Chai + Sinon error: method is already wrapped

Question

I am getting error:

• TypeError: Attempted to wrap ajax which is already wrapped

• Error: Stack Trace for original chai.should();

  describe("Test API", function() {
  
    it('executes a GET request for ISPs', function() {
      var mySpy = sinon.spy(jQuery, "ajax");
      sinon.stub(jQuery, 'ajax');
      mySpy.should.have.been.calledWithMatch({
      url: 'http://data-api.measurementlab.net/locations/nausdcwashington/clients'
      });
    });
  
    after(function() {
      jQuery.ajax.restore();
   });
  });
  

I came across similar posts and added the after block. Still getting the same error: Sinon.js- Trying to spy on console.log but it is already wrapped

Answer 1

is that the only place you're stubbing ajax? If not, you need to make sure you restore it after each test before trying to stub it again

Answer 2

Why are you stubbing and spying jQuery.ajax? Remove this line: sinon.stub(jQuery, 'ajax');