Sinatra with Rspec and custom rspec matcher

be_huka.rb

RSpec::Matchers.define :be_huka do
  match do |actual|
    actual == true
  end
end

config.ru

require 'rubygems'
require 'bundler'
Bundler.require

require './hello_app'

run HelloApp::Routes

Gemfile

source 'http://rubygems.org'

gem 'sinatra'

group :test do
  gem "rspec"
  gem "rack-test"
end

hello_app.rb

module HelloApp

  module Models
    class TestModel
      attr_accessor :name, :email

      def save
        true
      end
    end
  end

  class Routes < Sinatra::Base
    get '/' do
      'Hello world'
    end
  end
end

hello_world_spec.rb

require File.join(File.dirname(__FILE__), '..', 'spec_helper')

describe HelloApp::Models::TestModel do
  describe '#save' do
    let(:test_model) { HelloApp::Models::TestModel.new }
    subject { test_model }
    its(:save) { should be_huka }
  end
end

spec_helper.rb

require 'rubygems'
require 'bundler'
Bundler.require

require File.join(File.dirname(__FILE__), '..', 'hello_app')

require 'rspec'
require 'rspec/autorun'

# set test environment
set :environment, :test
set :run, false
set :raise_errors, true
set :logging, false

# Define new matcher
RSpec::Matchers.define :be_huka do
  match do |actual|
    actual == true
  end
end