acceptance_helper.rb

# encoding: utf-8

require_relative "spec_helper"
require_relative "../my_app.rb"

require 'capybara'
require 'capybara/dsl'
require 'capybara/webkit'
require 'capybara_minitest_spec'

Capybara.app = MyApp
Capybara.default_driver = :webkit

class MiniTest::Spec
  include Capybara::DSL
end

class Capybara::Session
  def params
    Hash[*URI.parse(current_url).query.split(/\?|=|&/)]
  end
end

Gemfile

source :rubygems

gem "sinatra", "~> 1.3.2"

group :test do
  gem "minitest", "~> 2.10"
  gem "rack-test", "~> 0.6.1"
  gem "capybara", "~> 1.1"
  gem "capybara-webkit", "~> 0.11"
  gem "capybara_minitest_spec", "~> 0.2"
end

my_app_acceptance.rb

require_relative "acceptance_helper"

describe MyApp do
  it "shows a site" do
    visit '/'

    fill_in 'q', :with => 'Test'
    click_button 'Search'

    page.must_have_content 'Test'
    page.params['q'].must_equal 'Test'
  end
end

Rakefile

%w{ rubygems bundler find rake/testtask}.each { |lib| require lib }

task :default => :spec

Rake::TestTask.new(:spec) do |t|
  t.test_files = FileList['spec/*_spec.rb']
end

Rake::TestTask.new(:acceptance) do |t|
  t.test_files = FileList['spec/*_acceptance.rb']
end

spec_helper.rb

# encoding: UTF-8

require 'bundler'

Bundler.setup
Bundler.require

require 'minitest/pride'
require 'minitest/autorun'
require 'minitest/spec'
require 'rack/test'

class MiniTest::Spec
  include Rack::Test::Methods
end