lets for javascript tests??

gistfile1.js

var SubjectClass = require('subject-class');

describe("NewLets", function(){
  
  var subject;
  
  stage('subject', function(){
    subject = new SubjectClass;
  });
  
  it("should be a subject", function(){
    expect(subject).to.be.a(SubjectClass);
  });
  
  describe("Nested", function(){
    stage('subject', function(){
      subject = new SubjectClass({isFoo: true});
    });
    
    it('should have isFoo', function(){
      expect(subject.isFoo).to.be(true);
    });
  
  });
  
  
  
});

Note that the intent is so the "Nested" describe will call stage('subject') only once the higher level stage will not be called.