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

# frozen_string_literal: true

require "abstract_unit"

class DebugLocksTest < ActionDispatch::IntegrationTest
  setup do
    build_app
  end

  def test_render_threads_status
    thread_ready = Concurrent::CountDownLatch.new
    test_terminated = Concurrent::CountDownLatch.new

    thread = Thread.new do
      ActiveSupport::Dependencies.interlock.running do
        thread_ready.count_down
        test_terminated.wait
      end
    end

    thread_ready.wait

    get "/rails/locks"

    test_terminated.count_down

    assert_match(/Thread.*?Sharing/, @response.body)
  ensure
    thread.join
  end

  private
    def build_app
      @app = self.class.build_app do |middleware|
        middleware.use ActionDispatch::DebugLocks
      end
    end
end