TypeError: Attempted to wrap which is already wrapped

Question

My codes:

  before(function _before() {
    this.myObject = new MyObject();
  });
  it('should', sinon.test(function() {
    const stubLog = sinon.stub(this.myObject.log, 'warn');
  }));
  it('should 2', sinon.test(function() {
    const stubLog = sinon.stub(this.myObject.log, 'warn');
  }));

sinon version: 1.17.6

Why I got the error TypeError: Attempted to wrap warn which is already wrapped in should 2 test? Should I restore stubLog manually? I think sinon.test() will do it for me. Maybe I did something wrong?

Any comments welcomed. Thanks

score 0 · Answer 1 · answered Apr 11 '23 at 04:29

0

You're getting the error because you need to reset the stub before creating another one. You can do this using stub.reset() or stub.restore(), ideally inside beforeEach.

https://sinonjs.org/releases/latest/stubs/

answered Apr 11 '23 at 04:29

Vy Nguyen

11
1

score -1 · Accepted Answer · answered Aug 23 '17 at 05:44

Have you tried using this.stub() instead of sinon.stub() inside the sandbox?

const stubLog = this.stub(this.myObject.log, 'warn');

From the official docs, an example:

it('should do something', sinonTest(function(){
    var spy1 = this.spy(myFunc);
    var spy2 = this.spy(myOtherFunc);
    myFunc(1);
    myFunc(2);
    assert(spy1.calledWith(1));
    assert(spy1.calledWith(2));
}));

Once wrapped with sinon.test(), the function would access the this pointer inside itself and use it to stub/spy other functions.

Using it like that should restore your stubs automatically for you.

TypeError: Attempted to wrap which is already wrapped

2 Answers2