4. とりあえず Spec はこんな感じ
describe Suenami
subject { Suenami.instance }
it { expect(subject).to be_tdder }
it { expect(subject).to be_ddder }
it { expect(subject).to be_joined :tddbc }
describe #usable_languages do
it { expect(subject.usable_languages).to include :ruby }
it { expect(subject.usable_languages).to include :php }
it { expect(subject.usable_languages).to include :javascript }
it { expect(subject.usable_languages).to include :scala }
it { expect(subject.usable_languages).to include :go }
end
end