    login_as user
     response = post_transparent_redirect :create_customer_data,
       customer: FactoryGirl.attributes_for(:braintree_customer),
       redirect_url: confirm_customer_url
@@ -28,20 +43,7 @@ class CustomerCreationTest < ActionDispatch::IntegrationTest
     end
 
     assert_equal 200, status
-    assert customer = Customer.find_by_user_id(user.id)
-    assert customer.braintree_customer
-  end
-
-  # let's test both steps together with capybara
-  test "create customer with braintree" do
-    user = FactoryGirl.create(:user)
-    login_as user
-    visit '/customer/new'
-    assert_difference("Customer.count") do
-      click_button 'Save Payment Info'
-    end
-    assert_equal 200, status
-    assert customer = Customer.find_by_user_id(user.id)
+    assert customer = Customer.find_by_user_id(@user.id)
     assert customer.braintree_customer
   end