ruby--ruby/spec/ruby/core/module/extended_spec.rb

require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

describe "Module#extended" do
  it "is called when an object gets extended with self" do
    begin
      m = Module.new do
        def self.extended(o)
          $extended_object = o
        end
      end

      (o = mock('x')).extend(m)

      $extended_object.should == o
    ensure
      $extended_object = nil
    end
  end

  it "is called after Module#extend_object" do
    begin
      m = Module.new do
        def self.extend_object(o)
          $extended_object = nil
        end

        def self.extended(o)
          $extended_object = o
        end
      end

      (o = mock('x')).extend(m)

      $extended_object.should == o
    ensure
      $extended_object = nil
    end
  end

  it "is private in its default implementation" do
    Module.new.private_methods.should include(:extended)
  end
end