From: merch-redmine@...
Date: 2020-07-30T21:18:19+00:00
Subject: [ruby-core:99406] [Ruby master Bug#17093] attr_accessor works	strange

Issue #17093 has been updated by jeremyevans0 (Jeremy Evans).

Status changed from Open to Feedback

Do you expect the `type = 'default'` in `b` to set the @type instance variable to `'default'`?  If so, that doesn't work, you need to use `self.type =` instead of `type =`.  If not, can you provide an explanation of what behavior you are expecting? 

----------------------------------------
Bug #17093: attr_accessor works strange
https://bugs.ruby-lang.org/issues/17093#change-86854

* Author: mpavel (pavel m)
* Status: Feedback
* Priority: Normal
* ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin17]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
require 'rubygems'

class A
  def initialize(type:)
    @type = type
  end

  def b
    p type
    p type.nil?
    type = 'default' if type.nil?
    type
  end

  private

  attr_accessor :type
end

RSpec.describe A do
  let(:type) { 'whoaaa' }

  it 'return default' do
    expect(A.new(type: type).b).to eq('default')
  end

  it 'instance variable is "whoaaa"' do
    expect(A.new(type: type).instance_variable_get(:@type)).to eq(type)
  end
end

all tests green

output
A
"whoaaa"
false
  return default
  instance variable is "whoaaa"



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