gistfile1.rb

# The code in lib/foobar.rb
require 'sinatra/base'
class Foobar < Sinatra::Base
  VERSION = '1.0.0'
  configure do
    set :foobar, environment
  end
end

# The tests in test/test_foobar.rb
require "sinatra/base"
Sinatra::Base.set :environment, :test

require "test/unit"
require "foobar"

class TestFoobar < Test::Unit::TestCase
  def setup
    @app = Foobar
  end
  
  def test_sanity
    assert_equal :test, @app.environment
    assert_equal :test, @app.foobar, "this is the one that fails. it's :development"
  end
end