Simple spec example

app_spec.rb

require 'spec_helper'

describe My::App do
    before :each do
        # this will be executed before each example
        @app = My::App.new 'test'
    end

    it "should do something" do
        # this is an example
        @app.method.should == 'method'
    end
     
    it "should do something else" do
        # this is another example
        result = @app.one + 1
        result.should == 2
    end
end

Rakefile

$: << File.expand_path(File.dirname(__FILE__) + "/lib")

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

desc "Run all the specs"
RSpec::Core::RakeTask.new do |t|
    t.pattern = ENV['spec'] || 'spec/**/*_spec.rb'
    t.rspec_opts = ["--color"]
end

spec_helper.rb

# you will require everything you need for your specs to run
require 'my-app' #<- change to your app
require 'rack/test' #<- great to test sinatra apps
require 'nokogiri'

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