RSpec deprecation warnings not recorded without additional ENV var

[project-orcon]

README needs to be updated for RSpec.

With the below configuration DeprecationToolkit::Configuration.warnings_treated_as_deprecation = [//]

expected the below code to trigger a deprecation warning, which it didn't

require 'spec_helper'

class MyClass
  def foo(k: 1)
    p k
  end
end

RSpec.describe MyClass do

    it 'calls method' do
      h = { k: 42 }
      MyClass.new.foo(h)
    end
end

expected the following warning "warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call"

Need to run with additional ENV VAR RUBYOPT='-W:deprecated' RUBYOPT='-W:deprecated' DEPRECATION_BEHAVIOR="record" bundle exec rspec spec

[etiennebarrie]

This is something related to Ruby 2.7.2 disabling deprecated warnings, and RSpec not enabling them either. You can read more about it in https://github.com/rspec/rspec-core/issues/2867.

You can add Warning[:deprecated] = true in your spec/spec_helper.rb to enable those.