gistfile1.js

var Sample = function() {
  var iamHidden = "you can't see me!";

  this.lookInside = function() {
    return iamHidden;
  };
};

describe("Sample", function() {
  it("should be equal", function() {
    var a = new Sample(), b = new Sample();
    expect(a).toEqual(b); // => fails
  });
});

// It fails because a.lookInside !== b.lookInside, but what would be the correct way to implement privileged methods then?