Monkeys don't emit update events?

I’m using monkeys to join a bunch of separate paths into an array with all of my data. My dependencies look like this:

A(cursor)              B(cursor)    C(cursor)
          \            /            /
            D(monkey)              /          
                      \          /
                        E(monkey)

When any of A, B, or C update, the appropriate monkeys are updated. However, the monkeys themselves do not appear to emit update events, which means that I don’t get the updated monkey values unless I periodically re-check them.

I could watch the cursors for updates and re-evaluate the monkeys, but then I have to declare the monkeys’ dependencies everywhere it’s used. #358 says that monkeys aren’t cursors – am I experiencing the intended monkey behavior? What is the suggested way to get an update event from a monkey?

[Nimelrian]

Hello! Is there any update on this? I tried fixing this issue myself last week, but ultimately failed, because I’m not very familiar with the inner workings of Baobab.

I have written the following test case which you can drop into the monkey suite:

describe('Issue #448 - Monkeys don\'t emit update events?', function () {
  it('update events emitted by a monkey should also reach the parents of the monkey.', function (done) {
    const tree = new Baobab({
      value: 5,
      monkeys: {
        valueSquared: monkey(['value'], value => value * value)
      }
    }, {
      lazyMonkeys: false
    });

    const newValue = 10;
	
    const parentCursor = tree.select('monkeys');
    parentCursor.on('update', () => {
      assert.strictEqual(tree.get(['monkeys', 'valueSquared']), newValue * newValue);
      done();
    });

    tree.set(['value'], newValue);
  });
});

[Yomguithereal]

Merged the PR and released 2.5.1 on npm. Thanks @roark.