Resources

Factory Bot Gem - https://github.com/thoughtbot/factory_bot
Factory Bot Getting Starting - https://github.com/thoughtbot/factory_bot/blob/master/GETTING_STARTED.md
Faker Gem - https://github.com/stympy/faker
Source - https://github.com/driftingruby/103-sample-data-with-factory-bot-and-faker

Summary

Gemfilegroup :test do
  # gem 'factory_bot'
  gem 'factory_bot_rails'
  gem 'faker'
end

rails_helper.rb# require 'support/factory_bot'
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }

spec/factories/users.rbFactoryBot.define do
  factory :user do
    first_name 'John'
    last_name 'Doe'
    email '[email protected]'
    active true
  end

  factory :random_user, class: User do
    first_name { Faker::Name.first_name }
    last_name { Faker::Name.last_name }
    email { Faker::Internet.safe_email }
    active true
  end
end

user_spec.rbFactoryBot.define do
  factory :user do
    first_name 'John'
    last_name 'Doe'
    email '[email protected]'
    active true
  end

  factory :random_user, class: User do
    first_name { Faker::Name.first_name }
    last_name { Faker::Name.last_name }
    email { Faker::Internet.safe_email }
    active true
  end
end

user.rbclass User < ApplicationRecord
  scope :active_users, -> { where(active: true) }
  scope :inactive_users, -> { where(active: false) }
  validates :first_name, presence: true
  validates :last_name, presence: true
  validates :email, presence: true, uniqueness: true
end