How to mock/replace getter function of object with Jest?

Question

In Sinon I can do the following:

var myObj = {
    prop: \'foo\'
};

sinon.stub(myObj, \'prop\').get(function getterFn() {
    return \'bar\';
});

myObj.prop; /         


        

Answer 1

For anyone else stumbling across this answer, Jest 22.1.0 introduced the ability to spy on getter and setter methods.

Edit: like in scieslak's answer below, because you can spy on getter and setter methods, you can use Jest mocks with them, just like with any other function:

class MyClass {
  get something() {
    return 'foo'
  }
}

jest.spyOn(MyClass, 'something', 'get').mockReturnValue('bar')
const something = new MyClass().something

expect(something).toEqual('bar')