.rspec

--color
--require spec_helper

Gemfile

source 'https://rubygems.org'

gem "sinatra"

group :test do
  gem "rspec"
  gem "capybara"
  gem "capybara-slow_finder_errors", "0.1.4"
  gem "poltergeist"
end

simple_app.rb

require 'sinatra'

get '/' do
  erb '<h1>Hello World</h1>'
end

simple_app_spec.rb

RSpec.describe "Simple app", js: true, type: :feature do
  it "does something" do
    visit "/"
    expect(page.has_content?("Goodbye World")).to be_falsy
  end
end

spec_helper.rb

require_relative "../simple_app"
require "capybara/rspec"
require "capybara/poltergeist"
require "capybara/slow_finder_errors"

Capybara.app = Sinatra::Application
Capybara.javascript_driver = :poltergeist

RSpec.configure do |config|
  config.include Capybara::DSL, type: :feature
end