test.rb

require 'bundler/setup'
require 'rom'
require 'rom-roda'
require 'rom-sql'

class AppCore < Roda
  plugin :rom, default: {
    setup: [:sql, 'sqlite::memory'],
    plugins: [:auto_registration]
  },
               load_path: 'models'

  route do |r|
    # GET / request
    r.root do
      'hi'
    end
  end
end

run AppCore.freeze.app