Confusing: "Overrides obj.method with a mock function and returns it"

[timmolendijk]

The description here confuses me: "Overrides obj.method with a mock function and returns it."

It appears to say that sinon.mock(obj).expects("method") returns the same function as the one that is put in place at obj.method, while what is returned sports the expectation interface and the replacement function doesn't.

Related: as far as I can reproduce, the jQuery.ajax.verify() call as mentioned here will not work as verify won't exist. (Am I missing something?)