> mkdir foo
> cd foo
> gem install bundler

Gemfile

source 'https://rubygems.org'
gem 'minitest', '~> 5.3.4'
gem 'rspec', '2.14.1'
gem 'capybara', '2.3.0'
gem 'selenium-webdriver'
> bundle install
> rspec --init

lib/zombie.rb

class Zombie
  attr_accessor :name
 
  def initialize
    @name = 'Ash'
  end
 
end

spec/lib/zombie_spec.rb

require 'zombie'

describe Zombie do

  it 'is named Ash' do
    zombie = Zombie.new
    expect(zombie.name).to eq('Ash')
  end

end

> rspec spec/lib/zombie_spec.rb

Trouble shooting

Use this is having trouble with named routes and rspec.

# Added below
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'

RSpec.configure do |config|
  config.treat_symbols_as_metadata_keys_with_true_values = true
  config.run_all_when_everything_filtered = true
  config.filter_run :focus
  config.order = 'random'
  config.use_transactional_fixtures = true


  config.include Capybara::DSL # JR - added to get paths working
end