Walkthrough 6-1: Rendering XML and JSON

app/controllers/hotels_controller.rb

@@ -1,9 +1,10 @@
 class HotelsController < ApplicationController
+  respond_to :html, :xml, :json
 
   before_filter :load_hotel, :except => [:new, :index, :create]
 
   def index
-    @hotels = Hotel.order('name')
+    respond_with(@hotels = Hotel.order('name'))
   end
 
   def show

spec/integration/hotels_spec.rb

@@ -1,50 +1,79 @@
 require 'spec_helper'
 
 describe "hotels" do
+  before do
+    @hotel1 = Factory.create(
+      :hotel, 
+      :name => "The Lakes"
+    )
+    @hotel2 = Factory.create(
+      :hotel, 
+      :name => "St. Clair Hotel"
+    )
+  end
+
   describe "listing hotels" do
-    before do
-      @hotel1 = Factory.create(
-        :hotel, 
-        :name => "The Lakes"
-      )
-      @hotel2 = Factory.create(
-        :hotel, 
-        :name => "St. Clair Hotel"
-      )
-      visit "/hotels"
-    end
+    describe "when format is html" do
+      before do
+        visit "/hotels"
+      end
 
-    it "should list as many hotels as we have" do
-      page.all('ul li').should have(2).hotels
-    end
+      it "should list as many hotels as we have" do
+        page.all('ul li').should have(2).hotels
+      end
+
+      it "should list all hotel names (xpath)" do
+        page.should have_xpath(
+          "//li[.='#{@hotel1.name}']"
+        )
+        page.should have_xpath(
+          "//li[.='#{@hotel2.name}']"
+        )
+      end
+
+      it "should list all hotel names (css)" do
+        hotel_names = page.all('ul li').map(&:text)
+        hotel_names.should include(@hotel1.name)
+        hotel_names.should include(@hotel2.name)
+      end
+
+      describe "when clicking on a link" do
+        before do
+          click_link(@hotel1.name)
+        end
+
+        it "should show detailed information for our hotel" do
+          page.should have_xpath(
+            "//h1[.='#{@hotel1.name}']"
+          )
+        end
+      end
 
-    it "should list all hotel names (xpath)" do
-      page.should have_xpath(
-        "//li[.='#{@hotel1.name}']"
-      )
-      page.should have_xpath(
-        "//li[.='#{@hotel2.name}']"
-      )
     end
 
-    it "should list all hotel names (css)" do
-      hotel_names = page.all('ul li').map(&:text)
-      hotel_names.should include(@hotel1.name)
-      hotel_names.should include(@hotel2.name)
+    describe "when the requested format is xml" do
+      before do
+        visit "/hotels.xml"
+      end
+
+      it "should render the found hotels as xml" do
+        page.should have_xpath('//hotels[@type="array"]')
+      end
     end
 
-    describe "when clicking on a link" do
+    describe "when the requested format is json" do
       before do
-        click_link(@hotel1.name)
+        visit '/hotels.json'
       end
 
-      it "should show detailed information for our hotel" do
-        page.should have_xpath(
-          "//h1[.='#{@hotel1.name}']"
-        )
+      it "should render the found hotels as json" do
+        hotels = JSON.parse(page.body)
+        hotels.should be_an(Array)
+        hotels.first["hotel"]["name"].should == "St. Clair Hotel"
       end
     end
 
   end
+
 end