Sinon Stub / Spy using WithArgs doesn't behave as expected

Question

When I specify withArgs for a sinus spy or stub, I expect callCount to only count calls with these arguments. This does not seem to be happening.

If I run the following:

var mySpy = sinon.spy(); mySpy.withArgs("foo"); mySpy("bar"); expect(mySpy.callCount).to.be(0); 

I get "expected 1 equal to 0". Am I crazy, is this a mistake, or is there any other way to do this?

Answer 1

You should also add withArgs to the statement:

 var mySpy = sinon.spy(); mySpy.withArgs("foo"); mySpy("bar"); expect(mySpy.withArgs("foo").callCount).to.be(0);