gaahrdner · March 5, 2012 08:31 · Mar 5, 2012 · Mar 5, 2012 · Mar 5, 2012
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -31,11 +31,9 @@ def show
 
 describe ApplicationsController do
   context "for an application that doesn't exist" do
-    controller do
-      def show
-        raise ActiveRecord::RecordNotFound
-      end 
-    end 
+    before do
+      Application.should_receive(:find).with('does_not_exist').and_raise(ActiveRecord::RecordNotFound)
+    end
 
     it "should return a 404" do
       get :show, :format => :json, :id => 'does_not_exist'

diff --git a/gistfile1.rb b/gistfile1.rb
@@ -42,4 +42,12 @@ def show
       response.status.should == 404 
     end
   end
-end
+end
+
+### rspec output
+  1) ApplicationsController JSON GET :show for an application that doesn't exist should return a 404
+     Failure/Error: raise ActiveRecord::RecordNotFound
+     ActiveRecord::RecordNotFound:
+       ActiveRecord::RecordNotFound
+     # ./spec/controllers/applications_controller_spec.rb:54:in `index'
+     # ./spec/controllers/applications_controller_spec.rb:60:in `block (5 levels) in <top (required)>'
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,45 @@
+### application_controller.rb
+class ApplicationController < ActionController::Base
+  rescue_from ActiveRecord::RecordNotFound, :with => :not_found
+
+  private
+
+  def not_found(exception)
+    respond_to do |format|
+      h = { :status => "error", :message => exception.message }
+      format.html { render :file => "#{RAILS_ROOT}/public/404.html", :status => :not_found }
+      format.json { render :json => h, :status => :not_found }
+      format.xml  { render :xml => h, :status => :not_found }
+    end 
+  end   
+end
+
+### applications_controller.rb
+class ApplicationsController < ApplicationController
+  respond_to :html, :xml, :json
+
+  def show
+    @application = Application.find(params[:id], :include => includes) 
+    respond_with(@application) do |format|
+      format.xml
+      format.json
+    end
+  end
+end
+
+### applications_controller_spec.rb
+
+describe ApplicationsController do
+  context "for an application that doesn't exist" do
+    controller do
+      def show
+        raise ActiveRecord::RecordNotFound
+      end 
+    end 
+
+    it "should return a 404" do
+      get :show, :format => :json, :id => 'does_not_exist'
+      response.status.should == 404 
+    end
+  end
+end