pull_31.rb

pull_31.rb

require 'rubygems'
require 'ruby-debug'

class A
  def self.read
    if @thing
      @thing
    elsif superclass.respond_to?(:read)
      superclass.thing
    else
      {}
    end
  end

  def self.set thing
    @thing = thing
  end
end

class B < A
  def self.read
    if @thing
      @thing
    elsif superclass.respond_to?(:read)
      superclass.thing
    else
      {}
    end
  end

  def self.set thing
    @thing = thing
  end
end

class C < A
  def self.read
    if @thing
      @thing
    elsif superclass.respond_to?(:read)
      puts "If you see this without errors, we're good, right?"
      superclass.read
    else
      {}
    end
  end

  def self.set thing
    @thing = thing
  end
end



A.set 'foo'

raise "Fail" if A.read.nil? # fixed in gh-3

a = A.new


B.set 'bar'
b = B.new

raise "Fail" unless A.read == 'foo' # fixed in current pull request
raise "Fail" unless B.read == 'bar'

c = C.new
val = c.class.read
raise "Fail #{val} ?" unless val == 'foo' # fixed in gh-3, fixed in current pull request