factory_login.rb

#factory:

FactoryGirl.define do
  factory :user do
    email "wishlist@example.com"
    username "User"
    password "password"
    password_confirmation "password"

    factory :confirmed_user do
      sequence(:email) { |n| "wishlist#{n}@example.com" }
      after_create do |user|
        user.confirm!
      end
    end
  end
end

#test:

require 'spec_helper'

feature 'User Profiles' do
  let!(:user) { Factory(:confirmed_user) }

  before do
    sign_in_as!(user)
    visit '/'
    click_link 'Profile'
  end