I have this function:

export const setData = (a, b) => (b !== undefined ? { a, b } : { a });

export const processData = arr => {
  const obj = {};
  arr.forEach(item => obj[item[0]] = val => setData(item[1], val);
  return obj;
};

The way I use this function is like this:

const data = [
   ['setSomething', 'SET_SOMETHING'],
   ['setAnotherThing', 'SET_ANOTHER_THING']
];

const setters = processData(data);

and then I can call them like setters.setSomething() or setters.setSomething(1234).

How can I test this with Jest? I thought of this:

const mocked = [
  ['setSomething', 'SET_SOMETHING'],
  ['setAnotherThing', 'SET_ANOTHER_THING'],
];

const result = processData(mocked);

expect(result).toEqual({
  setSomething: () => {}
  setAnotherThing: () => {}
});

But it fails saying this:

Expected:

    "setSomething": [Function setSomething],
    "setAnotherThing": [Function setAnotherThing],

Received:

    "setSomething": [Function anonymous],
    "setAnotherThing": [Function anonymous],

Any way to test this?