Slim template engine in Roda framework

app.rb

class Test < Roda
  plugin :render, engine: 'slim'

  route do |r|
    r.get 'test' do
      view :hello
    end
    r.root do
      'Home, Sweet Home'
    end
  end
end

config.ru

require 'roda'
require File.expand_path('app', File.dirname(__FILE__))
run Test.app

hello.slim

b test test test

layout.slim

doctype html
html
	head
		meta charset="UTF-8"
	body
		==yield