gistfile1.rb

# demo/app.rb

# set the root of the whole app
::APP_ROOT = File.dirname(File.expand_path(__FILE__)) unless defined?(APP_ROOT)

class MyApp < Sinatra::Base 
  
  # snip  set views etc
  
  set :environment, ENV["RACK_ENV"] ||= 'test'

  # configure do # optional
    ::DataMapper::Logger.new("#{APP_ROOT}/log/dm.admin.#{environment}.log", :debug)
    ::DataMapper.setup(:default, "sqlite3:#{APP_ROOT}/db/db.#{environment}.sqlite3")
    ::DataMapper.auto_upgrade!
  # end
  
  get '/' do
    "Hello world!"
  end
  
end

#===========================

# demo/test/test_helper.rb


require 'rubygems'
require 'test/spec'
require File.join(File.dirname(__FILE__), '..', 'app.rb')
require 'rack/test'

class Sinatra::Base
  # Allow assertions in request context
  include Test::Unit::Assertions
end

class Test::Unit::TestCase
  # include Sinatra::Test
  include Rack::Test::Methods
  
  # this does nothing in the main app
  # def setup
  #   Sinatra::Base.set :environment, :test
  # end
  
  def app
    MyApp.new
  end
  
end

#===========================

#demo/test/app_test.rb

require File.join(File.dirname(__FILE__) ,'test_helper.rb')


describe "App" do 
  
  before(:each) do
    @app = MyApp
    @new_app = @app.new
  end
  
  describe "#environment" do 
    it "should be set to :test" do 
      assert_equal('test', @app.environment)
    end
  end
  
  describe "GET /" do 
    
    it "should get hello world" do 
      get('/')
      assert_equal('Hello world!', last_response.body)
    end
    
  end #/GET /
  
end