xml.rb

# Taken from Thoughtbot-shoulda
# Put me in RAILS_ROOT/test/shoulda_macros/xml.rb

  # Macro that creates a test asserting that the controller responded with an XML content-type
  # and that the XML contains +<name/>+ as the root element.
  def should_respond_with_xml_for(name = nil)
    should "have ContentType set to 'application/xml'" do
      assert_xml_response
    end
    
    if name
      should "return <#{name}/> as the root element" do
        body = @response.body.first(100).map {|l| "  #{l}"}
        assert_select name.to_s.dasherize, 1, "Body:\n#{body}...\nDoes not have <#{name}/> as the root element."
      end
    end
  end
  alias should_respond_with_xml should_respond_with_xml_for
  
            
  def make_show_xml_tests(res) # :nodoc:
    context "on GET to #{controller_name_from_class}#show as xml" do
      setup do
        request_xml
        record = get_existing_record(res)
        parent_params = make_parent_params(res, record)
        get :show, parent_params.merge({ res.identifier => record.to_param })          
      end

      if res.denied.actions.include?(:show)
        should_not_assign_to res.object
        should_respond_with 401
      else
        should_assign_to res.object          
        should_respond_with :success
        should_respond_with_xml_for res.object
      end
    end
  end

  def make_edit_xml_tests(res) # :nodoc:
    # XML doesn't need an :edit action
  end

  def make_new_xml_tests(res) # :nodoc:
    # XML doesn't need a :new action
  end

  def make_index_xml_tests(res) # :nodoc:
    context "on GET to #{controller_name_from_class}#index as xml" do
      setup do
        request_xml
        parent_params = make_parent_params(res)
        get(:index, parent_params)          
      end

      if res.denied.actions.include?(:index)
        should_not_assign_to res.object.to_s.pluralize
        should_respond_with 401          
      else
        should_respond_with :success
        should_respond_with_xml_for res.object.to_s.pluralize
        should_assign_to res.object.to_s.pluralize
      end
    end
  end

  def make_destroy_xml_tests(res) # :nodoc:
    context "on DELETE to #{controller_name_from_class}#destroy as xml" do
      setup do
        request_xml
        @record = get_existing_record(res)
        parent_params = make_parent_params(res, @record)
        delete :destroy, parent_params.merge({ res.identifier => @record.to_param })
      end

      if res.denied.actions.include?(:destroy)
        should_respond_with 401
  
        should "not destroy record" do
          assert @record.reload
        end
      else
        should "destroy record" do
          assert_raises(::ActiveRecord::RecordNotFound, "@#{res.object} was not destroyed.") do
            @record.reload
          end
        end
      end
    end
  end

  def make_create_xml_tests(res) # :nodoc:
    context "on POST to #{controller_name_from_class}#create as xml" do
      setup do
        request_xml
        parent_params = make_parent_params(res)
        @count = res.klass.count
        post :create, parent_params.merge(res.object => res.create.params)
      end

      if res.denied.actions.include?(:create)
        should_respond_with 401
        should_not_assign_to res.object
  
        should "not create new record" do
          assert_equal @count, res.klass.count
        end          
      else
        should_assign_to res.object

        should "not have errors on @#{res.object}" do
          assert_equal [], pretty_error_messages(assigns(res.object)), "@#{res.object} has errors:"            
        end
      end      
    end
  end

  def make_update_xml_tests(res) # :nodoc:
    context "on PUT to #{controller_name_from_class}#update as xml" do
      setup do
        request_xml
        @record = get_existing_record(res)
        parent_params = make_parent_params(res, @record)
        put :update, parent_params.merge(res.identifier => @record.to_param, res.object => res.update.params)
      end

      if res.denied.actions.include?(:update)
        should_not_assign_to res.object
        should_respond_with 401
      else
        should_assign_to res.object

        should "not have errors on @#{res.object}" do
          assert_equal [], assigns(res.object).errors.full_messages, "@#{res.object} has errors:"
        end
      end
    end
  end


  # Sets the next request's format to 'application/xml'
  def request_xml
    @request.accept = "application/xml"
  end

  # Asserts that the controller's response was 'application/xml'
  def assert_xml_response
    content_type = (@response.headers["Content-Type"] || @response.headers["type"]).to_s
    regex = %r{\bapplication/xml\b}

    msg = "Content Type '#{content_type.inspect}' doesn't match '#{regex.inspect}'\n"
    msg += "Body: #{@response.body.first(100).chomp} ..." 

    assert_match regex, content_type, msg
  end