Does this work? Will this give me the ruby mocha like expectation? missle.expects(:launch).never

gistfile1.js

function callWatcher(fn) {
  var called = false;
  return function() {
    if(!called) {
      called = true;
    }
    return !called;
  };
}

var successfulCallback = function() {
  console.log("I am a raving success!!!!");
};
successfulCallback = callWatcher(successfulCallback);

// Has this callback been called?
expect(successfulCallback()).to.be.false;
expect(successfulCallback()).to.be.true;