How can I test that the stack is clear, in a mocha test?

In my code, there is an asynchronous function that doesn't return. When it gets called, it just runs some stuff in the background.

I want to test that a second function is getting called inside this function.

The problem is, I need to wait for asyncFunction to be complete before I can perform the check if someOtherFunctionCall was called.

Is there any way I can check the status of the stack to see that no function is currently running?

function asyncFunction(){
    setTimeout(() => {
        someOtherFunctionCall();
        console.log("Time Passed");
    }, 3000)
}


it('the test', () => {
    spyOn(someOtherFunctionCall);

    asyncFunction();

    // Wait for stack to be clear ??

    expect(asyncFunction).to.have.been.called;
});