Stumbled across the awesome Grape framework for writing a simple REST server for a small project I’m messing with. Since I was trying to write tests right out of the gate instead of using curl to do everything, I immediately started trying to get Rest::Test to work, which was failing miserably.

After googling and playing around for awhile, I did eventually get it. It was mainly with how to setup the app function, which didn’t make a lot of sense when config.ru uses the run function to get itself going.

I figured I’d just post this code below so if anyone else runs into this issue, they’ll have the answer. This is using MiniTest and Ruby 1.9.

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require 'helper'
require "rack/test"

class TestApi < MiniTest::Unit::TestCase
  include Rack::Test::Methods

  def app
    Rack::Builder.new {
      map "/" do
        run Rest::API # The class that extends Grape::API
      end
    }.to_app
  end

  def test_it_gives_back_some_content
    get '/rest/v1/content'
    assert last_response.ok?
    assert_equal '[]', last_response.body
  end
end