Sign in a user for capybara tests

gistfile1.rb

module RSpecHelpers
  module InstanceMethods
    def sign_in(user=nil)
      user ||= User.make

      fill_in 'user[email]', :with => user.email
      fill_in 'user[password]', :with => user.password

      click_button 'Sign in'
    end
  end
end

RSpec.configure do |config|
  config.include(RSpecHelpers::InstanceMethods)
end