Do You Need Spies To Test If A Function Has Been Called In Jasmine?

Am learning Jasmine, wondering if the following test would be valid? And if not, can someone explain why? I've been reading a number of tutorials and can't find a good explanation

Solution 1:

You need to do two things, first you need to spy on the function before the click. Normally you would spy on a function like this that is a member of an object. Where is populateNotes defined? You need a reference to it somehow.

// This might work, if the function is defined globally. 
spyOn(window, 'populateNotes');

// Then do your action that should result in that func being called
$("#show-cart").click();

// Then your expectation. The expectation should be on the function
// itself, not on the result. So no parens.
expect(window.populateNotes).toHaveBeenCalled();