didRecalculateAfterUserInput = (/** @type {sinon.SinonSpy<any[], any>} */ spy) =>
            spy.callCount > 1 && !spy.getCalls().find(isCalculateCallAfterUserInput)
The _calculateValues method is called inside _onUserInputChanged w/o providing args
@param {sinon.SinonSpyCall} call
@returns {boolean}