visibility_and_inheritance.rb

# inheritence question:
# When mixing in a module, how does super work?
# Does it behave the same for protected methods?
# And private methods?

class Parent
  def log(name)
    puts name
    puts self.class
  end

  def self.inherited(base)
    puts "Inherited: #{base}"
  end

  class << self
    attr_accessor :static_value
    def static_value
      @static_value ||= self.class.to_s
    end
  end

  def public_method; log('parent') end

  protected

  def protected_method; log('parent') end

  private

  def private_method; log('parent') end
end

module Cousin
  def public_method
    log 'cousin'
    super
    raise 'ouch'
  rescue Exception =>e
    puts "error rescued: #{e}"
  end

  protected

  def protected_method
    log 'cousin'
    super
  end

  private

  def private_method
    log 'cousin'
    super
  end
end

class Child < Parent
  prepend Cousin

  def public_method
    log 'child'
    super
  end

  def wrap_protected
    protected_method
  end

  def wrap_private
    private_method
  end

  protected

  def protected_method
    log 'child'
    super
  end

  private

  def private_method
    log 'child'
    super
  end
end