How can I spy on a getter property using jasmine?

Question

How can I spy on a getter property using jasmine?

var o = { get foo() {}, };

spyOn(o, \'foo\').and.returnValue(\'bar\'); // Doesn\'t work.

Answer 1

I don't believe you can spy on getters. The point of a getter is that it acts exactly like a property, so how would jasmine be able to spy on it when it is never called like a function but rather is accessed like a property.

As a workaround, you could have your getter call another function and spy on that instead.

var o = {
     _foo: function(){
        return 'foo'; 
     }, 
     get foo(){
        return this._foo();
     }
};

spyOn(o, '_foo').and.returnValue('bar');