Sinatra 的测试可以使用任何基于 Rack 的测试程序库或者框架来编写。Rack::Test 是推荐候选：

require 'my_sinatra_app'
require 'test/unit'
require 'rack/test'

class MyAppTest < Test::Unit::TestCase
  include Rack::Test::Methods

  def app
    Sinatra::Application
  end

  def test_my_default
    get '/'
    assert_equal 'Hello World!', last_response.body
  end

  def test_with_params
    get '/meet', :name => 'Frank'
    assert_equal 'Hello Frank!', last_response.body
  end

  def test_with_rack_env
    get '/', {}, 'HTTP_USER_AGENT' => 'Songbird'
    assert_equal "You're using Songbird!", last_response.body
  end
end

请注意：内置的 Sinatra::Test 模块和 Sinatra::TestHarness 类 在 0.9.2 版本已废弃。