require 'test_helper'require 'docs' class DocsInstrumentableTest < MiniTest::Spec  let :extended_class do    Class.new.tap { |klass| klass.send :extend, Docs::Instrumentable }  end   let :included_class do    Class.new.tap { |klass| klass.send :include, Docs::Instrumentable }  end   it "works when extended" do    extended_class.subscribe('test') { @called = true }    extended_class.instrument 'test'    assert @called  end   it "works when included" do    instance = included_class.new    instance.subscribe('test') { @called = true }    instance.instrument 'test'    assert @called  endend