Adding github ping handler (#25)

* Adding github ping handler so setting up a new webhook doesn't fail right away

* Remove unused helper

lib/txgh/handlers/github.rb

@@ -3,6 +3,7 @@ module Handlers
     module Github
       autoload :DeleteHandler,  'txgh/handlers/github/delete_handler'
       autoload :Handler,        'txgh/handlers/github/handler'
+      autoload :PingHandler,    'txgh/handlers/github/ping_handler'
       autoload :PushHandler,    'txgh/handlers/github/push_handler'
       autoload :RequestHandler, 'txgh/handlers/github/request_handler'
     end

lib/txgh/handlers/github/ping_handler.rb

@@ -0,0 +1,18 @@
+module Txgh
+  module Handlers
+    module Github
+      # Handles github's ping event, which is a test event fired whenever a new
+      # webhook is set up.
+      class PingHandler
+        include ResponseHelpers
+
+        def initialize(options = {})
+        end
+
+        def execute
+          respond_with(200, {})
+        end
+      end
+    end
+  end
+end

lib/txgh/handlers/github/request_handler.rb

@@ -14,6 +14,8 @@ def handle_request(request, logger)
                 handle_push(request, logger)
               when 'delete'
                 handle_delete(request, logger)
+              when 'ping'
+                handle_ping(request, logger)
               else
                 handle_unexpected
             end
@@ -31,6 +33,11 @@ def handle_delete(request, logger)
             new(request, logger).handle(klass)
           end
 
+          def handle_ping(request, logger)
+            klass = Txgh::Handlers::Github::PingHandler
+            new(request, logger).handle(klass)
+          end
+
           def handle_unexpected
             respond_with_error(400, 'Unexpected event type')
           end

lib/txgh/response_helpers.rb

@@ -6,10 +6,6 @@ def respond_with(status, body, e = nil)
       Txgh::Handlers::Response.new(status, body, e)
     end
 
-    def respond_with_success(status, body)
-      respond_with(status, data(body))
-    end
-
     def respond_with_error(status, message, e = nil)
       respond_with(status, error(message), e)
     end

spec/handlers/github/ping_handler_spec.rb

@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+include Txgh
+include Txgh::Handlers::Github
+
+describe PingHandler do
+  let(:handler) do
+    PingHandler.new
+  end
+
+  it 'responds with a 200 success' do
+    response = handler.execute
+    expect(response.status).to eq(200)
+    expect(response.body).to eq({})
+  end
+end