问用于Sinatra的Rspec render_template等价物？

EN

# config.ru

require 'rubygems'
require "bundler/setup"

root = File.expand_path File.dirname(__FILE__)
require File.join( root , "./app/config.rb" )

# everything was moved into a separate module/file 
# to make it easier to set up tests

map "/" do
  run HelloWorld.app
end

# app/config.rb
require 'main'

module HelloWorld
  def self.app
    Rack::Builder.app do
      # middleware setup here, cookies etc
      run App
    end
  end
end

# app/main.rb
require 'sinatra/base'

module HelloWorld
  class App < Sinatra::Base
    get "/", :provides => :json do
      {key: "value"}.to_json
    end
  end
end

# spec/spec_helper.rb

require 'rspec'
Spec_dir = File.expand_path( File.dirname __FILE__ )

require 'rack/test'

Dir[ File.join( Spec_dir, "/support/**/*.rb")].each do |f|
  require f
end

# spec/support/shared/all_routes.rb

require 'hello_world'  # <-- your sinatra app

shared_context "All routes" do
  include Rack::Test::Methods
  let(:app){
    HelloWorld.app 
  }
end

shared_examples_for "Any route" do
  subject { last_response }
  it { should be_ok }
end

# spec/hello_world_spec.rb
require 'spec_helper'

describe 'getting some JSON' do
  include_context "All pages"

  let(:expected) {
    '{"key": "value"}'
  }

  before do
    get '/', {}, {"HTTP_ACCEPT" => "application/json" }
  end
  it_should_behave_like "Any route"

  subject { last_response.body }
  it { should == expected }
end