kamipo

using Module.new {
  refine Enumerable do
    alias :orig_sum :sum
  end
}

module Enumerable
  def sum(...)
    p method(:orig_sum)
  end

kamipo

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails"

kamipo

```bash
brew install postgresql

pg_config

mkdir -p /usr/local/var/postgres
initdb /usr/local/var/postgres -E utf8
vi /usr/local/var/postgres/postgresql.conf

kamipo

test_run_in_parallel_with_unmarshable_exception
test_run_in_parallel_with_unknown_object

% bin/test test/application/test_runner_test.rb -n test_run_in_parallel_with_unknown_object

kamipo

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails"

kamipo

puts RUBY_VERSION

module Rails
end

def Rails.root; :defined_root end

p defined?(Rails.root)

Rails.instance_eval { undef :root }

kamipo

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails"

kamipo

class Foo
  def initialize(target)
    @target = target
  end

  if RUBY_VERSION > "2.7"
    def method_missing(method, *args, **kwargs, &block)
      @target.send(method, *args, **kwargs, &block)
    end
  else

kamipo

# frozen_string_literal: true

require "mysql2"

def client
  Mysql2::Client.new(
    host: "localhost",
    username: "root",
    database: "test",
  )

kamipo

# Load the Rails application.
require_relative 'application'

# Initialize the Rails application.
Rails.application.initialize!

ActiveRecord::SchemaDumper.ignore_tables << %r{
  \A (?:
      _           # initials _
    | test_       # for testing