describe "ABC" do it { is_expected.to start_with 'A' } it { is_expected.to end_with 'C' } it { is_expected.not_to start_with 'X' } it { is_expected.not_to end_with 'Z' } # 確かに正規表現よりドキュメンタブルではある it { is_expected.to match /^A/ } it { is_expected.to match /B$/ } it { is_expected.not_to match /^X/ } it { is_expected.not_to match /Z$/ } end