rails_issue_44075_code_inflection.rb

require 'active_support/all'
require 'minitest/autorun'
require 'zeitwerk'

class ASITest < Minitest::Test
  module CodeInflector
    extend ActiveSupport::Inflector

    def self.inflections
      i = ActiveSupport::Inflector::Inflections.new
      i.acronym 'SSN'
      i
    end
  end

  def test_camelize
    {
      'create_wombats' => 'CreateWombats', # passes
      'create_ssn' => 'CreateSSN', # passes
      'create_ssns' => 'CreateSSNs' # fails with "CreateSsns"
    }.each do |k, v|
      assert_equal v, CodeInflector.camelize(k)
    end
  end
end

class ZeitTest < Minitest::Test
  def test_camelize
    i = Zeitwerk::Inflector.new
    {
      'create_wombats' => 'CreateWombats',
      'create_ssns' => 'CreateSSNs'
    }.each do |k, v|
      i.inflect(k => v)
      assert_equal v, i.camelize(k, '/dev/null')
    end
  end
end