masasakano

Testing with a newer stack on Heroku while keeping the existing app on the current stack

Heroku Official Guide

Manual testing (for heroku-24-stack) with a Ruby-on-Rails app

1. Create an app: heroku create --remote heroku-24 --stack heroku-24 <your app name>-heroku-24
   • creating an app: <your app name>-heroku-24; let us call it <your-app-24>
2. Associate the add-ons that are associated with your current one
3. Copy all config values to the heroku-24 app

masasakano

module ModuleWasFounds
  class InconsistencyInWasFoundError < StandardError  # ModuleWasFounds::InconsistencyInWasFoundError
    ## Error in inconsistency in ModuleWasFound#was_found? and ModuleWasFound#was_created?
  end
end

masasakano

  # Returns the String for the caller information
  #
  # @example To display the location of the last caller in the *_test.rb file.
  #    assert abc, sprintf("(%s): abc=%s", _get_caller_info_message, abc.inspect)  # defined in test_helper.rb
  #
  # @example displays the exact line where an error occurs
  #    assert false, _get_caller_info_message(bind_offset: -1, prefix: true)+" Error occurs exactly at this line."
  #
  # @param bind_offset: [Integer, NilClass] offset for caller_locations (used for displaying the caller routine). In default (=nil), the last location in *_test.rb (such as, inside a block). If this is 0, it is useful in the case where this method is called in a test library method that is called from an original test routine. Therefore, specify "-1" to get the information of the caller itself (Second example above).
  # @param fmt: [String] sprintf format. It must contain %s (for path) and %d (or %s) (for line number) in this order.

masasakano

# -*- coding: utf-8 -*-

require 'w3c_validators'

# Module to deal with W3C Validator
#
# == Usage
#
# Put this file in one of your library-load paths in the test environment.
# Then, in /test/test_helper.rb

masasakano

Goals

• Languages are :en and :ja and :fr, where :en is the default.
• It is path-based, like /ja/articles is for Index of Article model.
• Allow access without the locale parameter in the path like http://example.com/articles
  • in which case the locale parameter I18n.locale should be set according to the browser's request, falling back to :en

Install i18n default translations

masasakano

# coding: utf-8
ENV['RAILS_ENV'] ||= 'test'
require_relative '../config/environment'
require 'rails/test_help'
require 'w3c_validators'  # Key module. Write in Gemfile:  gem 'w3c_validators'

# meant to be included in /test/test_helper.rb
class ActiveSupport::TestCase

  # Botch fix of W3C validation errors for HTMLs generated by button_to

masasakano

Upgrade/Migrate from Rails 6.1 to 7 with bootstrap

Background

It is a major version up, in particular:

• Rails 6 almost dropped Sprockets in favour of Webpack
• Rails 7 almost dropped Webpack in favour of jsbundling-rails + import maps (or esbuild) + Sprockets.

The backgrond is

masasakano

require "tempfile"

# TeeIO to "tee" (or splice) an IO
#
# Basically this overwrites IO#write .
#
# Note this does not capture IO#syswrite
#
# The main part but {TeeIO.suppress_io} is taken from
# {https://stackoverflow.com/a/9439298/3577922}

masasakano

gem "minitest"
require 'minitest/autorun'
require 'tempfile'

# In general, each test method should generate its own temporary files.
# With the following code, the temporary files will be automatically deleted 
# at the end of the processing, even if their IOs have been alraedy closed
# and only the filename (path) were utilised during processing.

class TestUnitMyLibrary < MiniTest::Test

masasakano

require 'optparse'
require 'optparse/time'  # if Time is used.
#require 'ostruct'
require 'pp'

# This example file for using Ruby optparse is based on the original example
# code in Github, specifically, commit number f2b8318, or roughly for Ruby 3.1.2.
# https://github.com/ruby/optparse
# I have added several sections and modified some parts, as well as annotated
# the code extensively with my comments.