Reminder for myself: self contained file for making quick isolated rails tests

inline-self-contained-rails-test.rb

#!/usr/bin/env ruby

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  
  gem 'rails', '~> 6.1'
  gem 'byebug'
end

require "action_dispatch/railtie"
require "action_controller/railtie"

class TestApp < Rails::Application
  routes.draw do
    get '/random', to: 'sample#index'
  end
end

class SampleController < ActionController::Base
  def index
  end
end

require "minitest/autorun"
class BugTest < ActionDispatch::IntegrationTest
  def test_association_stuff
    assert_recognizes({controller: 'sample', action: 'index'}, 'random')
  end

  def setup
    @routes = app.routes
  end

  private

  def app
    Rails.application
  end
end