How to setup an easy test suite.

factories.rb

# ./test/factories.rb

FactoryGirl.define do
  sequence :email do |n|
    Faker::Internet.email
  end

  sequence :name do |n|
    Faker::Lorem.words(3).join(" ").capitalize
  end

  sequence :host do |n|
    "host#{n}.test"
  end

  factory :user do
    email
    password "this_rocks"
    password_confirmation "this_rocks"

    factory :confirmed_user do
      after_create { |user| user.confirm! }

      factory :confirmed_admin do
        admin true
      end
    end
  end

  factory :product do
    name
    perex { |p| "This is test product named #{p.name}" }
    description "Test product is very testable and should be bought very often."
    state "published"
    sequence(:price) { |i| (i %100) + 100 }

    factory :product_new do
      state "new"
    end

  end

  factory :category do
    title { FactoryGirl.generate(:name) }
    description { Faker::Lorem.paragraph(2) }
  end

  factory :page do
    title { FactoryGirl.generate(:name) }
    text { Lorem::Base.new('paragraphs', 3).output }
  end

end

Gemfile

# ./Gemfile

...

group :test do
  gem "shoulda-context"
  gem "shoulda-matchers"
  gem "factory_girl_rails"
  gem "mocha"
  gem "ffaker"
  gem "test-unit-capybara"
  gem "launchy"
end

...

shop_test.rb

#./test/integration/shop_test.rb

require "test_helper"

class ShopTest < ActionDispatch::IntegrationTest

  test "shopping without registration" do
    category = FactoryGirl.create(:category)
    discounted_product = FactoryGirl.create(:product,
                                            discounted: true,
                                            price: 100)
    product = FactoryGirl.create(:product,
                                 category: category,
                                 mainpage: false,
                                 price: 150)

    visit "/"

    assert page.has_content?(discounted_product.name)
    refute page.has_content?(product.name)

    click_link(category.title)

    assert page.has_content?(category.title)
    assert page.has_content?(discounted_product.name)
    assert page.has_content?(product.name)

    click_button('přidat do košíku')

    assert page.has_content?('150 Kč')
    assert page.has_content?('260 Kč') # with shipping

    fill_in "delivery_address_name", :with => 'Milan'
    fill_in "delivery_address_street", :with => 'Ulice'
    fill_in "delivery_address_city", :with => 'Prague'
    fill_in "delivery_address_zip", :with => '14000'
    fill_in "delivery_address_phone", :with => '777888999'
    check "billing_address_is_same_as_delivery_address"
    fill_in "note", :with => 'Note short'

    click_button('odeslat objednávku')

    assert page.has_content?('Email není platná hodnota')
    assert page.has_content?('Email je povinná položka')

    fill_in "email", :with => 'something@example.cz'
    click_button('odeslat objednávku')
    assert page.has_content?('Objednávka odeslána')


    order = Order.last
    assert_equal 'Milan', order.delivery_address.name
    assert_equal 'Milan', order.billing_address.name
    assert_equal 260, order.total.to_i
    assert order.note.include?('Note short')
  end

end

test_helper.rb

# ./test/test_helper.rb

ENV["RAILS_ENV"] = "test"
require File.expand_path(File.dirname(__FILE__) + "/../config/environment")

require "rails/test_help"
require "capybara/rails"

class ActiveSupport::TestCase

  def login_as(user)
    sign_in user ? (user.is_a?(User) ? user : Factory(user)) : nil
  end

  def current_user
    warden.instance_variable_get(:@users)[:user]
  end

  def assert_state(obj, state)
    assert obj && state, "Object #{obj.inspect} and state #{state.inspect} must not be null."
    assert obj.send((state.to_s + "?").to_sym), "#{obj.class} shoud be #{state} but is #{obj.state}."
  end

  def assert_save(obj)
    assert obj.save, "Errors: #{pretty_error_messages obj}"
    obj.reload
  end

  def assert_valid(obj)
    assert obj.valid?, "Errors: #{pretty_error_messages obj}"
  end
  
end

ActionController::TestCase.send :include, Devise::TestHelpers
ActionController::TestCase.class_eval do
  setup do
    @request.env["devise.mapping"] = Devise.mappings[:user]
  end
end

class ActionDispatch::IntegrationTest
  include Capybara::DSL
end