Diverge Metal implementation from Rack::Cascade since we want the last app to return its headers and body if the status is a 404.

Add a repair_helper to repair changes to the validations inside validations_test.rb [#674 state:resolved]

Many of the tests in validations_test would add a new validation to
models.  However, only Topic was being reset with a fairly aggressive
clearing of all validations.  None of the other models being used however
were recieving the same treatment.  Now we use repair_validations(Topic)
for the whole test case because most test cases use Topic and then the
block form of repair_validations(<other_models>) inside any tests that use
other models.
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

This reverts commit e8c19154.

Reasons :
- ActionPack tests run very slow
- Gem.searcher hanging for long time when extension is nil

Signed-off-by: NFrederick Cheung <frederick.cheung@gmail.com>

No freeing Result objects causes the MySQL driver to free result sets
at undefined times, this can lead to erratic performance in your
application.
Signed-off-by: NFrederick Cheung <frederick.cheung@gmail.com>

Signed-off-by: NFrederick Cheung <frederick.cheung@gmail.com>

Persistent session identifier support for CookieSessionStore and API compat. with the server side stores [#1591 state:resolved]
Signed-off-by: NJoshua Peek <josh@joshpeek.com>

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

When checking for the wrong routing method, ensure the environment is passed to recognize optimize [#1406 state:resolved]

Instead of calling super to pass the request on, return a 404.
The modified app looks like this:

  # app/metal/poller.rb
  class Poller
    def self.call(env)
      if env["PATH_INFO"] =~ /^\/poller/
        [200, {"Content-Type" => "text/html"}, "Hello, World!"]
      else
        [404, {"Content-Type" => "text/html"}, "Not Found"]
      end
    end
  end

But you aren't locked in to just Rails:

  # app/metal/api.rb
  require 'sinatra'
  Sinatra::Application.default_options.merge!(:run => false, :env => :production)
  Api = Sinatra.application unless defined? Api

  get '/interesting/new/ideas' do
    'Hello Sinatra!'
  end

Decorate responses from Rack Middleware and Rails Metal for the purposes of integration testing. A test for the following Metal:

    class Poller < Rails::Rack::Metal
      def call(env)
        if env["PATH_INFO"] =~ /^\/poller/
          [200, {"Content-Type" => "text/plain"}, "Hello World!"]
        else
          super
        end
      end
    end

might be tested like so:

  class PollerTest < ActionController::IntegrationTest
    test "poller returns hello world" do
      get "/poller"
      assert_response 200
      assert_response :success
      assert_response :ok
      assert_equal "Hello World!", response.body
    end
  end

[#1588 state:committed]
Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

  # app/metal/poller.rb
  class Poller < Rails::Rack::Metal
    def call(env)
      if env["PATH_INFO"] =~ /^\/poller/
        [200, {"Content-Type" => "application/json"}, Message.recent.to_json]
      else
        super
      end
    end
  end

* There is a generator to help you get started
    `script/generate metal poller`

* Also, metal bits can be ran standalone with rackup
    `rackup app/metal/poller.rb`

Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

Do not output an ETag header if response body is blank or when sending files with send_file(... :xsendfile => true) [#1578 state:committed]
Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

Session objects are always a hash, so we need to ensure a flash hash is always assigned to the session