remove attachment test with paper trail

test_paper_trail.rb

# Use this template to report PaperTrail bugs.
# It is based on the ActiveRecord template.
# https://github.com/rails/rails/blob/master/guides/bug_report_templates/active_record_gem.rb
begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  ruby "2.2.1"
  source "https://rubygems.org"
  gem "activerecord", "4.2.0"
  gem "minitest", "5.8.3"
  gem "paper_trail", "4.0.0", require: false
  gem "sqlite3"
  gem 'carrierwave'
  gem 'mini_magick'
  gem 'byebug'
end

require "active_record"
require "minitest/autorun"
require "logger"
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :bids, force: true do |t|
    t.string :agreement
    t.timestamps null: false
  end
  create_table :versions do |t|
    t.string :item_type, null: false
    t.integer :item_id, null: false
    t.string :event, null: false
    t.string :whodunnit
    t.text :object, limit: 1_073_741_823
    t.text :object_changes, limit: 1_073_741_823
    t.integer :transaction_id
    t.datetime :created_at
  end
  add_index :versions, [:item_type, :item_id]
  add_index :versions, [:transaction_id]

  create_table :version_associations do |t|
    t.integer  :version_id
    t.string   :foreign_key_name, null: false
    t.integer  :foreign_key_id
  end
  add_index :version_associations, [:version_id]
  add_index :version_associations, [:foreign_key_name, :foreign_key_id],
    name: "index_version_associations_on_foreign_key"
end

# We must wait to require `paper_trail.rb` until after the
# `version_associations` table exists or else PT won't track associations.
require "paper_trail"
require 'carrierwave/orm/activerecord'

class AttachmentUploader < CarrierWave::Uploader::Base
  storage :file

  include CarrierWave::MiniMagick
  include CarrierWave::MimeTypes

  version :large do
    process :resize_to_fill => [800, 800, 'Center']
  end

  version :profile do
    process :resize_to_fill => [200, 200, 'Center']
  end

  version :thumb do
    process :resize_to_fill => [50, 50, 'Center']
  end

  version :small_thumb do
    process :resize_to_fill => [20, 20, 'Center']
  end
end

class Bid < ActiveRecord::Base
  has_paper_trail
  mount_uploader :agreement, AttachmentUploader
end

ActiveSupport::TestCase.test_order = :sorted

class BugTest < ActiveSupport::TestCase

  def test_1
    bid = Bid.create()

    assert_equal nil, bid.versions[0].reify
  end

  def test_2
    bid = Bid.first

    File.open("linkedin.jpg", 'r') do |f|
      bid.agreement = f
    end
    bid.save()

    assert_equal bid, bid.versions[1].reify
  end

  def test_3
    bid = Bid.first

    bid.remove_agreement!
    bid.save()

    assert_equal bid, bid.versions[2].reify
  end

  def test_4
    bid = Bid.first
    assert_equal bid, bid.versions[2].reify
  end

end