rails-25432.rb

require 'action_controller/railtie'
require 'minitest/autorun'
require 'rack/test'

class TestApp < Rails::Application
  config.root = File.dirname(__FILE__)
  config.session_store :cookie_store, key: 'cookie_store_key'
  secrets.secret_token    = 'secret_token'
  secrets.secret_key_base = 'secret_key_base'
  config.logger = Logger.new($stdout)
  Rails.logger  = config.logger

  routes.draw do
    get '/' => 'test#index'
    post '/' => 'test#create'
  end
end

class TestController < ActionController::Base
  include Rails.application.routes.url_helpers

  def index
    @ticket = Ticket.new
    render plain: '<%= form_for(@ticket) { |f| f.select :priority, Ticket.priorities.map { |key, value| [key, value] }  } %>'
  end

  def create
    @ticket = Ticket.new(ticket_params)
    @ticket.save
  end

protected
  def ticket_params
    params.require(:ticket).permit(:priority)
  end
end

require 'active_record'
require 'logger'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :tickets, force: true do |t|
    t.integer "priority"
  end
end

class Ticket < ActiveRecord::Base
  enum priority: { 'High': 0, 'Middle': 1, 'Low': 2 }
end

class BugTest < Minitest::Test
  include Rack::Test::Methods

  def test_returns_success
    post '/', {ticket: {priority: '1'}}
    assert last_response.ok?
  end

  private
    def app
      Rails.application
    end
end