test/spec/rails
This plugin contain some helpers to test your Rails app using test/spec.
Installation
------------
 * Install test/spec: gem install test-spec
 * Install test/spec/rails
 * require 'test/spec/rails' in your test_helper.rb
Source
------
  test/spec/rails uses Git for source control. If you're running edge Rails, you can install with:
    script/plugin install git://github.com/pelargir/test_spec_on_rails.git
  Otherwise, I recommend using the git-rails gem:
    sudo gem install git-rails
    git-rails install git://github.com/pelargir/test_spec_on_rails.git test_spec_on_rails
Model validation
----------------
  @user.should.validate
  @user.should.not.validate
  or:
  @user.should.be.validated
  @user.should.not.be.validated
Redirection
-----------
  response.should.be.redirected           # assert_response :redirect
  response.should.redirect foo_url(@foo)  # assert_redirected_to foo_url(@foo)
  should.redirect_to :action => 'show'    # because "response" is optional
  
  It's aliased as redirect, redirect_to, redirected and redirected_to
Output verification
-------------------
  Wrapper for assert_select:
  
  get :show
  page.should.select "form#user_form"             # require the output to have a <form id="user_form">
  
  page.should.select "form#user_form" do |form|
    form.should.select "input[type=submit]"       # the user_form must include a <input type="submit">
  end
HTTP Status
-----------
  Wrapper for assert_response:
  status.should.be :success
  status.should.be 200
Which template was rendered?
----------------------------
  Wrapper for assert_template:
  
  template.should.be "foo/show.rhtml"
Which layout used?
------------------
  Wrapper for asserting that a certain layout is used:
  
  layout.should.be "foo"
URL testing
-----------
  get :show, :user_id => 1
  url.should.be "/users/1"
  url.should.be :controller => "users", :action => "show", :user_id => 1
      
Difference
----------
  Wrapper for assert_difference:
  
  Article.should.differ(:count).by(2) { blah }
Routing to set of url options from a given path (i.e., #assert_generates)
-------------------------------------------------------------------------
  assert_generates "/users/1", :controller => "users", :action => "show", :id  => "1"
    
    becomes 
  {:controller => "users", :action => "show", :id  => "1"}.should.route_to "/users/1"
Routing from a set of url options to an expected path (i.e., #assert_recognizes)
--------------------------------------------------------------------------------
  assert_recognizes({:controller => "users", :action => "show", :id => "1"}, {:path => "/users/1", :method => :get})
    becomes
  {:path => "/users/1", :method => :get}.should.route_from :controller => "users", :action => "show", :id =>"1"
Setup controller for testing + example usage
--------------------------------------------
  context "A guest" do
    use_controller FooController
    
    specify "isn't allowed to foo" do
      post :create, :foo => 'bar'
      flash[:error].should.not.be.blank
      response.should.redirect :controller => 'front', :action => 'show'
      assigns(:foo).errors.on(:bar).should.not.be.blank
      assigns(:foo).should.not.validate
      follow_redirect
      page.should.select "#errors", :text => /#{flash[:error]}/
    end
  end
  
  context "Tuxie" do
    setup do
      use_controller FooController
      login_as :tuxie
    end
    
    specify "may foo" do
      post :create, :foo => 'bar'
      flash[:notice].should.not.be.blank
      assigns(:foo).errors.should.be.empty
      assigns(:foo).should.validate
      should.redirect_to :action => 'show'
      follow_redirect
      page.should.select "#notice", :text => /#{flash[:notice]}/
    end
  end
Misc
----
  page, response and request are just aliases for self (the TestCase) so the following
  are functionally identical:
  
  page.should.redirect
  response.should.redirect
  request.should.redirect
  
  output, body, html and xhtml return @response.body so the following lines are identical:
  
  output.should.match /foo/
  html.should.match /foo/
  xhtml.should.match /foo/
  body.should.match /foo/
  
  If an object respond to #should_equal, that method will be used instead of assert_equal
  when using foo.should.equal(bar) or foo.should.be(bar)
  foo.should.not.equal and foo.should.not.be look for #should_not_equal
Credit
------
 * Created by Per "Tuxie" Wigren <per.wigren@gmail.com>
 * Enhanced by Rick Olson <technoweenie@gmail.com>
 * Currently maintained by Matthew Bass <pelargir@gmail.com>