database_cleaner, rspec-rails and capybara configuration strategy

database_cleaner.rb

#
# What's this do?
#
# Keep your test database clean whilst testing, using database_cleaner, rspec-rails and capybara.
#
# Instructions:
#
# Place this file in spec/support
#
# Assumptions:
#
# ruby - https://github.com/ruby/ruby
# rails - https://github.com/rails/rails/
# rspec-rails - https://github.com/rspec/rspec-rails | https://relishapp.com/rspec/rspec-rails/docs
# capybara - https://github.com/jnicklas/capybara | http://jnicklas.github.io/capybara/
# database_cleaner - https://github.com/DatabaseCleaner/database_cleaner
#
# Tested using the following versions:
#
# ruby '2.1.0'
# rails '4.1.1'
# rspec-rails '~> 3.0.2' 
# capybara '~> 2.4.1' 
# database_cleaner '~> 1.3.0' 
#
# Assumes capybara spec/features specs IAW capybara suggested usage.
#
# Credits:
#
# From http://devblog.avdi.org/2012/08/31/configuring-database_cleaner-with-rails-rspec-capybara-and-selenium/
# See also https://coderwall.com/p/ahtb7w
RSpec.configure do |config|
  #
  # If you're not using ActiveRecord, or you'd prefer not to run 
  # each of your examples within a transaction, remove the following 
  # line or assign false instead of true.
  config.use_transactional_fixtures = false

  #
  # Clean up and initialize database before 
  # running test exmaples.
  config.before(:suite) do
    #
    # Truncate database to clean up garbage from 
    # interrupted or badly written examples.
    DatabaseCleaner.clean_with(:truncation)

    #
    # https://coderwall.com/p/ahtb7w 
    #
    # Seed dataase. Use it only for essential
    # to run application data.
    load "#{Rails.root}/db/seeds.rb"
  end

  #
  # Use really fast transaction strategy for all 
  # examples...
  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  #
  # ...except `js: true` capybara specs.
  config.before(:each, :js => true) do
    DatabaseCleaner.strategy = :truncation
  end

  config.before(:each) do
    #
    # Start transaction.
    DatabaseCleaner.start
  end

  config.after(:each) do
    #
    # Rollback transaction.
    DatabaseCleaner.clean
  end

  #
  # ttps://coderwall.com/p/ahtb7w
  config.after(:each) do
    #
    # Clear session data.
    Capybara.reset_sessions!
  end
end