rails--rails/actionpack/test/dispatch/request_id_test.rb

require 'abstract_unit'

class RequestIdTest < ActiveSupport::TestCase
  test "passing on the request id from the outside" do
    assert_equal "external-uu-rid", stub_request('HTTP_X_REQUEST_ID' => 'external-uu-rid').uuid
  end

  test "ensure that only alphanumeric uurids are accepted" do
    assert_equal "X-Hacked-HeaderStuff", stub_request('HTTP_X_REQUEST_ID' => '; X-Hacked-Header: Stuff').uuid
  end

  test "ensure that 255 char limit on the request id is being enforced" do
    assert_equal "X" * 255, stub_request('HTTP_X_REQUEST_ID' => 'X' * 500).uuid
  end

  test "generating a request id when none is supplied" do
    assert_match(/\w+-\w+-\w+-\w+-\w+/, stub_request.uuid)
  end

  private

  def stub_request(env = {})
    ActionDispatch::RequestId.new(lambda { |environment| [ 200, environment, [] ] }).call(env)
    ActionDispatch::Request.new(env)
  end
end

class RequestIdResponseTest < ActionDispatch::IntegrationTest
  class TestController < ActionController::Base
    def index
      head :ok
    end
  end

  test "request id is passed all the way to the response" do
    with_test_route_set do
      get '/'
      assert_match(/\w+/, @response.headers["X-Request-Id"])
    end
  end

  test "request id given on request is passed all the way to the response" do
    with_test_route_set do
      get '/', {}, 'HTTP_X_REQUEST_ID' => 'X' * 500
      assert_equal "X" * 255, @response.headers["X-Request-Id"]
    end
  end


  private

  def with_test_route_set
    with_routing do |set|
      set.draw do
        match '/', :to => ::RequestIdResponseTest::TestController.action(:index)
      end

      @app = self.class.build_app(set) do |middleware|
        middleware.use ActionDispatch::RequestId
      end

      yield
    end
  end
end