Tests r not passing for create action please help....

.errors

Failures:

  1) MicropostsController POST 'create' failure should render the home page
     Failure/Error: response.should render_template('pages/home')
       expecting <"pages/home"> but rendering with <"">
     # ./spec/controllers/microposts_controller_spec.rb:38:in `block (4 levels) in <top (required)>'

  2) MicropostsController POST 'create' success should create a micropost
     Failure/Error: lambda do
       count should have been changed by 1, but was changed by 0
     # ./spec/controllers/microposts_controller_spec.rb:49:in `block (4 levels) in <top (required)>'

  3) MicropostsController POST 'create' success should redirect to the home page
     Failure/Error: response.should redirect_to(root_path)
       Expected response to be a redirect to <http://test.host/> but was a redirect to <http://test.host/signin>
     # ./spec/controllers/microposts_controller_spec.rb:56:in `block (4 levels) in <top (required)>'

  4) MicropostsController POST 'create' success should have a flash message
     Failure/Error: flash[:success].should =~ /micropost created/i
       expected: /micropost created/i
            got: nil (using =~)
     # ./spec/controllers/microposts_controller_spec.rb:61:in `block (4 levels) in <top (required)>'

Finished in 4.1 seconds
103 examples, 4 failures

Failed examples:

rspec ./spec/controllers/microposts_controller_spec.rb:36 # MicropostsController POST 'create' failure should render the home page
rspec ./spec/controllers/microposts_controller_spec.rb:48 # MicropostsController POST 'create' success should create a micropost
rspec ./spec/controllers/microposts_controller_spec.rb:54 # MicropostsController POST 'create' success should redirect to the home page
rspec ./spec/controllers/microposts_controller_spec.rb:59 # MicropostsController POST 'create' success should have a flash message

_posts.html.erb

<%= form_for(@micropost) do |f| %>
  <%= render 'shared/error_messages', :object => f.object %>
  <div class="field">
    <%= f.text_area :content %>
  </div>
  <div class="actions">
    <%= f.submit "Submit" %>
  </div>
<% end %>

controller.rb

class MicropostsController < ApplicationController
  before_filter :authenticate

  def create
    @micropost  = current_user.microposts.build(params[:micropost])
    if @micropost.save
      flash[:success] = "Micropost created!"
      redirect_to root_path
    else
      render 'pages/home'
    end
  end
  
  def destroy 
  end
end

controller_spec.rb

require 'spec_helper'

describe MicropostsController do
  render_views
  
  describe "access controll" do
    
    it "should deny access to 'create'" do
      post :create	
      response.should redirect_to(signin_path)
    end  
    
    it "should deny access to 'destroy'" do
      delete :destroy, :id => 1	
      response.should redirect_to(signin_path)
    end
  end
  describe "POST 'create'" do

    before(:each) do
      @user = test_sign_in(Factory(:user))
    end

    describe "failure" do

      before(:each) do
        @attr = { :content => "" }
      end

      it "should not create a micropost" do
        lambda do
          post :create, :micropost => @attr
        end.should_not change(Micropost, :count)
      end

      it "should render the home page" do
        post :create, :micropost => @attr
        response.should render_template('pages/home')
      end
    end
    
    describe "success" do

      before(:each) do
        @attr = { :content => "Lorem ipsum" }
      end

      it "should create a micropost" do
        lambda do
          post :create, :micropost => @attr
        end.should change(Micropost, :count).by(1)
      end

      it "should redirect to the home page" do
        post :create, :micropost => @attr
        response.should redirect_to(root_path)
      end

      it "should have a flash message" do
        post :create, :micropost => @attr
        flash[:success].should =~ /micropost created/i
      end
    end
  end
end

home.html.erb

<% if signed_in? %>
  <table class="front" summary="For signed-in users">
    <tr>
      <td class="main">
        <h1 class="micropost">What's up?</h1>
        <%= render 'posts' %>
      </td>
    </tr>
  </table>
<% else %>
  <h1>Sample App</h1>

  <%= link_to "Sign up now!", signup_path, :class => "signup_button round" %>
<% end %>