Messages Controller and Controller Spec

messages_controller.rb

class MessagesController < ApplicationController
  def create
    Message.new(params[:message])
    redirect_to :action => "index"
  end
end

messages_controller_spec.rb

require 'spec_helper'

class Message 
  extend ActiveModel::Naming
end

describe MessagesController do
  describe "POST create" do
    let (:message) {mock_model("Message").as_null_object}

    before do
      Message.stub(:new).and_return(message)
    end
    it "creates a new message" do
      Message.should_receive(:new).with("text" => "a quick brown fox")
      post :create, :message => { "text" => "a quick brown fox" }
    end

    it "saves the message"

    it "redirects to the Messages index" do
      post :create
      response.should redirect_to(:action => "index")
    end
  end
end