require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Module#undefined_instance_methods" do
  it "returns methods undefined in the class" do
    methods = ModuleSpecs::UndefinedInstanceMethods::Parent.undefined_instance_methods
    methods.should == [:undefed_method]
  end

  it "returns inherited methods undefined in the class" do
    methods = ModuleSpecs::UndefinedInstanceMethods::Child.undefined_instance_methods
    methods.to_set.should >= Set[:parent_method, :another_parent_method]
  end

  it "returns methods from an included module that are undefined in the class" do
    methods = ModuleSpecs::UndefinedInstanceMethods::Grandchild.undefined_instance_methods
    methods.should.include?(:super_included_method)
  end

  it "does not returns ancestors undefined methods" do
    methods = ModuleSpecs::UndefinedInstanceMethods::Grandchild.undefined_instance_methods
    methods.should_not.include?(:parent_method)
    methods.should_not.include?(:another_parent_method)
  end
end
