mocks and stubs with oncall

[hale...@gmail.com]

Hi there!

This is I guess (very) related to https://github.com/sinonjs/sinon/issues/1381. Actually this code:

describe('test onCall', () => {

 class C {

   f() {

     return 1111;

   }

 }

  it('test', () => {

   let c = new C();

   

   let stub = sinon.stub(c, 'f');

   stub.onCall(0).returns(0);

   stub.onCall(1).returns(1);

   expect(c.f()).to.be.equal(0);

   expect(c.f()).to.be.equal(1);

 });

});

is working as expected and the test pass (using chai expect assertions).

However, using mocks, as recommended in the github issue above, just like:

Enter code here...

describe('test onCall', () => {

  class C {

    f() {

      return 1111;

    }

  }

  it('test', () => {

    let c = new C();

let mock = sinon.mock(c);

    let stub = mock.expects('f')

    

stub.onCall(0).returns(0);

stub.onCall(1).returns(1);

expect(c.f()).to.be.equal(0);

expect(c.f()).to.be.equal(1);

  });

});

is not working and I'm getting expectations errors:

1) test onCall
       test:
     ExpectationError: Unexpected call: f()
    Expectation met: f([...]) once

I'd like to use mocks on calls for a more serious tests.
So, am I doing anything wrong or is this an issue on sinon library?

Thanks!!