Activatable concern for Rails 5

1_add_activable_fields_to_model.rb

class AddActivatableFieldsToModel < ActiveRecord::Migration[5.0]
  def change
    add_column :users, :archived, default: false
    add_column :users, :test, default: false
    add_column :users, :dummy, default: false
    
    add_index :users, :archived
  end
end

activatable.rb

# app/models/concerns/activatable.rb

module Activatable
  extend ActiveSupport::Concern

  included do
    scope :actives, -> { where(archived: false, test: false, dummy: false) }
    scope :inactives, -> { where("archived IS TRUE OR test IS TRUE OR dummy IS TRUE") }
    scope :archives, -> { where(archived: true) }
    scope :tests, -> { where(test: true) }
    scope :dummies, -> { where(dummy: true) }
  end

  def active?
    !archived && !test && !dummy
  end

  def activate!
    update(archived: false, test: false, dummy: false)
  end

  def archive!
    update(archived: true)
  end

  def unarchive!
    update(archived: false)
  end

  def testify!
    update(test: true)
  end

  def dummify!
    update(dummy: true)
  end
end

activatable_shared_spec.rb

# spec/concerns/activatable_shared.rb

require "rails_helper"

shared_examples "activatable" do
  let(:model) { described_class }

  it "is active by default" do
    instance_of_class = FactoryGirl.create(model.to_s.underscore.to_sym)
    expect(instance_of_class.active?).to be_truthy
  end

  it "is not archived by default" do
    instance_of_class = FactoryGirl.create(model.to_s.underscore.to_sym)
    expect(instance_of_class.archived).to be_falsey
  end

  it "is not tested by default" do
    instance_of_class = FactoryGirl.create(model.to_s.underscore.to_sym)
    expect(instance_of_class.test).to be_falsey
  end

  it "is not dummied by default" do
    instance_of_class = FactoryGirl.create(model.to_s.underscore.to_sym)
    expect(instance_of_class.dummy).to be_falsey
  end

  describe ".activate" do
    it "makes the instance active" do
      instance_of_class = FactoryGirl.create(described_class.name.underscore.to_sym, :archived, :test, :dummy)
      expect(instance_of_class.archived).to be_truthy
      expect(instance_of_class.test).to be_truthy
      expect(instance_of_class.dummy).to be_truthy
      instance_of_class.activate!
      expect(instance_of_class.archived).to be_falsey
      expect(instance_of_class.test).to be_falsey
      expect(instance_of_class.dummy).to be_falsey
    end
  end

  describe ".archive!" do
    it "makes the instance archived" do
      instance_of_class = FactoryGirl.create(described_class.name.underscore.to_sym, archived: false)
      expect(instance_of_class.archived).to be_falsey
      instance_of_class.archive!
      expect(instance_of_class.archived).to be_truthy
    end
  end

  describe ".unarchive!" do
    it "makes the instance unarchived" do
      instance_of_class = FactoryGirl.create(described_class.name.underscore.to_sym, :archived)
      expect(instance_of_class.archived).to be_truthy
      instance_of_class.unarchive!
      expect(instance_of_class.archived).to be_falsey
    end
  end

  describe ".testify!" do
    it "makes the instance in a state of test" do
      instance_of_class = FactoryGirl.create(described_class.name.underscore.to_sym)
      expect(instance_of_class.test).to be_falsey
      instance_of_class.testify!
      expect(instance_of_class.test).to be_truthy
    end
  end

  describe ".dummify!" do
    it "makes the instance dummied" do
      instance_of_class = FactoryGirl.create(described_class.name.underscore.to_sym)
      expect(instance_of_class.dummy).to be_falsey
      instance_of_class.dummify!
      expect(instance_of_class.dummy).to be_truthy
    end
  end

  describe ".actives" do
    it "only selects instances where archived and test is false" do
      FactoryGirl.create(described_class.name.underscore.to_sym, :archived, :test)
      FactoryGirl.create(described_class.name.underscore.to_sym, :archived)
      FactoryGirl.create(described_class.name.underscore.to_sym, :test)
      FactoryGirl.create(described_class.name.underscore.to_sym, :dummy)
      FactoryGirl.create(described_class.name.underscore.to_sym, test: false, archived: false, dummy: false)
      expect(described_class.count).to eq 5
      expect(described_class.actives.count).to eq 1
    end
  end

  describe ".inactives" do
    it "only selects instances where archived and test is false" do
      FactoryGirl.create(described_class.name.underscore.to_sym, :archived)
      FactoryGirl.create(described_class.name.underscore.to_sym, :test)
      FactoryGirl.create(described_class.name.underscore.to_sym, :dummy)
      FactoryGirl.create(described_class.name.underscore.to_sym, archived: false, test: false, dummy: false)
      expect(described_class.count).to eq 4
      expect(described_class.inactives.count).to eq 3
    end
  end

  describe ".archives" do
    it "only selects instances where archived is false" do
      FactoryGirl.create(described_class.name.underscore.to_sym, :archived)
      FactoryGirl.create(described_class.name.underscore.to_sym, :archived)
      FactoryGirl.create(described_class.name.underscore.to_sym, archived: false)
      expect(described_class.count).to eq 3
      expect(described_class.archives.count).to eq 2
    end
  end

  describe ".tests" do
    it "only selects instances where test is false" do
      FactoryGirl.create(described_class.name.underscore.to_sym, :test)
      FactoryGirl.create(described_class.name.underscore.to_sym, :test)
      FactoryGirl.create(described_class.name.underscore.to_sym, test: false)
      expect(described_class.count).to eq 3
      expect(described_class.tests.count).to eq 2
    end
  end

  describe ".dummies" do
    it "only selects instances where dummy is true" do
      FactoryGirl.create(described_class.name.underscore.to_sym, :dummy)
      FactoryGirl.create(described_class.name.underscore.to_sym, :dummy)
      FactoryGirl.create(described_class.name.underscore.to_sym, dummy: false)
      expect(described_class.count).to eq 3
      expect(described_class.dummies.count).to eq 2
    end
  end
end

user.rb

# app/models/user.rb

class User < ActiveRecord::Base
  include Activatable
  
  ...
  
end

user_spec.rb

# spec/users_spec.rb

require "rails_helper"
require "concerns/activatable_shared"

describe User, type: :model do
  it_behaves_like "activatable"

  ...

end

users.rb

# spec/factories/users.rb

FactoryGirl.define do
  factory :user do
    ...

    trait :archived do
      archived { true }
    end

    trait :test do
      test { true }
    end

    trait :dummy do
      dummy { true }
    end
  end
end