require File.expand_path(File.dirname(__FILE__) + '/edgecase') class AboutModules < EdgeCase::Koan module Nameable def set_name(new_name) @name = new_name end def here :in_module end end def test_cant_instantiate_modules assert_raise(___) do Nameable.new end end # ------------------------------------------------------------------ class Dog include Nameable attr_reader :name def initialize @name = "Fido" end def bark "WOOF" end def here :in_object end end def test_normal_methods_are_available_in_the_object fido = Dog.new assert_equal __, fido.bark end def test_module_methods_are_also_availble_in_the_object fido = Dog.new assert_nothing_raised(Exception) do fido.set_name("Rover") end end def test_module_methods_can_affect_instance_variables_in_the_object fido = Dog.new assert_equal __, fido.name fido.set_name("Rover") assert_equal __, fido.name end def test_classes_can_override_module_methods fido = Dog.new assert_equal __, fido.here end end