require 'spec_helper' describe Miu::Writable do class MySocket def write; end include Miu::Writable end let(:socket) { MySocket.new } it { expect(socket).to be_respond_to :write } it { expect(socket).to be_respond_to :write_with_packet } it { expect(socket).to be_respond_to :write_without_packet } describe '#write' do let(:tag) { 'tag' } let(:msg) { 'msg' } it do socket.should_receive(:write_without_packet) expect(socket.write tag, msg).to be_instance_of Miu::Packet end end end