[Deleted incorrect issue]

[roneyrao]

We understand you have a problem and are in a hurry, but please provide us with some info to make it much more likely for your issue to be understood, worked on and resolved quickly.

• Sinon version : please verify that the bug exists in the latest Sinon release 4.4.2
• Environment : Linux version 4.10.0-43-generic (buildd@lgw01-amd64-037) (gcc version 6.3.0 20170406 (Ubuntu 6.3.0-12ubuntu2)
• Example URL :
• Other libraries you are using:

What did you expect to happen?

  var obj = {};
  function Cls() {
    return obj;
  }
  expect(new Cls()).equal(obj); // true

  var ClassSpy = sinon.spy(Cls);
  expect(new ClsSpy()).equal(obj); // false, expect true

What actually happens
It does not respect the rule that when a function returns an object, this object should become the instance of it when called with new as a constructor.

How to reproduce

Describe with code how to reproduce the faulty behaviour,
or link to code on JSBin or similar

Really long code sample or stacktrace

If you need to provide a dump of a stack trace or
other lengthy material, such as 80 lines of example code,
please stuff it in a `<details>` tag such as this
to make the issue more readable. Thanks.

[mantoni]

Thanks for filing. I think #1683 is somewhat related.

[mantoni]

Same as #1676