Rabl error in Rails specs

commands_run

rails new rabl-test
rails generate scaffold task name:string
rails generate rspec:install

index.rabl_spec.rb

require 'spec_helper'

describe "tasks/index.json" do
  before(:each) do
    assign(:tasks, [
      stub_model(Task,
        :name => "Name"
      ),
      stub_model(Task,
        :name => "Name"
      )
                   ])
  end

  it "renders" do
    render
    rendered.should == %([{"task":{"name":"Name"}},{"task":{"name":"Name"}}])
  end

end

model_task.rb

class Task < ActiveRecord::Base
end

rspec_errors

.F...

Failures:

  1) tasks/index.json renders
     Failure/Error: render
     ActionView::MissingTemplate:
       Missing template tasks/index.json with {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml, :rabl], :formats=>[:html, :text, :js, :css, :ics, :csv, :xml, :rss, :atom, :yaml, :multipart_form, :url_encoded_form, :json], :locale=>[:en, :en]} in view paths "/tmp/rabl-test/app/views"
     # ./spec/views/tasks/index.rabl_spec.rb:17:in `block (2 levels) in <top (required)>'

Finished in 0.44473 seconds
5 examples, 1 failure

Failed examples:

rspec ./spec/views/tasks/index.rabl_spec.rb:16 # tasks/index.json renders

tasks_controller.rb

class TasksController < ApplicationController
  respond_to :json, :xml, :html

  # GET /tasks
  # GET /tasks.xml
  def index
    @tasks = Task.all

    respond_with(@tasks)
  end

  # GET /tasks/1
  # GET /tasks/1.xml
  def show
    @task = Task.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @task }
    end
  end

  # GET /tasks/new
  # GET /tasks/new.xml
  def new
    @task = Task.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @task }
    end
  end

  # GET /tasks/1/edit
  def edit
    @task = Task.find(params[:id])
  end

  # POST /tasks
  # POST /tasks.xml
  def create
    @task = Task.new(params[:task])

    respond_to do |format|
      if @task.save
        format.html { redirect_to(@task, :notice => 'Task was successfully created.') }
        format.xml  { render :xml => @task, :status => :created, :location => @task }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @task.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /tasks/1
  # PUT /tasks/1.xml
  def update
    @task = Task.find(params[:id])

    respond_to do |format|
      if @task.update_attributes(params[:task])
        format.html { redirect_to(@task, :notice => 'Task was successfully updated.') }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @task.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /tasks/1
  # DELETE /tasks/1.xml
  def destroy
    @task = Task.find(params[:id])
    @task.destroy

    respond_to do |format|
      format.html { redirect_to(tasks_url) }
      format.xml  { head :ok }
    end
  end
end

views_index.rabl

collection @tasks

attributes(:name, :id, :created_at, :updated_at)