help with rspec and javascript.

I want to test an action called with javascript. The action is:

def index unless params[:customer_full_name].blank?    full_name = params[:customer_full_name]    @customers = Customer.search_full_name(full_name).paginate(:per_page => 10,        :page => params[:page]) else    @customers = Customer.all.paginate(:per_page => 10, :page => params[:page]) end render :layout => false if request.xhr? end

In the view I have a form with a search field. When I put values in this field it calls a javascript function. I've tried to write this test:

require 'spec_helper' require 'capybara/rspec'

describe CustomersController do include Devise::TestHelpers

describe "search with js", :js => true do    before(:each) do      @customers = mock_model(Customer, :full_name => "User-1")    end

   context "when full_name is 'user'" do      it "should find customers" do        login        page.should have_content "Customers"        page.should have_content "Dashboard"        click_link('Customers')        fill_in "customer_full_name", :with => "User"        @full_name = "User"        Customer.should_receive(:search_full_name).with(@full_name).and_return(@customers)        @customers.should_receive(:paginate)        do_get        assigns(:customers).should_not be_nil      end    end

def login    User.make!    visit '/d/users/sign_in/'    fill_in "user_email", :with => "user0001@example.com"    fill_in "user_password", :with => "password"    click_button "Sign in" end

def do_get page= nil, format = 'html'    get 'index', :customer_full_name => @full_name, :format => format end

Doesn't work. Any advise?