Gemfile

gem 'sinatra'
group :development,:test do
  gem 'rspec'
  gem 'rack-test'
end

instance_variable_spec.rb

require 'spec_helper'
describe "My Site" do
  def app
   app_instance  = MySite.prepare_instance
  end
  context "before" do
    it "sets @title" do
      get "/"
      app.instance_variable_get("@title").should match("Thanks to the person that figured out how to get the Sinatra app instance")
    end
  end
end

Instructions.creole

Installing Rspec into Sinatra with Rake

in your project directory

1. Open the Gist GIST with complete instructions and files
2. Update the Gemfile
3. Update the Rakefile
4. Create a .rspec file
5. Follow the Instructions

Instructions

# run the bundle command
$ bundle

# .rspec file
$ echo "--color" >> .rspec
$ echo "--backtrace" >> .rspec

# .rspec file
$ echo "--color" >> .rspec
$ echo "--backtrace" >> .rspec

# spec directory
$ mkdir spec
$ touch spec/spec_helper.rb
# Update spec/spec_helper.rb to match file in gist.
# mkdir spec/sample
$ touch spec/sample/instance_variable_spec.rb
# update spec/sample/instance_variable_spec.rb to match file in gist

Rakefile

require 'rspec/core'
require 'rspec/core/rake_task'

task :default => :spec

desc "Run all specs in spec directory (excluding plugin specs)"
RSpec::Core::RakeTask.new(:spec)

spec_helper.rb

require 'rack/test'
# Require your modules here
# this is how i do it:
# require_relative '../sinatra_modules'

RSpec.configure do |conf|
  conf.include Rack::Test::Methods
end

#https://gist.github.com/1523353
class Sinatra::Base
  @@prepared = nil

  def self.onion_core
    onion = prototype
    loop do
      onion = onion.instance_variable_get('@app')
      return onion if onion.class == self || onion.nil?
    end
  end

  def self.prepare_instance
    @@prepared = onion_core
  end

  # Override
  def call(env)
    d = @@prepared || dup
    @@prepared = nil
    d.call!(env)
  end
end