use BDD::Behave; describe -> 'foo bar' { let(:number) => { 42 }; context -> 'bar baz' { it -> 'baz foo' { expect(42).to.be(42); expect(:number).to.be(42); expect(42).to.be(:number); } } context -> 'baz foo' { let(:number) => { '42' }; it -> 'final foo bar has 3 expects' { expect('42').to.be('42'); expect(:number).to.be('42'); expect('42').to.be(:number); } } }